/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/parallel/parallel-sum-equiv.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9b7772ad7705253c1305067fc38dc9bc7271fbe3-9b7772a [2021-04-15 03:30:25,014 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-04-15 03:30:25,018 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-04-15 03:30:25,069 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-04-15 03:30:25,137 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-04-15 03:30:25,138 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-04-15 03:30:25,139 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-04-15 03:30:25,144 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 03:30:25,188 INFO L113 SettingsManager]: Loading preferences was successful [2021-04-15 03:30:25,188 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-04-15 03:30:25,189 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-04-15 03:30:25,189 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-04-15 03:30:25,194 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-04-15 03:30:25,194 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-04-15 03:30:25,194 INFO L138 SettingsManager]: * Use SBE=true [2021-04-15 03:30:25,195 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-04-15 03:30:25,195 INFO L138 SettingsManager]: * sizeof long=4 [2021-04-15 03:30:25,195 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-04-15 03:30:25,196 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-04-15 03:30:25,196 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-04-15 03:30:25,197 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-04-15 03:30:25,197 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-04-15 03:30:25,197 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-04-15 03:30:25,197 INFO L138 SettingsManager]: * sizeof long double=12 [2021-04-15 03:30:25,197 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-04-15 03:30:25,197 INFO L138 SettingsManager]: * Use constant arrays=true [2021-04-15 03:30:25,197 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-04-15 03:30:25,198 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-04-15 03:30:25,198 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-04-15 03:30:25,198 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-04-15 03:30:25,198 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-04-15 03:30:25,198 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-04-15 03:30:25,198 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-04-15 03:30:25,198 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-04-15 03:30:25,199 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-04-15 03:30:25,199 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-04-15 03:30:25,199 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-04-15 03:30:25,199 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-04-15 03:30:25,199 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-04-15 03:30:25,199 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-04-15 03:30:25,562 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-04-15 03:30:25,602 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-04-15 03:30:25,606 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-04-15 03:30:25,607 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-04-15 03:30:25,609 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-04-15 03:30:25,610 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/parallel-sum-equiv.wvr.bpl [2021-04-15 03:30:25,610 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/parallel-sum-equiv.wvr.bpl' [2021-04-15 03:30:25,670 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-04-15 03:30:25,672 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-04-15 03:30:25,674 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-04-15 03:30:25,674 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-04-15 03:30:25,674 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-04-15 03:30:25,685 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "parallel-sum-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 03:30:25" (1/1) ... [2021-04-15 03:30:25,692 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "parallel-sum-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 03:30:25" (1/1) ... [2021-04-15 03:30:25,700 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-04-15 03:30:25,702 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-04-15 03:30:25,702 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-04-15 03:30:25,702 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-04-15 03:30:25,710 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "parallel-sum-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 03:30:25" (1/1) ... [2021-04-15 03:30:25,710 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "parallel-sum-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 03:30:25" (1/1) ... [2021-04-15 03:30:25,711 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "parallel-sum-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 03:30:25" (1/1) ... [2021-04-15 03:30:25,711 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "parallel-sum-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 03:30:25" (1/1) ... [2021-04-15 03:30:25,714 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "parallel-sum-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 03:30:25" (1/1) ... [2021-04-15 03:30:25,717 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "parallel-sum-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 03:30:25" (1/1) ... [2021-04-15 03:30:25,718 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "parallel-sum-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 03:30:25" (1/1) ... [2021-04-15 03:30:25,719 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-04-15 03:30:25,720 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-04-15 03:30:25,720 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-04-15 03:30:25,721 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-04-15 03:30:25,723 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "parallel-sum-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 03:30:25" (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 03:30:25,793 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-04-15 03:30:25,794 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-04-15 03:30:25,794 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-04-15 03:30:25,794 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-04-15 03:30:25,794 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-04-15 03:30:25,794 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-04-15 03:30:25,794 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-04-15 03:30:25,794 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-04-15 03:30:25,795 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-04-15 03:30:25,795 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-04-15 03:30:25,795 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-04-15 03:30:25,795 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-04-15 03:30:25,795 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-04-15 03:30:25,795 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-04-15 03:30:25,795 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-04-15 03:30:25,796 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 03:30:26,015 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-04-15 03:30:26,015 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-04-15 03:30:26,016 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread2EXIT is neither atomic block end nor error location. [2021-04-15 03:30:26,016 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread3EXIT is neither atomic block end nor error location. [2021-04-15 03:30:26,017 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread4EXIT is neither atomic block end nor error location. [2021-04-15 03:30:26,018 INFO L202 PluginConnector]: Adding new model parallel-sum-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.04 03:30:26 BoogieIcfgContainer [2021-04-15 03:30:26,018 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-04-15 03:30:26,020 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-04-15 03:30:26,020 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-04-15 03:30:26,023 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-04-15 03:30:26,023 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "parallel-sum-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 03:30:25" (1/2) ... [2021-04-15 03:30:26,024 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d7f88f7 and model type parallel-sum-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.04 03:30:26, skipping insertion in model container [2021-04-15 03:30:26,024 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "parallel-sum-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.04 03:30:26" (2/2) ... [2021-04-15 03:30:26,026 INFO L111 eAbstractionObserver]: Analyzing ICFG parallel-sum-equiv.wvr.bpl [2021-04-15 03:30:26,033 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-04-15 03:30:26,033 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-04-15 03:30:26,037 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-04-15 03:30:26,038 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-04-15 03:30:26,135 INFO L149 ThreadInstanceAdder]: Constructed 10 joinOtherThreadTransitions. [2021-04-15 03:30:26,173 INFO L253 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2021-04-15 03:30:26,193 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-04-15 03:30:26,194 INFO L377 AbstractCegarLoop]: Hoare is true [2021-04-15 03:30:26,194 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-04-15 03:30:26,194 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-04-15 03:30:26,194 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-04-15 03:30:26,194 INFO L381 AbstractCegarLoop]: Difference is false [2021-04-15 03:30:26,194 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-04-15 03:30:26,194 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-04-15 03:30:26,205 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 41 places, 33 transitions, 110 flow [2021-04-15 03:30:26,227 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 105 states, 103 states have (on average 2.9029126213592233) internal successors, (299), 104 states have internal predecessors, (299), 0 states have call successors, (0), 0 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 03:30:26,230 INFO L276 IsEmpty]: Start isEmpty. Operand has 105 states, 103 states have (on average 2.9029126213592233) internal successors, (299), 104 states have internal predecessors, (299), 0 states have call successors, (0), 0 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 03:30:26,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-04-15 03:30:26,244 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:30:26,245 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:30:26,246 INFO L428 AbstractCegarLoop]: === Iteration 1 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 03:30:26,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:30:26,257 INFO L82 PathProgramCache]: Analyzing trace with hash 848381826, now seen corresponding path program 1 times [2021-04-15 03:30:26,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:30:26,267 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680248009] [2021-04-15 03:30:26,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:30:26,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:30:26,576 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 03:30:26,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680248009] [2021-04-15 03:30:26,578 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 03:30:26,578 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-04-15 03:30:26,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575569915] [2021-04-15 03:30:26,601 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-04-15 03:30:26,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:30:26,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-04-15 03:30:26,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-04-15 03:30:26,621 INFO L87 Difference]: Start difference. First operand has 105 states, 103 states have (on average 2.9029126213592233) internal successors, (299), 104 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 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 03:30:26,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:30:26,730 INFO L93 Difference]: Finished difference Result 253 states and 745 transitions. [2021-04-15 03:30:26,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-04-15 03:30:26,732 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-04-15 03:30:26,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:30:26,749 INFO L225 Difference]: With dead ends: 253 [2021-04-15 03:30:26,750 INFO L226 Difference]: Without dead ends: 247 [2021-04-15 03:30:26,753 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 60.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-04-15 03:30:26,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-04-15 03:30:26,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 143. [2021-04-15 03:30:26,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 2.936619718309859) internal successors, (417), 142 states have internal predecessors, (417), 0 states have call successors, (0), 0 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 03:30:26,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 417 transitions. [2021-04-15 03:30:26,823 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 417 transitions. Word has length 16 [2021-04-15 03:30:26,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:30:26,824 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 417 transitions. [2021-04-15 03:30:26,824 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 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 03:30:26,824 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 417 transitions. [2021-04-15 03:30:26,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-04-15 03:30:26,826 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:30:26,826 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:30:26,826 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-04-15 03:30:26,827 INFO L428 AbstractCegarLoop]: === Iteration 2 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 03:30:26,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:30:26,828 INFO L82 PathProgramCache]: Analyzing trace with hash 890214852, now seen corresponding path program 2 times [2021-04-15 03:30:26,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:30:26,828 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384318800] [2021-04-15 03:30:26,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:30:26,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:30:26,886 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 03:30:26,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384318800] [2021-04-15 03:30:26,887 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 03:30:26,887 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-04-15 03:30:26,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239030391] [2021-04-15 03:30:26,889 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-04-15 03:30:26,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:30:26,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-04-15 03:30:26,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-04-15 03:30:26,891 INFO L87 Difference]: Start difference. First operand 143 states and 417 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 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 03:30:26,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:30:26,932 INFO L93 Difference]: Finished difference Result 262 states and 765 transitions. [2021-04-15 03:30:26,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-04-15 03:30:26,933 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-04-15 03:30:26,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:30:26,936 INFO L225 Difference]: With dead ends: 262 [2021-04-15 03:30:26,936 INFO L226 Difference]: Without dead ends: 256 [2021-04-15 03:30:26,937 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-04-15 03:30:26,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-04-15 03:30:26,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 145. [2021-04-15 03:30:26,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 2.923611111111111) internal successors, (421), 144 states have internal predecessors, (421), 0 states have call successors, (0), 0 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 03:30:26,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 421 transitions. [2021-04-15 03:30:26,950 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 421 transitions. Word has length 16 [2021-04-15 03:30:26,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:30:26,951 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 421 transitions. [2021-04-15 03:30:26,951 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 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 03:30:26,951 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 421 transitions. [2021-04-15 03:30:26,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 03:30:26,952 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:30:26,953 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 03:30:26,953 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-04-15 03:30:26,953 INFO L428 AbstractCegarLoop]: === Iteration 3 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 03:30:26,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:30:26,954 INFO L82 PathProgramCache]: Analyzing trace with hash -1702344252, now seen corresponding path program 1 times [2021-04-15 03:30:26,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:30:26,955 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603177669] [2021-04-15 03:30:26,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:30:26,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:30:27,023 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:30:27,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603177669] [2021-04-15 03:30:27,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504709729] [2021-04-15 03:30:27,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 03:30:27,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:30:27,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 4 conjunts are in the unsatisfiable core [2021-04-15 03:30:27,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:30:27,298 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:30:27,298 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:30:27,298 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-04-15 03:30:27,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805131970] [2021-04-15 03:30:27,299 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-04-15 03:30:27,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:30:27,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-04-15 03:30:27,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-04-15 03:30:27,303 INFO L87 Difference]: Start difference. First operand 145 states and 421 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 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 03:30:27,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:30:27,396 INFO L93 Difference]: Finished difference Result 199 states and 578 transitions. [2021-04-15 03:30:27,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-04-15 03:30:27,397 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-04-15 03:30:27,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:30:27,406 INFO L225 Difference]: With dead ends: 199 [2021-04-15 03:30:27,406 INFO L226 Difference]: Without dead ends: 199 [2021-04-15 03:30:27,406 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 59.5ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-04-15 03:30:27,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-04-15 03:30:27,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 149. [2021-04-15 03:30:27,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 3.0067567567567566) internal successors, (445), 148 states have internal predecessors, (445), 0 states have call successors, (0), 0 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 03:30:27,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 445 transitions. [2021-04-15 03:30:27,432 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 445 transitions. Word has length 18 [2021-04-15 03:30:27,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:30:27,433 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 445 transitions. [2021-04-15 03:30:27,433 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 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 03:30:27,433 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 445 transitions. [2021-04-15 03:30:27,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 03:30:27,435 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:30:27,435 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 03:30:27,653 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-04-15 03:30:27,653 INFO L428 AbstractCegarLoop]: === Iteration 4 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 03:30:27,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:30:27,654 INFO L82 PathProgramCache]: Analyzing trace with hash -735916285, now seen corresponding path program 1 times [2021-04-15 03:30:27,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:30:27,654 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325602946] [2021-04-15 03:30:27,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:30:27,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:30:27,711 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:30:27,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325602946] [2021-04-15 03:30:27,711 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 03:30:27,712 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-04-15 03:30:27,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376772419] [2021-04-15 03:30:27,712 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-04-15 03:30:27,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:30:27,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-04-15 03:30:27,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-04-15 03:30:27,714 INFO L87 Difference]: Start difference. First operand 149 states and 445 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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 03:30:27,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:30:27,806 INFO L93 Difference]: Finished difference Result 246 states and 702 transitions. [2021-04-15 03:30:27,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 03:30:27,807 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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 03:30:27,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:30:27,810 INFO L225 Difference]: With dead ends: 246 [2021-04-15 03:30:27,811 INFO L226 Difference]: Without dead ends: 214 [2021-04-15 03:30:27,811 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 30.9ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-04-15 03:30:27,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-04-15 03:30:27,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 164. [2021-04-15 03:30:27,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 2.901840490797546) internal successors, (473), 163 states have internal predecessors, (473), 0 states have call successors, (0), 0 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 03:30:27,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 473 transitions. [2021-04-15 03:30:27,844 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 473 transitions. Word has length 18 [2021-04-15 03:30:27,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:30:27,844 INFO L480 AbstractCegarLoop]: Abstraction has 164 states and 473 transitions. [2021-04-15 03:30:27,844 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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 03:30:27,844 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 473 transitions. [2021-04-15 03:30:27,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 03:30:27,845 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:30:27,846 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 03:30:27,846 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-04-15 03:30:27,846 INFO L428 AbstractCegarLoop]: === Iteration 5 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 03:30:27,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:30:27,847 INFO L82 PathProgramCache]: Analyzing trace with hash -1382578898, now seen corresponding path program 1 times [2021-04-15 03:30:27,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:30:27,847 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26985975] [2021-04-15 03:30:27,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:30:27,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:30:27,873 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:30:27,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26985975] [2021-04-15 03:30:27,874 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 03:30:27,874 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-04-15 03:30:27,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861170207] [2021-04-15 03:30:27,874 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-04-15 03:30:27,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:30:27,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-04-15 03:30:27,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-04-15 03:30:27,875 INFO L87 Difference]: Start difference. First operand 164 states and 473 transitions. 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 03:30:27,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:30:27,891 INFO L93 Difference]: Finished difference Result 153 states and 416 transitions. [2021-04-15 03:30:27,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-04-15 03:30:27,891 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 03:30:27,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:30:27,892 INFO L225 Difference]: With dead ends: 153 [2021-04-15 03:30:27,893 INFO L226 Difference]: Without dead ends: 137 [2021-04-15 03:30:27,893 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-04-15 03:30:27,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-04-15 03:30:27,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 133. [2021-04-15 03:30:27,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.7954545454545454) internal successors, (369), 132 states have internal predecessors, (369), 0 states have call successors, (0), 0 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 03:30:27,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 369 transitions. [2021-04-15 03:30:27,902 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 369 transitions. Word has length 18 [2021-04-15 03:30:27,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:30:27,902 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 369 transitions. [2021-04-15 03:30:27,903 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 03:30:27,903 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 369 transitions. [2021-04-15 03:30:27,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 03:30:27,903 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:30:27,904 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 03:30:27,904 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-04-15 03:30:27,904 INFO L428 AbstractCegarLoop]: === Iteration 6 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 03:30:27,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:30:27,905 INFO L82 PathProgramCache]: Analyzing trace with hash -1747969668, now seen corresponding path program 2 times [2021-04-15 03:30:27,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:30:27,906 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118996193] [2021-04-15 03:30:27,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:30:27,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:30:27,978 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:30:27,979 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118996193] [2021-04-15 03:30:27,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091301209] [2021-04-15 03:30:27,980 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 03:30:28,024 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 03:30:28,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:30:28,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 4 conjunts are in the unsatisfiable core [2021-04-15 03:30:28,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:30:28,168 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:30:28,168 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:30:28,168 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-04-15 03:30:28,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601708379] [2021-04-15 03:30:28,170 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 03:30:28,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:30:28,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 03:30:28,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-04-15 03:30:28,172 INFO L87 Difference]: Start difference. First operand 133 states and 369 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:30:28,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:30:28,241 INFO L93 Difference]: Finished difference Result 205 states and 550 transitions. [2021-04-15 03:30:28,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-04-15 03:30:28,242 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-04-15 03:30:28,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:30:28,245 INFO L225 Difference]: With dead ends: 205 [2021-04-15 03:30:28,245 INFO L226 Difference]: Without dead ends: 205 [2021-04-15 03:30:28,246 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 39.1ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-04-15 03:30:28,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-04-15 03:30:28,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 136. [2021-04-15 03:30:28,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 2.837037037037037) internal successors, (383), 135 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:30:28,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 383 transitions. [2021-04-15 03:30:28,253 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 383 transitions. Word has length 18 [2021-04-15 03:30:28,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:30:28,253 INFO L480 AbstractCegarLoop]: Abstraction has 136 states and 383 transitions. [2021-04-15 03:30:28,254 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:30:28,254 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 383 transitions. [2021-04-15 03:30:28,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 03:30:28,254 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:30:28,254 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 03:30:28,468 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:30:28,468 INFO L428 AbstractCegarLoop]: === Iteration 7 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 03:30:28,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:30:28,469 INFO L82 PathProgramCache]: Analyzing trace with hash -141666181, now seen corresponding path program 2 times [2021-04-15 03:30:28,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:30:28,469 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260148175] [2021-04-15 03:30:28,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:30:28,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:30:28,573 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:30:28,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260148175] [2021-04-15 03:30:28,573 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 03:30:28,573 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-04-15 03:30:28,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944740461] [2021-04-15 03:30:28,574 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-04-15 03:30:28,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:30:28,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-04-15 03:30:28,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-04-15 03:30:28,575 INFO L87 Difference]: Start difference. First operand 136 states and 383 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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 03:30:28,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:30:28,696 INFO L93 Difference]: Finished difference Result 253 states and 641 transitions. [2021-04-15 03:30:28,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-04-15 03:30:28,697 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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 03:30:28,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:30:28,699 INFO L225 Difference]: With dead ends: 253 [2021-04-15 03:30:28,699 INFO L226 Difference]: Without dead ends: 244 [2021-04-15 03:30:28,699 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 68.1ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-04-15 03:30:28,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-04-15 03:30:28,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 160. [2021-04-15 03:30:28,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 2.811320754716981) internal successors, (447), 159 states have internal predecessors, (447), 0 states have call successors, (0), 0 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 03:30:28,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 447 transitions. [2021-04-15 03:30:28,711 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 447 transitions. Word has length 18 [2021-04-15 03:30:28,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:30:28,711 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 447 transitions. [2021-04-15 03:30:28,711 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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 03:30:28,711 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 447 transitions. [2021-04-15 03:30:28,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 03:30:28,712 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:30:28,712 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 03:30:28,712 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-04-15 03:30:28,713 INFO L428 AbstractCegarLoop]: === Iteration 8 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 03:30:28,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:30:28,713 INFO L82 PathProgramCache]: Analyzing trace with hash -2044687976, now seen corresponding path program 3 times [2021-04-15 03:30:28,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:30:28,713 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379243424] [2021-04-15 03:30:28,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:30:28,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:30:28,788 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:30:28,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379243424] [2021-04-15 03:30:28,789 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 03:30:28,789 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-04-15 03:30:28,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502392874] [2021-04-15 03:30:28,789 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-04-15 03:30:28,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:30:28,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-04-15 03:30:28,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-04-15 03:30:28,790 INFO L87 Difference]: Start difference. First operand 160 states and 447 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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 03:30:28,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:30:28,861 INFO L93 Difference]: Finished difference Result 211 states and 560 transitions. [2021-04-15 03:30:28,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-04-15 03:30:28,861 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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 03:30:28,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:30:28,863 INFO L225 Difference]: With dead ends: 211 [2021-04-15 03:30:28,863 INFO L226 Difference]: Without dead ends: 208 [2021-04-15 03:30:28,864 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 39.4ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-04-15 03:30:28,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-04-15 03:30:28,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 160. [2021-04-15 03:30:28,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 2.792452830188679) internal successors, (444), 159 states have internal predecessors, (444), 0 states have call successors, (0), 0 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 03:30:28,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 444 transitions. [2021-04-15 03:30:28,871 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 444 transitions. Word has length 18 [2021-04-15 03:30:28,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:30:28,871 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 444 transitions. [2021-04-15 03:30:28,871 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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 03:30:28,872 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 444 transitions. [2021-04-15 03:30:28,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 03:30:28,872 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:30:28,873 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 03:30:28,873 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-04-15 03:30:28,873 INFO L428 AbstractCegarLoop]: === Iteration 9 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 03:30:28,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:30:28,873 INFO L82 PathProgramCache]: Analyzing trace with hash 1877852891, now seen corresponding path program 3 times [2021-04-15 03:30:28,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:30:28,874 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513204129] [2021-04-15 03:30:28,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:30:28,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:30:28,915 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:30:28,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513204129] [2021-04-15 03:30:28,915 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 03:30:28,915 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-04-15 03:30:28,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127192920] [2021-04-15 03:30:28,916 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-04-15 03:30:28,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:30:28,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-04-15 03:30:28,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-04-15 03:30:28,917 INFO L87 Difference]: Start difference. First operand 160 states and 444 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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 03:30:28,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:30:28,991 INFO L93 Difference]: Finished difference Result 190 states and 515 transitions. [2021-04-15 03:30:28,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-04-15 03:30:28,992 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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 03:30:28,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:30:28,994 INFO L225 Difference]: With dead ends: 190 [2021-04-15 03:30:28,994 INFO L226 Difference]: Without dead ends: 190 [2021-04-15 03:30:28,995 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.9ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-04-15 03:30:28,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-04-15 03:30:28,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 142. [2021-04-15 03:30:29,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.8085106382978724) internal successors, (396), 141 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:30:29,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 396 transitions. [2021-04-15 03:30:29,002 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 396 transitions. Word has length 18 [2021-04-15 03:30:29,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:30:29,007 INFO L480 AbstractCegarLoop]: Abstraction has 142 states and 396 transitions. [2021-04-15 03:30:29,007 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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 03:30:29,007 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 396 transitions. [2021-04-15 03:30:29,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 03:30:29,008 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:30:29,008 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 03:30:29,008 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-04-15 03:30:29,008 INFO L428 AbstractCegarLoop]: === Iteration 10 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 03:30:29,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:30:29,009 INFO L82 PathProgramCache]: Analyzing trace with hash -663824830, now seen corresponding path program 4 times [2021-04-15 03:30:29,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:30:29,009 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763411525] [2021-04-15 03:30:29,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:30:29,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:30:29,055 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:30:29,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763411525] [2021-04-15 03:30:29,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291095608] [2021-04-15 03:30:29,056 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 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 03:30:29,085 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 03:30:29,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:30:29,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 4 conjunts are in the unsatisfiable core [2021-04-15 03:30:29,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:30:29,178 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:30:29,179 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:30:29,179 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-04-15 03:30:29,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312784205] [2021-04-15 03:30:29,180 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 03:30:29,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:30:29,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 03:30:29,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-04-15 03:30:29,181 INFO L87 Difference]: Start difference. First operand 142 states and 396 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:30:29,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:30:29,230 INFO L93 Difference]: Finished difference Result 193 states and 511 transitions. [2021-04-15 03:30:29,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-04-15 03:30:29,231 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-04-15 03:30:29,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:30:29,232 INFO L225 Difference]: With dead ends: 193 [2021-04-15 03:30:29,232 INFO L226 Difference]: Without dead ends: 193 [2021-04-15 03:30:29,233 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 33.9ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-04-15 03:30:29,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-04-15 03:30:29,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 142. [2021-04-15 03:30:29,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.8085106382978724) internal successors, (396), 141 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:30:29,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 396 transitions. [2021-04-15 03:30:29,239 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 396 transitions. Word has length 18 [2021-04-15 03:30:29,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:30:29,239 INFO L480 AbstractCegarLoop]: Abstraction has 142 states and 396 transitions. [2021-04-15 03:30:29,239 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:30:29,239 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 396 transitions. [2021-04-15 03:30:29,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 03:30:29,240 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:30:29,240 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 03:30:29,464 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-04-15 03:30:29,465 INFO L428 AbstractCegarLoop]: === Iteration 11 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 03:30:29,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:30:29,465 INFO L82 PathProgramCache]: Analyzing trace with hash 810916037, now seen corresponding path program 4 times [2021-04-15 03:30:29,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:30:29,465 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546389573] [2021-04-15 03:30:29,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:30:29,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:30:29,490 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:30:29,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546389573] [2021-04-15 03:30:29,491 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 03:30:29,491 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-04-15 03:30:29,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584107795] [2021-04-15 03:30:29,491 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-04-15 03:30:29,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:30:29,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-04-15 03:30:29,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-04-15 03:30:29,492 INFO L87 Difference]: Start difference. First operand 142 states and 396 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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 03:30:29,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:30:29,571 INFO L93 Difference]: Finished difference Result 197 states and 512 transitions. [2021-04-15 03:30:29,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-04-15 03:30:29,572 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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 03:30:29,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:30:29,573 INFO L225 Difference]: With dead ends: 197 [2021-04-15 03:30:29,573 INFO L226 Difference]: Without dead ends: 188 [2021-04-15 03:30:29,573 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 30.4ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-04-15 03:30:29,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-04-15 03:30:29,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 164. [2021-04-15 03:30:29,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 2.791411042944785) internal successors, (455), 163 states have internal predecessors, (455), 0 states have call successors, (0), 0 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 03:30:29,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 455 transitions. [2021-04-15 03:30:29,579 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 455 transitions. Word has length 18 [2021-04-15 03:30:29,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:30:29,580 INFO L480 AbstractCegarLoop]: Abstraction has 164 states and 455 transitions. [2021-04-15 03:30:29,580 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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 03:30:29,580 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 455 transitions. [2021-04-15 03:30:29,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 03:30:29,581 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:30:29,581 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 03:30:29,581 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-04-15 03:30:29,581 INFO L428 AbstractCegarLoop]: === Iteration 12 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 03:30:29,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:30:29,582 INFO L82 PathProgramCache]: Analyzing trace with hash -951885686, now seen corresponding path program 5 times [2021-04-15 03:30:29,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:30:29,582 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765773287] [2021-04-15 03:30:29,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:30:29,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:30:29,604 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:30:29,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765773287] [2021-04-15 03:30:29,604 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 03:30:29,604 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-04-15 03:30:29,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610554329] [2021-04-15 03:30:29,605 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-04-15 03:30:29,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:30:29,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-04-15 03:30:29,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-04-15 03:30:29,605 INFO L87 Difference]: Start difference. First operand 164 states and 455 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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 03:30:29,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:30:29,693 INFO L93 Difference]: Finished difference Result 248 states and 641 transitions. [2021-04-15 03:30:29,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-04-15 03:30:29,694 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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 03:30:29,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:30:29,697 INFO L225 Difference]: With dead ends: 248 [2021-04-15 03:30:29,697 INFO L226 Difference]: Without dead ends: 245 [2021-04-15 03:30:29,698 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 33.7ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-04-15 03:30:29,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-04-15 03:30:29,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 164. [2021-04-15 03:30:29,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 2.773006134969325) internal successors, (452), 163 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:30:29,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 452 transitions. [2021-04-15 03:30:29,704 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 452 transitions. Word has length 18 [2021-04-15 03:30:29,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:30:29,704 INFO L480 AbstractCegarLoop]: Abstraction has 164 states and 452 transitions. [2021-04-15 03:30:29,704 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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 03:30:29,704 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 452 transitions. [2021-04-15 03:30:29,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 03:30:29,706 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:30:29,706 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 03:30:29,706 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-04-15 03:30:29,707 INFO L428 AbstractCegarLoop]: === Iteration 13 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 03:30:29,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:30:29,707 INFO L82 PathProgramCache]: Analyzing trace with hash -1324312115, now seen corresponding path program 5 times [2021-04-15 03:30:29,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:30:29,707 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960865724] [2021-04-15 03:30:29,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:30:29,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:30:29,751 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:30:29,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960865724] [2021-04-15 03:30:29,751 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 03:30:29,751 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-04-15 03:30:29,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173568978] [2021-04-15 03:30:29,755 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-04-15 03:30:29,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:30:29,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-04-15 03:30:29,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-04-15 03:30:29,757 INFO L87 Difference]: Start difference. First operand 164 states and 452 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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 03:30:29,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:30:29,809 INFO L93 Difference]: Finished difference Result 190 states and 503 transitions. [2021-04-15 03:30:29,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-04-15 03:30:29,809 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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 03:30:29,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:30:29,811 INFO L225 Difference]: With dead ends: 190 [2021-04-15 03:30:29,811 INFO L226 Difference]: Without dead ends: 190 [2021-04-15 03:30:29,812 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.5ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-04-15 03:30:29,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-04-15 03:30:29,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 161. [2021-04-15 03:30:29,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 2.775) internal successors, (444), 160 states have internal predecessors, (444), 0 states have call successors, (0), 0 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 03:30:29,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 444 transitions. [2021-04-15 03:30:29,818 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 444 transitions. Word has length 18 [2021-04-15 03:30:29,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:30:29,818 INFO L480 AbstractCegarLoop]: Abstraction has 161 states and 444 transitions. [2021-04-15 03:30:29,818 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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 03:30:29,818 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 444 transitions. [2021-04-15 03:30:29,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 03:30:29,821 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:30:29,821 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 03:30:29,822 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-04-15 03:30:29,822 INFO L428 AbstractCegarLoop]: === Iteration 14 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 03:30:29,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:30:29,822 INFO L82 PathProgramCache]: Analyzing trace with hash 11936556, now seen corresponding path program 6 times [2021-04-15 03:30:29,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:30:29,823 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607231482] [2021-04-15 03:30:29,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:30:29,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:30:29,862 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:30:29,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607231482] [2021-04-15 03:30:29,863 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 03:30:29,863 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-04-15 03:30:29,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815915781] [2021-04-15 03:30:29,863 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-04-15 03:30:29,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:30:29,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-04-15 03:30:29,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-04-15 03:30:29,864 INFO L87 Difference]: Start difference. First operand 161 states and 444 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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 03:30:29,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:30:29,931 INFO L93 Difference]: Finished difference Result 164 states and 446 transitions. [2021-04-15 03:30:29,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 03:30:29,932 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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 03:30:29,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:30:29,933 INFO L225 Difference]: With dead ends: 164 [2021-04-15 03:30:29,933 INFO L226 Difference]: Without dead ends: 160 [2021-04-15 03:30:29,934 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 33.5ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-04-15 03:30:29,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-04-15 03:30:29,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2021-04-15 03:30:29,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 2.779874213836478) internal successors, (442), 159 states have internal predecessors, (442), 0 states have call successors, (0), 0 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 03:30:29,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 442 transitions. [2021-04-15 03:30:29,939 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 442 transitions. Word has length 18 [2021-04-15 03:30:29,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:30:29,939 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 442 transitions. [2021-04-15 03:30:29,939 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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 03:30:29,940 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 442 transitions. [2021-04-15 03:30:29,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 03:30:29,941 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:30:29,941 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 03:30:29,941 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-04-15 03:30:29,942 INFO L428 AbstractCegarLoop]: === Iteration 15 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 03:30:29,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:30:29,942 INFO L82 PathProgramCache]: Analyzing trace with hash 459545933, now seen corresponding path program 6 times [2021-04-15 03:30:29,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:30:29,942 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795166095] [2021-04-15 03:30:29,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:30:29,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:30:29,975 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:30:29,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795166095] [2021-04-15 03:30:29,975 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 03:30:29,975 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-04-15 03:30:29,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112269925] [2021-04-15 03:30:29,976 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-04-15 03:30:29,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:30:29,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-04-15 03:30:29,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-04-15 03:30:29,977 INFO L87 Difference]: Start difference. First operand 160 states and 442 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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 03:30:30,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:30:30,027 INFO L93 Difference]: Finished difference Result 153 states and 422 transitions. [2021-04-15 03:30:30,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-04-15 03:30:30,027 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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 03:30:30,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:30:30,028 INFO L225 Difference]: With dead ends: 153 [2021-04-15 03:30:30,028 INFO L226 Difference]: Without dead ends: 153 [2021-04-15 03:30:30,030 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.2ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-04-15 03:30:30,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-04-15 03:30:30,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 135. [2021-04-15 03:30:30,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 2.791044776119403) internal successors, (374), 134 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 03:30:30,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 374 transitions. [2021-04-15 03:30:30,036 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 374 transitions. Word has length 18 [2021-04-15 03:30:30,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:30:30,036 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 374 transitions. [2021-04-15 03:30:30,036 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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 03:30:30,037 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 374 transitions. [2021-04-15 03:30:30,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 03:30:30,037 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:30:30,038 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 03:30:30,038 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-04-15 03:30:30,038 INFO L428 AbstractCegarLoop]: === Iteration 16 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 03:30:30,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:30:30,039 INFO L82 PathProgramCache]: Analyzing trace with hash 442648773, now seen corresponding path program 1 times [2021-04-15 03:30:30,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:30:30,039 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579646729] [2021-04-15 03:30:30,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:30:30,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:30:30,213 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 03:30:30,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579646729] [2021-04-15 03:30:30,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570247181] [2021-04-15 03:30:30,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:30:30,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:30:30,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-04-15 03:30:30,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:30:30,484 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 16 treesize of output 10 [2021-04-15 03:30:30,488 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 03:30:30,494 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 03:30:30,495 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 03:30:30,495 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:10 [2021-04-15 03:30:30,551 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 03:30:30,551 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:30:30,551 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-04-15 03:30:30,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177347779] [2021-04-15 03:30:30,552 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 03:30:30,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:30:30,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 03:30:30,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-04-15 03:30:30,553 INFO L87 Difference]: Start difference. First operand 135 states and 374 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:30:31,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:30:31,061 INFO L93 Difference]: Finished difference Result 382 states and 1086 transitions. [2021-04-15 03:30:31,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 03:30:31,061 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 03:30:31,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:30:31,065 INFO L225 Difference]: With dead ends: 382 [2021-04-15 03:30:31,066 INFO L226 Difference]: Without dead ends: 372 [2021-04-15 03:30:31,066 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 310.5ms TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2021-04-15 03:30:31,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2021-04-15 03:30:31,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 186. [2021-04-15 03:30:31,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.8162162162162163) internal successors, (521), 185 states have internal predecessors, (521), 0 states have call successors, (0), 0 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 03:30:31,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 521 transitions. [2021-04-15 03:30:31,077 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 521 transitions. Word has length 20 [2021-04-15 03:30:31,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:30:31,078 INFO L480 AbstractCegarLoop]: Abstraction has 186 states and 521 transitions. [2021-04-15 03:30:31,078 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:30:31,078 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 521 transitions. [2021-04-15 03:30:31,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 03:30:31,079 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:30:31,079 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 03:30:31,279 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:30:31,280 INFO L428 AbstractCegarLoop]: === Iteration 17 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 03:30:31,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:30:31,281 INFO L82 PathProgramCache]: Analyzing trace with hash 600946541, now seen corresponding path program 2 times [2021-04-15 03:30:31,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:30:31,281 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136905041] [2021-04-15 03:30:31,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:30:31,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:30:31,390 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 03:30:31,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136905041] [2021-04-15 03:30:31,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942085180] [2021-04-15 03:30:31,390 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 03:30:31,428 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 03:30:31,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:30:31,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 20 conjunts are in the unsatisfiable core [2021-04-15 03:30:31,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:30:31,685 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 03:30:31,685 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-04-15 03:30:31,690 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-04-15 03:30:31,708 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 03:30:31,723 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 03:30:31,724 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:20 [2021-04-15 03:30:31,814 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 03:30:31,814 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:30:31,814 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-04-15 03:30:31,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958371900] [2021-04-15 03:30:31,815 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 03:30:31,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:30:31,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 03:30:31,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-04-15 03:30:31,816 INFO L87 Difference]: Start difference. First operand 186 states and 521 transitions. Second operand has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:30:32,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:30:32,937 INFO L93 Difference]: Finished difference Result 399 states and 1155 transitions. [2021-04-15 03:30:32,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-04-15 03:30:32,937 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 03:30:32,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:30:32,940 INFO L225 Difference]: With dead ends: 399 [2021-04-15 03:30:32,940 INFO L226 Difference]: Without dead ends: 389 [2021-04-15 03:30:32,941 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 857.9ms TimeCoverageRelationStatistics Valid=219, Invalid=1041, Unknown=0, NotChecked=0, Total=1260 [2021-04-15 03:30:32,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2021-04-15 03:30:32,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 189. [2021-04-15 03:30:32,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.8191489361702127) internal successors, (530), 188 states have internal predecessors, (530), 0 states have call successors, (0), 0 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 03:30:32,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 530 transitions. [2021-04-15 03:30:32,950 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 530 transitions. Word has length 20 [2021-04-15 03:30:32,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:30:32,950 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 530 transitions. [2021-04-15 03:30:32,951 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:30:32,951 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 530 transitions. [2021-04-15 03:30:32,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 03:30:32,951 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:30:32,951 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 03:30:33,169 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-04-15 03:30:33,169 INFO L428 AbstractCegarLoop]: === Iteration 18 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 03:30:33,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:30:33,169 INFO L82 PathProgramCache]: Analyzing trace with hash 424405109, now seen corresponding path program 3 times [2021-04-15 03:30:33,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:30:33,170 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775257675] [2021-04-15 03:30:33,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:30:33,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:30:33,306 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 03:30:33,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775257675] [2021-04-15 03:30:33,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524122818] [2021-04-15 03:30:33,307 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 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 03:30:33,342 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-04-15 03:30:33,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:30:33,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 20 conjunts are in the unsatisfiable core [2021-04-15 03:30:33,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:30:33,428 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 03:30:33,428 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-04-15 03:30:33,431 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-04-15 03:30:33,443 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 03:30:33,445 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 03:30:33,445 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-04-15 03:30:33,633 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 03:30:33,634 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:30:33,634 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-04-15 03:30:33,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241973157] [2021-04-15 03:30:33,634 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 03:30:33,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:30:33,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 03:30:33,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-04-15 03:30:33,635 INFO L87 Difference]: Start difference. First operand 189 states and 530 transitions. Second operand has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:30:34,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:30:34,649 INFO L93 Difference]: Finished difference Result 363 states and 1048 transitions. [2021-04-15 03:30:34,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-15 03:30:34,650 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 03:30:34,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:30:34,652 INFO L225 Difference]: With dead ends: 363 [2021-04-15 03:30:34,652 INFO L226 Difference]: Without dead ends: 353 [2021-04-15 03:30:34,653 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 843.9ms TimeCoverageRelationStatistics Valid=214, Invalid=976, Unknown=0, NotChecked=0, Total=1190 [2021-04-15 03:30:34,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-04-15 03:30:34,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 192. [2021-04-15 03:30:34,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 2.8219895287958114) internal successors, (539), 191 states have internal predecessors, (539), 0 states have call successors, (0), 0 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 03:30:34,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 539 transitions. [2021-04-15 03:30:34,661 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 539 transitions. Word has length 20 [2021-04-15 03:30:34,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:30:34,661 INFO L480 AbstractCegarLoop]: Abstraction has 192 states and 539 transitions. [2021-04-15 03:30:34,662 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:30:34,662 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 539 transitions. [2021-04-15 03:30:34,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 03:30:34,662 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:30:34,662 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 03:30:34,880 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:30:34,880 INFO L428 AbstractCegarLoop]: === Iteration 19 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 03:30:34,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:30:34,881 INFO L82 PathProgramCache]: Analyzing trace with hash -409333331, now seen corresponding path program 4 times [2021-04-15 03:30:34,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:30:34,881 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137993601] [2021-04-15 03:30:34,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:30:34,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:30:35,067 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 03:30:35,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137993601] [2021-04-15 03:30:35,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235523231] [2021-04-15 03:30:35,067 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:30:35,100 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 03:30:35,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:30:35,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-04-15 03:30:35,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:30:35,236 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 03:30:35,237 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-04-15 03:30:35,238 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 03:30:35,247 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 03:30:35,249 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 03:30:35,249 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-04-15 03:30:35,324 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 03:30:35,324 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:30:35,324 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-04-15 03:30:35,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489262044] [2021-04-15 03:30:35,325 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 03:30:35,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:30:35,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 03:30:35,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-04-15 03:30:35,326 INFO L87 Difference]: Start difference. First operand 192 states and 539 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:30:35,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:30:35,932 INFO L93 Difference]: Finished difference Result 310 states and 882 transitions. [2021-04-15 03:30:35,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 03:30:35,932 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 03:30:35,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:30:35,934 INFO L225 Difference]: With dead ends: 310 [2021-04-15 03:30:35,934 INFO L226 Difference]: Without dead ends: 298 [2021-04-15 03:30:35,935 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 437.7ms TimeCoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2021-04-15 03:30:35,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2021-04-15 03:30:35,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 210. [2021-04-15 03:30:35,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.875598086124402) internal successors, (601), 209 states have internal predecessors, (601), 0 states have call successors, (0), 0 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 03:30:35,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 601 transitions. [2021-04-15 03:30:35,943 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 601 transitions. Word has length 20 [2021-04-15 03:30:35,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:30:35,943 INFO L480 AbstractCegarLoop]: Abstraction has 210 states and 601 transitions. [2021-04-15 03:30:35,943 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:30:35,944 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 601 transitions. [2021-04-15 03:30:35,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 03:30:35,944 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:30:35,945 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 03:30:36,161 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:30:36,161 INFO L428 AbstractCegarLoop]: === Iteration 20 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 03:30:36,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:30:36,161 INFO L82 PathProgramCache]: Analyzing trace with hash -908838833, now seen corresponding path program 1 times [2021-04-15 03:30:36,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:30:36,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881144715] [2021-04-15 03:30:36,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:30:36,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:30:36,263 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 03:30:36,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881144715] [2021-04-15 03:30:36,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243430095] [2021-04-15 03:30:36,263 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 03:30:36,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:30:36,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-04-15 03:30:36,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:30:36,405 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 16 treesize of output 10 [2021-04-15 03:30:36,406 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 03:30:36,411 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 03:30:36,412 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 03:30:36,413 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:10 [2021-04-15 03:30:36,446 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 03:30:36,447 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:30:36,447 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-04-15 03:30:36,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777885862] [2021-04-15 03:30:36,448 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 03:30:36,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:30:36,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 03:30:36,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-04-15 03:30:36,449 INFO L87 Difference]: Start difference. First operand 210 states and 601 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:30:36,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:30:36,939 INFO L93 Difference]: Finished difference Result 423 states and 1216 transitions. [2021-04-15 03:30:36,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 03:30:36,940 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 03:30:36,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:30:36,942 INFO L225 Difference]: With dead ends: 423 [2021-04-15 03:30:36,942 INFO L226 Difference]: Without dead ends: 414 [2021-04-15 03:30:36,943 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 242.8ms TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2021-04-15 03:30:36,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-04-15 03:30:36,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 216. [2021-04-15 03:30:36,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 2.8883720930232557) internal successors, (621), 215 states have internal predecessors, (621), 0 states have call successors, (0), 0 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 03:30:36,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 621 transitions. [2021-04-15 03:30:36,951 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 621 transitions. Word has length 20 [2021-04-15 03:30:36,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:30:36,951 INFO L480 AbstractCegarLoop]: Abstraction has 216 states and 621 transitions. [2021-04-15 03:30:36,951 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:30:36,951 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 621 transitions. [2021-04-15 03:30:36,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 03:30:36,952 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:30:36,952 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 03:30:37,164 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-04-15 03:30:37,165 INFO L428 AbstractCegarLoop]: === Iteration 21 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 03:30:37,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:30:37,165 INFO L82 PathProgramCache]: Analyzing trace with hash -1199871497, now seen corresponding path program 2 times [2021-04-15 03:30:37,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:30:37,165 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471007766] [2021-04-15 03:30:37,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:30:37,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:30:37,303 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 03:30:37,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471007766] [2021-04-15 03:30:37,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659779087] [2021-04-15 03:30:37,303 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 03:30:37,336 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 03:30:37,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:30:37,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-04-15 03:30:37,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:30:37,547 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 03:30:37,548 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-04-15 03:30:37,553 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-04-15 03:30:37,567 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 03:30:37,573 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 03:30:37,573 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:35 [2021-04-15 03:30:37,665 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 03:30:37,665 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:30:37,665 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-04-15 03:30:37,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307993808] [2021-04-15 03:30:37,665 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 03:30:37,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:30:37,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 03:30:37,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-04-15 03:30:37,666 INFO L87 Difference]: Start difference. First operand 216 states and 621 transitions. Second operand has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 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 03:30:38,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:30:38,435 INFO L93 Difference]: Finished difference Result 360 states and 1047 transitions. [2021-04-15 03:30:38,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 03:30:38,435 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 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 20 [2021-04-15 03:30:38,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:30:38,437 INFO L225 Difference]: With dead ends: 360 [2021-04-15 03:30:38,437 INFO L226 Difference]: Without dead ends: 351 [2021-04-15 03:30:38,438 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 563.5ms TimeCoverageRelationStatistics Valid=119, Invalid=531, Unknown=0, NotChecked=0, Total=650 [2021-04-15 03:30:38,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2021-04-15 03:30:38,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 219. [2021-04-15 03:30:38,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 2.8944954128440368) internal successors, (631), 218 states have internal predecessors, (631), 0 states have call successors, (0), 0 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 03:30:38,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 631 transitions. [2021-04-15 03:30:38,444 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 631 transitions. Word has length 20 [2021-04-15 03:30:38,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:30:38,445 INFO L480 AbstractCegarLoop]: Abstraction has 219 states and 631 transitions. [2021-04-15 03:30:38,445 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 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 03:30:38,445 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 631 transitions. [2021-04-15 03:30:38,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 03:30:38,446 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:30:38,446 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 03:30:38,660 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:30:38,661 INFO L428 AbstractCegarLoop]: === Iteration 22 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 03:30:38,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:30:38,661 INFO L82 PathProgramCache]: Analyzing trace with hash 2066945939, now seen corresponding path program 3 times [2021-04-15 03:30:38,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:30:38,661 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743340539] [2021-04-15 03:30:38,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:30:38,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:30:38,764 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 03:30:38,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743340539] [2021-04-15 03:30:38,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772095447] [2021-04-15 03:30:38,764 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:30:38,800 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-04-15 03:30:38,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:30:38,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-04-15 03:30:38,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:30:38,913 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 03:30:38,914 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-04-15 03:30:38,916 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-04-15 03:30:38,931 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 03:30:38,936 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 03:30:38,936 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:38 [2021-04-15 03:30:39,081 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 03:30:39,081 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:30:39,081 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-04-15 03:30:39,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916688482] [2021-04-15 03:30:39,082 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 03:30:39,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:30:39,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 03:30:39,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-04-15 03:30:39,083 INFO L87 Difference]: Start difference. First operand 219 states and 631 transitions. Second operand has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 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 03:30:39,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:30:39,755 INFO L93 Difference]: Finished difference Result 343 states and 998 transitions. [2021-04-15 03:30:39,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 03:30:39,755 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 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 20 [2021-04-15 03:30:39,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:30:39,757 INFO L225 Difference]: With dead ends: 343 [2021-04-15 03:30:39,757 INFO L226 Difference]: Without dead ends: 334 [2021-04-15 03:30:39,758 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 507.2ms TimeCoverageRelationStatistics Valid=116, Invalid=436, Unknown=0, NotChecked=0, Total=552 [2021-04-15 03:30:39,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2021-04-15 03:30:39,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 222. [2021-04-15 03:30:39,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 2.9004524886877827) internal successors, (641), 221 states have internal predecessors, (641), 0 states have call successors, (0), 0 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 03:30:39,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 641 transitions. [2021-04-15 03:30:39,766 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 641 transitions. Word has length 20 [2021-04-15 03:30:39,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:30:39,768 INFO L480 AbstractCegarLoop]: Abstraction has 222 states and 641 transitions. [2021-04-15 03:30:39,768 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 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 03:30:39,768 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 641 transitions. [2021-04-15 03:30:39,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 03:30:39,769 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:30:39,769 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 03:30:39,984 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-04-15 03:30:39,985 INFO L428 AbstractCegarLoop]: === Iteration 23 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 03:30:39,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:30:39,985 INFO L82 PathProgramCache]: Analyzing trace with hash -1904435179, now seen corresponding path program 4 times [2021-04-15 03:30:39,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:30:39,985 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972888395] [2021-04-15 03:30:39,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:30:39,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:30:40,070 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 03:30:40,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972888395] [2021-04-15 03:30:40,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623082336] [2021-04-15 03:30:40,071 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:30:40,102 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 03:30:40,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:30:40,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-04-15 03:30:40,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:30:40,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 03:30:40,216 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-04-15 03:30:40,217 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 03:30:40,225 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 03:30:40,229 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 03:30:40,229 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-04-15 03:30:40,294 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 03:30:40,294 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:30:40,294 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-04-15 03:30:40,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938770412] [2021-04-15 03:30:40,294 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 03:30:40,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:30:40,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 03:30:40,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-04-15 03:30:40,295 INFO L87 Difference]: Start difference. First operand 222 states and 641 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:30:40,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:30:40,582 INFO L93 Difference]: Finished difference Result 318 states and 927 transitions. [2021-04-15 03:30:40,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 03:30:40,583 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 03:30:40,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:30:40,584 INFO L225 Difference]: With dead ends: 318 [2021-04-15 03:30:40,585 INFO L226 Difference]: Without dead ends: 307 [2021-04-15 03:30:40,585 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 253.4ms TimeCoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2021-04-15 03:30:40,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2021-04-15 03:30:40,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 224. [2021-04-15 03:30:40,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.905829596412556) internal successors, (648), 223 states have internal predecessors, (648), 0 states have call successors, (0), 0 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 03:30:40,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 648 transitions. [2021-04-15 03:30:40,593 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 648 transitions. Word has length 20 [2021-04-15 03:30:40,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:30:40,593 INFO L480 AbstractCegarLoop]: Abstraction has 224 states and 648 transitions. [2021-04-15 03:30:40,593 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:30:40,593 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 648 transitions. [2021-04-15 03:30:40,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 03:30:40,594 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:30:40,594 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 03:30:40,818 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-04-15 03:30:40,819 INFO L428 AbstractCegarLoop]: === Iteration 24 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 03:30:40,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:30:40,819 INFO L82 PathProgramCache]: Analyzing trace with hash -453703043, now seen corresponding path program 5 times [2021-04-15 03:30:40,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:30:40,819 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045961514] [2021-04-15 03:30:40,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:30:40,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:30:40,944 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:30:40,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045961514] [2021-04-15 03:30:40,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909501766] [2021-04-15 03:30:40,944 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:30:40,978 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 03:30:40,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:30:40,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-04-15 03:30:40,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:30:41,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 03:30:41,134 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-04-15 03:30:41,136 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 03:30:41,144 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 03:30:41,146 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 03:30:41,146 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-04-15 03:30:41,180 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 03:30:41,180 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:30:41,180 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-04-15 03:30:41,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923521344] [2021-04-15 03:30:41,181 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 03:30:41,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:30:41,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 03:30:41,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-04-15 03:30:41,181 INFO L87 Difference]: Start difference. First operand 224 states and 648 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 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 03:30:41,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:30:41,507 INFO L93 Difference]: Finished difference Result 328 states and 946 transitions. [2021-04-15 03:30:41,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 03:30:41,507 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 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 20 [2021-04-15 03:30:41,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:30:41,509 INFO L225 Difference]: With dead ends: 328 [2021-04-15 03:30:41,509 INFO L226 Difference]: Without dead ends: 318 [2021-04-15 03:30:41,510 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 244.3ms TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-04-15 03:30:41,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2021-04-15 03:30:41,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 224. [2021-04-15 03:30:41,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.905829596412556) internal successors, (648), 223 states have internal predecessors, (648), 0 states have call successors, (0), 0 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 03:30:41,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 648 transitions. [2021-04-15 03:30:41,517 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 648 transitions. Word has length 20 [2021-04-15 03:30:41,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:30:41,517 INFO L480 AbstractCegarLoop]: Abstraction has 224 states and 648 transitions. [2021-04-15 03:30:41,517 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 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 03:30:41,518 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 648 transitions. [2021-04-15 03:30:41,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 03:30:41,518 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:30:41,518 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 03:30:41,740 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:30:41,741 INFO L428 AbstractCegarLoop]: === Iteration 25 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 03:30:41,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:30:41,741 INFO L82 PathProgramCache]: Analyzing trace with hash -236278157, now seen corresponding path program 6 times [2021-04-15 03:30:41,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:30:41,741 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862079173] [2021-04-15 03:30:41,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:30:41,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:30:41,870 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 03:30:41,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862079173] [2021-04-15 03:30:41,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502207227] [2021-04-15 03:30:41,871 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:30:41,903 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-04-15 03:30:41,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:30:41,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 20 conjunts are in the unsatisfiable core [2021-04-15 03:30:41,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:30:41,984 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 03:30:41,984 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-04-15 03:30:41,986 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-04-15 03:30:41,998 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 03:30:42,001 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 03:30:42,001 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-04-15 03:30:42,185 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 03:30:42,186 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:30:42,186 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-04-15 03:30:42,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187232090] [2021-04-15 03:30:42,186 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 03:30:42,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:30:42,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 03:30:42,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-04-15 03:30:42,188 INFO L87 Difference]: Start difference. First operand 224 states and 648 transitions. Second operand has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:30:43,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:30:43,217 INFO L93 Difference]: Finished difference Result 462 states and 1347 transitions. [2021-04-15 03:30:43,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-04-15 03:30:43,221 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 03:30:43,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:30:43,224 INFO L225 Difference]: With dead ends: 462 [2021-04-15 03:30:43,224 INFO L226 Difference]: Without dead ends: 442 [2021-04-15 03:30:43,225 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 810.5ms TimeCoverageRelationStatistics Valid=231, Invalid=959, Unknown=0, NotChecked=0, Total=1190 [2021-04-15 03:30:43,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2021-04-15 03:30:43,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 235. [2021-04-15 03:30:43,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 2.965811965811966) internal successors, (694), 234 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 03:30:43,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 694 transitions. [2021-04-15 03:30:43,242 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 694 transitions. Word has length 20 [2021-04-15 03:30:43,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:30:43,242 INFO L480 AbstractCegarLoop]: Abstraction has 235 states and 694 transitions. [2021-04-15 03:30:43,243 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:30:43,243 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 694 transitions. [2021-04-15 03:30:43,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 03:30:43,244 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:30:43,244 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 03:30:43,460 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-04-15 03:30:43,461 INFO L428 AbstractCegarLoop]: === Iteration 26 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 03:30:43,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:30:43,461 INFO L82 PathProgramCache]: Analyzing trace with hash 188465799, now seen corresponding path program 5 times [2021-04-15 03:30:43,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:30:43,462 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709433032] [2021-04-15 03:30:43,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:30:43,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:30:43,565 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 03:30:43,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709433032] [2021-04-15 03:30:43,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151885094] [2021-04-15 03:30:43,566 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:30:43,602 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 03:30:43,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:30:43,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-04-15 03:30:43,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:30:43,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 03:30:43,768 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-04-15 03:30:43,769 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 03:30:43,777 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 03:30:43,779 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 03:30:43,779 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-04-15 03:30:43,812 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 03:30:43,813 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:30:43,813 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-04-15 03:30:43,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643329965] [2021-04-15 03:30:43,813 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 03:30:43,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:30:43,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 03:30:43,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-04-15 03:30:43,814 INFO L87 Difference]: Start difference. First operand 235 states and 694 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 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 03:30:44,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:30:44,075 INFO L93 Difference]: Finished difference Result 327 states and 955 transitions. [2021-04-15 03:30:44,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 03:30:44,076 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 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 20 [2021-04-15 03:30:44,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:30:44,077 INFO L225 Difference]: With dead ends: 327 [2021-04-15 03:30:44,077 INFO L226 Difference]: Without dead ends: 318 [2021-04-15 03:30:44,078 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 214.7ms TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-04-15 03:30:44,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2021-04-15 03:30:44,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 238. [2021-04-15 03:30:44,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 2.970464135021097) internal successors, (704), 237 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:30:44,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 704 transitions. [2021-04-15 03:30:44,086 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 704 transitions. Word has length 20 [2021-04-15 03:30:44,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:30:44,086 INFO L480 AbstractCegarLoop]: Abstraction has 238 states and 704 transitions. [2021-04-15 03:30:44,086 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 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 03:30:44,086 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 704 transitions. [2021-04-15 03:30:44,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 03:30:44,087 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:30:44,087 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 03:30:44,313 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:30:44,313 INFO L428 AbstractCegarLoop]: === Iteration 27 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 03:30:44,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:30:44,314 INFO L82 PathProgramCache]: Analyzing trace with hash -839684061, now seen corresponding path program 6 times [2021-04-15 03:30:44,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:30:44,314 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845334484] [2021-04-15 03:30:44,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:30:44,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:30:44,397 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 03:30:44,397 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845334484] [2021-04-15 03:30:44,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271982573] [2021-04-15 03:30:44,398 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:30:44,422 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-04-15 03:30:44,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:30:44,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-04-15 03:30:44,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:30:44,538 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 03:30:44,539 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-04-15 03:30:44,542 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-04-15 03:30:44,558 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 03:30:44,565 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 03:30:44,565 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:38 [2021-04-15 03:30:44,692 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 03:30:44,692 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:30:44,692 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-04-15 03:30:44,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547735381] [2021-04-15 03:30:44,692 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 03:30:44,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:30:44,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 03:30:44,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-04-15 03:30:44,693 INFO L87 Difference]: Start difference. First operand 238 states and 704 transitions. Second operand has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 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 03:30:45,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:30:45,286 INFO L93 Difference]: Finished difference Result 341 states and 1001 transitions. [2021-04-15 03:30:45,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 03:30:45,286 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 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 20 [2021-04-15 03:30:45,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:30:45,287 INFO L225 Difference]: With dead ends: 341 [2021-04-15 03:30:45,288 INFO L226 Difference]: Without dead ends: 332 [2021-04-15 03:30:45,288 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 537.4ms TimeCoverageRelationStatistics Valid=107, Invalid=399, Unknown=0, NotChecked=0, Total=506 [2021-04-15 03:30:45,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2021-04-15 03:30:45,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 241. [2021-04-15 03:30:45,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.975) internal successors, (714), 240 states have internal predecessors, (714), 0 states have call successors, (0), 0 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 03:30:45,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 714 transitions. [2021-04-15 03:30:45,295 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 714 transitions. Word has length 20 [2021-04-15 03:30:45,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:30:45,295 INFO L480 AbstractCegarLoop]: Abstraction has 241 states and 714 transitions. [2021-04-15 03:30:45,295 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 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 03:30:45,295 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 714 transitions. [2021-04-15 03:30:45,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 03:30:45,296 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:30:45,296 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 03:30:45,520 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-04-15 03:30:45,521 INFO L428 AbstractCegarLoop]: === Iteration 28 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 03:30:45,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:30:45,521 INFO L82 PathProgramCache]: Analyzing trace with hash -516097883, now seen corresponding path program 7 times [2021-04-15 03:30:45,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:30:45,522 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930359657] [2021-04-15 03:30:45,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:30:45,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:30:45,598 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 03:30:45,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930359657] [2021-04-15 03:30:45,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561496235] [2021-04-15 03:30:45,599 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:30:45,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:30:45,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-04-15 03:30:45,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:30:45,723 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 03:30:45,724 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-04-15 03:30:45,725 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 03:30:45,734 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 03:30:45,736 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 03:30:45,736 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-04-15 03:30:45,787 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 03:30:45,787 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:30:45,787 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-04-15 03:30:45,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674986027] [2021-04-15 03:30:45,788 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 03:30:45,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:30:45,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 03:30:45,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-04-15 03:30:45,788 INFO L87 Difference]: Start difference. First operand 241 states and 714 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:30:45,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:30:45,997 INFO L93 Difference]: Finished difference Result 310 states and 911 transitions. [2021-04-15 03:30:45,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-04-15 03:30:45,997 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 03:30:45,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:30:45,998 INFO L225 Difference]: With dead ends: 310 [2021-04-15 03:30:45,999 INFO L226 Difference]: Without dead ends: 299 [2021-04-15 03:30:45,999 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 184.2ms TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-04-15 03:30:45,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2021-04-15 03:30:46,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 235. [2021-04-15 03:30:46,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 2.965811965811966) internal successors, (694), 234 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 03:30:46,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 694 transitions. [2021-04-15 03:30:46,005 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 694 transitions. Word has length 20 [2021-04-15 03:30:46,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:30:46,005 INFO L480 AbstractCegarLoop]: Abstraction has 235 states and 694 transitions. [2021-04-15 03:30:46,005 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:30:46,005 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 694 transitions. [2021-04-15 03:30:46,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 03:30:46,006 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:30:46,006 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 03:30:46,220 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:30:46,221 INFO L428 AbstractCegarLoop]: === Iteration 29 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 03:30:46,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:30:46,221 INFO L82 PathProgramCache]: Analyzing trace with hash 1628624025, now seen corresponding path program 7 times [2021-04-15 03:30:46,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:30:46,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989088310] [2021-04-15 03:30:46,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:30:46,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:30:46,342 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 03:30:46,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989088310] [2021-04-15 03:30:46,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825352928] [2021-04-15 03:30:46,343 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 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 03:30:46,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:30:46,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-04-15 03:30:46,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:30:46,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 03:30:46,426 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-04-15 03:30:46,427 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 03:30:46,435 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 03:30:46,437 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 03:30:46,437 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-04-15 03:30:46,492 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 03:30:46,492 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:30:46,492 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-04-15 03:30:46,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826615331] [2021-04-15 03:30:46,493 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 03:30:46,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:30:46,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 03:30:46,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-04-15 03:30:46,494 INFO L87 Difference]: Start difference. First operand 235 states and 694 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 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 03:30:46,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:30:46,783 INFO L93 Difference]: Finished difference Result 350 states and 1025 transitions. [2021-04-15 03:30:46,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 03:30:46,784 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 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 20 [2021-04-15 03:30:46,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:30:46,786 INFO L225 Difference]: With dead ends: 350 [2021-04-15 03:30:46,786 INFO L226 Difference]: Without dead ends: 340 [2021-04-15 03:30:46,786 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 220.8ms TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-04-15 03:30:46,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2021-04-15 03:30:46,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 246. [2021-04-15 03:30:46,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 3.012244897959184) internal successors, (738), 245 states have internal predecessors, (738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:30:46,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 738 transitions. [2021-04-15 03:30:46,806 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 738 transitions. Word has length 20 [2021-04-15 03:30:46,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:30:46,806 INFO L480 AbstractCegarLoop]: Abstraction has 246 states and 738 transitions. [2021-04-15 03:30:46,806 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 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 03:30:46,806 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 738 transitions. [2021-04-15 03:30:46,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 03:30:46,807 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:30:46,807 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 03:30:47,016 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-04-15 03:30:47,017 INFO L428 AbstractCegarLoop]: === Iteration 30 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 03:30:47,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:30:47,017 INFO L82 PathProgramCache]: Analyzing trace with hash -162237149, now seen corresponding path program 8 times [2021-04-15 03:30:47,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:30:47,017 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149076702] [2021-04-15 03:30:47,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:30:47,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:30:47,123 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 03:30:47,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149076702] [2021-04-15 03:30:47,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980377591] [2021-04-15 03:30:47,123 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 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 03:30:47,149 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 03:30:47,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:30:47,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 22 conjunts are in the unsatisfiable core [2021-04-15 03:30:47,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:30:47,218 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 03:30:47,219 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-04-15 03:30:47,220 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-04-15 03:30:47,237 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 03:30:47,243 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 03:30:47,243 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:26 [2021-04-15 03:30:47,357 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 03:30:47,357 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:30:47,357 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-04-15 03:30:47,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195070557] [2021-04-15 03:30:47,358 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 03:30:47,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:30:47,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 03:30:47,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-04-15 03:30:47,358 INFO L87 Difference]: Start difference. First operand 246 states and 738 transitions. Second operand has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 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 03:30:47,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:30:47,743 INFO L93 Difference]: Finished difference Result 404 states and 1198 transitions. [2021-04-15 03:30:47,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 03:30:47,743 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 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 20 [2021-04-15 03:30:47,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:30:47,746 INFO L225 Difference]: With dead ends: 404 [2021-04-15 03:30:47,746 INFO L226 Difference]: Without dead ends: 382 [2021-04-15 03:30:47,747 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 328.0ms TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-04-15 03:30:47,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2021-04-15 03:30:47,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 256. [2021-04-15 03:30:47,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 3.062745098039216) internal successors, (781), 255 states have internal predecessors, (781), 0 states have call successors, (0), 0 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 03:30:47,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 781 transitions. [2021-04-15 03:30:47,754 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 781 transitions. Word has length 20 [2021-04-15 03:30:47,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:30:47,754 INFO L480 AbstractCegarLoop]: Abstraction has 256 states and 781 transitions. [2021-04-15 03:30:47,755 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 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 03:30:47,755 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 781 transitions. [2021-04-15 03:30:47,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 03:30:47,756 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:30:47,756 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 03:30:47,968 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-04-15 03:30:47,969 INFO L428 AbstractCegarLoop]: === Iteration 31 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 03:30:47,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:30:47,969 INFO L82 PathProgramCache]: Analyzing trace with hash -428870833, now seen corresponding path program 8 times [2021-04-15 03:30:47,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:30:47,969 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370210146] [2021-04-15 03:30:47,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:30:47,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:30:48,065 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 03:30:48,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370210146] [2021-04-15 03:30:48,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064575433] [2021-04-15 03:30:48,065 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 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 03:30:48,089 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 03:30:48,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:30:48,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 22 conjunts are in the unsatisfiable core [2021-04-15 03:30:48,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:30:48,152 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 03:30:48,152 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-04-15 03:30:48,153 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-04-15 03:30:48,168 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 03:30:48,172 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 03:30:48,172 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:26 [2021-04-15 03:30:48,271 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 03:30:48,271 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:30:48,271 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-04-15 03:30:48,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760922152] [2021-04-15 03:30:48,272 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 03:30:48,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:30:48,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 03:30:48,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-04-15 03:30:48,274 INFO L87 Difference]: Start difference. First operand 256 states and 781 transitions. Second operand has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 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 03:30:48,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:30:48,814 INFO L93 Difference]: Finished difference Result 350 states and 1049 transitions. [2021-04-15 03:30:48,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 03:30:48,815 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 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 20 [2021-04-15 03:30:48,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:30:48,817 INFO L225 Difference]: With dead ends: 350 [2021-04-15 03:30:48,817 INFO L226 Difference]: Without dead ends: 341 [2021-04-15 03:30:48,817 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 448.7ms TimeCoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2021-04-15 03:30:48,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2021-04-15 03:30:48,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 259. [2021-04-15 03:30:48,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 258 states have (on average 3.065891472868217) internal successors, (791), 258 states have internal predecessors, (791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:30:48,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 791 transitions. [2021-04-15 03:30:48,824 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 791 transitions. Word has length 20 [2021-04-15 03:30:48,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:30:48,824 INFO L480 AbstractCegarLoop]: Abstraction has 259 states and 791 transitions. [2021-04-15 03:30:48,825 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 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 03:30:48,825 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 791 transitions. [2021-04-15 03:30:48,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 03:30:48,825 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:30:48,826 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 03:30:49,040 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-04-15 03:30:49,041 INFO L428 AbstractCegarLoop]: === Iteration 32 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 03:30:49,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:30:49,041 INFO L82 PathProgramCache]: Analyzing trace with hash -105284655, now seen corresponding path program 9 times [2021-04-15 03:30:49,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:30:49,042 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685195381] [2021-04-15 03:30:49,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:30:49,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:30:49,148 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 03:30:49,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685195381] [2021-04-15 03:30:49,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910540006] [2021-04-15 03:30:49,148 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 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 03:30:49,178 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 03:30:49,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:30:49,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 20 conjunts are in the unsatisfiable core [2021-04-15 03:30:49,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:30:49,252 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 03:30:49,253 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-04-15 03:30:49,254 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-04-15 03:30:49,268 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 03:30:49,269 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 03:30:49,269 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-04-15 03:30:49,439 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 03:30:49,439 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:30:49,439 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-04-15 03:30:49,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912121011] [2021-04-15 03:30:49,439 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 03:30:49,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:30:49,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 03:30:49,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-04-15 03:30:49,441 INFO L87 Difference]: Start difference. First operand 259 states and 791 transitions. Second operand has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:30:50,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:30:50,302 INFO L93 Difference]: Finished difference Result 353 states and 1060 transitions. [2021-04-15 03:30:50,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 03:30:50,303 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 03:30:50,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:30:50,305 INFO L225 Difference]: With dead ends: 353 [2021-04-15 03:30:50,305 INFO L226 Difference]: Without dead ends: 340 [2021-04-15 03:30:50,305 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 709.1ms TimeCoverageRelationStatistics Valid=143, Invalid=613, Unknown=0, NotChecked=0, Total=756 [2021-04-15 03:30:50,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2021-04-15 03:30:50,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 256. [2021-04-15 03:30:50,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 3.062745098039216) internal successors, (781), 255 states have internal predecessors, (781), 0 states have call successors, (0), 0 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 03:30:50,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 781 transitions. [2021-04-15 03:30:50,313 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 781 transitions. Word has length 20 [2021-04-15 03:30:50,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:30:50,314 INFO L480 AbstractCegarLoop]: Abstraction has 256 states and 781 transitions. [2021-04-15 03:30:50,314 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:30:50,314 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 781 transitions. [2021-04-15 03:30:50,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 03:30:50,315 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:30:50,315 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 03:30:50,524 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-04-15 03:30:50,525 INFO L428 AbstractCegarLoop]: === Iteration 33 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 03:30:50,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:30:50,525 INFO L82 PathProgramCache]: Analyzing trace with hash 431638013, now seen corresponding path program 9 times [2021-04-15 03:30:50,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:30:50,526 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716198712] [2021-04-15 03:30:50,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:30:50,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:30:50,640 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 03:30:50,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716198712] [2021-04-15 03:30:50,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633654012] [2021-04-15 03:30:50,641 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 03:30:50,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 03:30:50,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:30:50,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 20 conjunts are in the unsatisfiable core [2021-04-15 03:30:50,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:30:50,762 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 03:30:50,762 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-04-15 03:30:50,763 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-04-15 03:30:50,772 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 03:30:50,773 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 03:30:50,773 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:23 [2021-04-15 03:30:50,902 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 03:30:50,903 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:30:50,903 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-04-15 03:30:50,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477031948] [2021-04-15 03:30:50,903 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 03:30:50,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:30:50,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 03:30:50,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-04-15 03:30:50,904 INFO L87 Difference]: Start difference. First operand 256 states and 781 transitions. Second operand has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:30:52,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:30:52,002 INFO L93 Difference]: Finished difference Result 485 states and 1380 transitions. [2021-04-15 03:30:52,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-15 03:30:52,002 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 03:30:52,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:30:52,004 INFO L225 Difference]: With dead ends: 485 [2021-04-15 03:30:52,004 INFO L226 Difference]: Without dead ends: 458 [2021-04-15 03:30:52,004 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 758.1ms TimeCoverageRelationStatistics Valid=162, Invalid=830, Unknown=0, NotChecked=0, Total=992 [2021-04-15 03:30:52,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2021-04-15 03:30:52,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 293. [2021-04-15 03:30:52,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 3.095890410958904) internal successors, (904), 292 states have internal predecessors, (904), 0 states have call successors, (0), 0 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 03:30:52,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 904 transitions. [2021-04-15 03:30:52,013 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 904 transitions. Word has length 20 [2021-04-15 03:30:52,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:30:52,013 INFO L480 AbstractCegarLoop]: Abstraction has 293 states and 904 transitions. [2021-04-15 03:30:52,013 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:30:52,013 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 904 transitions. [2021-04-15 03:30:52,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 03:30:52,014 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:30:52,014 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 03:30:52,228 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-04-15 03:30:52,229 INFO L428 AbstractCegarLoop]: === Iteration 34 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 03:30:52,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:30:52,229 INFO L82 PathProgramCache]: Analyzing trace with hash 226719879, now seen corresponding path program 10 times [2021-04-15 03:30:52,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:30:52,229 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569360757] [2021-04-15 03:30:52,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:30:52,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:30:52,342 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 03:30:52,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569360757] [2021-04-15 03:30:52,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211209976] [2021-04-15 03:30:52,343 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:30:52,375 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 03:30:52,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:30:52,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-04-15 03:30:52,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:30:52,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 03:30:52,462 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-04-15 03:30:52,463 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 03:30:52,469 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 03:30:52,471 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 03:30:52,471 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:10 [2021-04-15 03:30:52,515 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 03:30:52,516 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:30:52,516 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-04-15 03:30:52,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572380602] [2021-04-15 03:30:52,517 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 03:30:52,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:30:52,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 03:30:52,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-04-15 03:30:52,518 INFO L87 Difference]: Start difference. First operand 293 states and 904 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:30:52,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:30:52,742 INFO L93 Difference]: Finished difference Result 371 states and 1128 transitions. [2021-04-15 03:30:52,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-04-15 03:30:52,743 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 03:30:52,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:30:52,744 INFO L225 Difference]: With dead ends: 371 [2021-04-15 03:30:52,744 INFO L226 Difference]: Without dead ends: 360 [2021-04-15 03:30:52,745 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 230.7ms TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-04-15 03:30:52,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2021-04-15 03:30:52,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 295. [2021-04-15 03:30:52,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 3.0884353741496597) internal successors, (908), 294 states have internal predecessors, (908), 0 states have call successors, (0), 0 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 03:30:52,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 908 transitions. [2021-04-15 03:30:52,752 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 908 transitions. Word has length 20 [2021-04-15 03:30:52,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:30:52,752 INFO L480 AbstractCegarLoop]: Abstraction has 295 states and 908 transitions. [2021-04-15 03:30:52,752 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:30:52,752 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 908 transitions. [2021-04-15 03:30:52,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 03:30:52,753 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:30:52,753 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 03:30:52,976 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:30:52,976 INFO L428 AbstractCegarLoop]: === Iteration 35 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 03:30:52,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:30:52,976 INFO L82 PathProgramCache]: Analyzing trace with hash 2027400643, now seen corresponding path program 10 times [2021-04-15 03:30:52,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:30:52,977 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422635562] [2021-04-15 03:30:52,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:30:52,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:30:53,055 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 03:30:53,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422635562] [2021-04-15 03:30:53,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216049873] [2021-04-15 03:30:53,056 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:30:53,078 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 03:30:53,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:30:53,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-04-15 03:30:53,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:30:53,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 03:30:53,180 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-04-15 03:30:53,181 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 03:30:53,187 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 03:30:53,189 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 03:30:53,189 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:10 [2021-04-15 03:30:53,230 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 03:30:53,231 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:30:53,231 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-04-15 03:30:53,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254978035] [2021-04-15 03:30:53,231 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 03:30:53,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:30:53,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 03:30:53,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-04-15 03:30:53,232 INFO L87 Difference]: Start difference. First operand 295 states and 908 transitions. Second operand has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 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 03:30:53,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:30:53,424 INFO L93 Difference]: Finished difference Result 412 states and 1240 transitions. [2021-04-15 03:30:53,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 03:30:53,425 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 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 20 [2021-04-15 03:30:53,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:30:53,426 INFO L225 Difference]: With dead ends: 412 [2021-04-15 03:30:53,427 INFO L226 Difference]: Without dead ends: 402 [2021-04-15 03:30:53,427 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 203.0ms TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-04-15 03:30:53,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2021-04-15 03:30:53,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 298. [2021-04-15 03:30:53,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 3.0875420875420874) internal successors, (917), 297 states have internal predecessors, (917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:30:53,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 917 transitions. [2021-04-15 03:30:53,433 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 917 transitions. Word has length 20 [2021-04-15 03:30:53,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:30:53,433 INFO L480 AbstractCegarLoop]: Abstraction has 298 states and 917 transitions. [2021-04-15 03:30:53,433 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 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 03:30:53,433 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 917 transitions. [2021-04-15 03:30:53,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 03:30:53,434 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:30:53,434 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 03:30:53,634 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:30:53,635 INFO L428 AbstractCegarLoop]: === Iteration 36 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 03:30:53,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:30:53,635 INFO L82 PathProgramCache]: Analyzing trace with hash -1645911141, now seen corresponding path program 11 times [2021-04-15 03:30:53,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:30:53,635 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35375633] [2021-04-15 03:30:53,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:30:53,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:30:53,758 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 03:30:53,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35375633] [2021-04-15 03:30:53,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488269896] [2021-04-15 03:30:53,759 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:30:53,781 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 03:30:53,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:30:53,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 20 conjunts are in the unsatisfiable core [2021-04-15 03:30:53,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:30:53,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 03:30:53,911 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-04-15 03:30:53,912 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 03:30:53,922 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 03:30:53,924 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 03:30:53,924 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:28, output treesize:10 [2021-04-15 03:30:53,977 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 03:30:53,977 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:30:53,977 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-04-15 03:30:53,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639957433] [2021-04-15 03:30:53,977 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 03:30:53,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:30:53,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 03:30:53,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-04-15 03:30:53,978 INFO L87 Difference]: Start difference. First operand 298 states and 917 transitions. Second operand has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 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 03:30:54,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:30:54,555 INFO L93 Difference]: Finished difference Result 460 states and 1382 transitions. [2021-04-15 03:30:54,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 03:30:54,556 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 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 20 [2021-04-15 03:30:54,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:30:54,559 INFO L225 Difference]: With dead ends: 460 [2021-04-15 03:30:54,559 INFO L226 Difference]: Without dead ends: 450 [2021-04-15 03:30:54,559 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 446.6ms TimeCoverageRelationStatistics Valid=132, Invalid=518, Unknown=0, NotChecked=0, Total=650 [2021-04-15 03:30:54,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2021-04-15 03:30:54,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 298. [2021-04-15 03:30:54,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 3.0875420875420874) internal successors, (917), 297 states have internal predecessors, (917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:30:54,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 917 transitions. [2021-04-15 03:30:54,568 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 917 transitions. Word has length 20 [2021-04-15 03:30:54,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:30:54,568 INFO L480 AbstractCegarLoop]: Abstraction has 298 states and 917 transitions. [2021-04-15 03:30:54,569 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 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 03:30:54,569 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 917 transitions. [2021-04-15 03:30:54,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 03:30:54,570 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:30:54,570 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 03:30:54,784 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:30:54,785 INFO L428 AbstractCegarLoop]: === Iteration 37 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 03:30:54,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:30:54,785 INFO L82 PathProgramCache]: Analyzing trace with hash 1815317715, now seen corresponding path program 12 times [2021-04-15 03:30:54,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:30:54,785 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37518150] [2021-04-15 03:30:54,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:30:54,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:30:54,898 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:30:54,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37518150] [2021-04-15 03:30:54,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676376169] [2021-04-15 03:30:54,898 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:30:54,935 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-04-15 03:30:54,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:30:54,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 20 conjunts are in the unsatisfiable core [2021-04-15 03:30:54,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:30:55,007 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 03:30:55,008 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-04-15 03:30:55,010 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-04-15 03:30:55,020 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 03:30:55,021 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 03:30:55,021 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-04-15 03:30:55,144 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 03:30:55,144 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:30:55,144 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-04-15 03:30:55,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352071473] [2021-04-15 03:30:55,144 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 03:30:55,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:30:55,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 03:30:55,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-04-15 03:30:55,145 INFO L87 Difference]: Start difference. First operand 298 states and 917 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 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 03:30:56,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:30:56,008 INFO L93 Difference]: Finished difference Result 552 states and 1617 transitions. [2021-04-15 03:30:56,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-04-15 03:30:56,009 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 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 20 [2021-04-15 03:30:56,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:30:56,011 INFO L225 Difference]: With dead ends: 552 [2021-04-15 03:30:56,011 INFO L226 Difference]: Without dead ends: 520 [2021-04-15 03:30:56,011 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 719.8ms TimeCoverageRelationStatistics Valid=215, Invalid=777, Unknown=0, NotChecked=0, Total=992 [2021-04-15 03:30:56,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2021-04-15 03:30:56,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 306. [2021-04-15 03:30:56,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 3.1180327868852458) internal successors, (951), 305 states have internal predecessors, (951), 0 states have call successors, (0), 0 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 03:30:56,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 951 transitions. [2021-04-15 03:30:56,020 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 951 transitions. Word has length 20 [2021-04-15 03:30:56,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:30:56,020 INFO L480 AbstractCegarLoop]: Abstraction has 306 states and 951 transitions. [2021-04-15 03:30:56,020 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 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 03:30:56,020 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 951 transitions. [2021-04-15 03:30:56,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 03:30:56,021 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:30:56,021 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 03:30:56,228 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-04-15 03:30:56,229 INFO L428 AbstractCegarLoop]: === Iteration 38 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 03:30:56,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:30:56,229 INFO L82 PathProgramCache]: Analyzing trace with hash -1895521031, now seen corresponding path program 11 times [2021-04-15 03:30:56,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:30:56,229 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514584744] [2021-04-15 03:30:56,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:30:56,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:30:56,316 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 03:30:56,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514584744] [2021-04-15 03:30:56,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889388696] [2021-04-15 03:30:56,317 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 03:30:56,340 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 03:30:56,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:30:56,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-04-15 03:30:56,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:30:56,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 03:30:56,460 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-04-15 03:30:56,461 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 03:30:56,468 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 03:30:56,470 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 03:30:56,470 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:10 [2021-04-15 03:30:56,501 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 03:30:56,501 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:30:56,502 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-04-15 03:30:56,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878566758] [2021-04-15 03:30:56,503 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 03:30:56,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:30:56,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 03:30:56,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-04-15 03:30:56,504 INFO L87 Difference]: Start difference. First operand 306 states and 951 transitions. Second operand has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 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 03:30:56,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:30:56,683 INFO L93 Difference]: Finished difference Result 408 states and 1237 transitions. [2021-04-15 03:30:56,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 03:30:56,684 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 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 20 [2021-04-15 03:30:56,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:30:56,685 INFO L225 Difference]: With dead ends: 408 [2021-04-15 03:30:56,685 INFO L226 Difference]: Without dead ends: 399 [2021-04-15 03:30:56,686 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 207.4ms TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-04-15 03:30:56,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2021-04-15 03:30:56,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 309. [2021-04-15 03:30:56,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 3.1201298701298703) internal successors, (961), 308 states have internal predecessors, (961), 0 states have call successors, (0), 0 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 03:30:56,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 961 transitions. [2021-04-15 03:30:56,693 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 961 transitions. Word has length 20 [2021-04-15 03:30:56,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:30:56,693 INFO L480 AbstractCegarLoop]: Abstraction has 309 states and 961 transitions. [2021-04-15 03:30:56,693 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 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 03:30:56,693 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 961 transitions. [2021-04-15 03:30:56,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 03:30:56,694 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:30:56,695 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 03:30:56,919 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:30:56,919 INFO L428 AbstractCegarLoop]: === Iteration 39 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 03:30:56,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:30:56,920 INFO L82 PathProgramCache]: Analyzing trace with hash 1371296405, now seen corresponding path program 12 times [2021-04-15 03:30:56,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:30:56,920 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238657543] [2021-04-15 03:30:56,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:30:56,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:30:56,998 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 03:30:56,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238657543] [2021-04-15 03:30:56,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751340849] [2021-04-15 03:30:56,998 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 03:30:57,021 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-04-15 03:30:57,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:30:57,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-04-15 03:30:57,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:30:57,084 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 03:30:57,084 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-04-15 03:30:57,085 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-04-15 03:30:57,094 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 03:30:57,095 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 03:30:57,095 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:21 [2021-04-15 03:30:57,176 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 03:30:57,176 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:30:57,176 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-04-15 03:30:57,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178723779] [2021-04-15 03:30:57,176 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 03:30:57,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:30:57,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 03:30:57,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-04-15 03:30:57,177 INFO L87 Difference]: Start difference. First operand 309 states and 961 transitions. Second operand has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 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 03:30:57,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:30:57,598 INFO L93 Difference]: Finished difference Result 429 states and 1298 transitions. [2021-04-15 03:30:57,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 03:30:57,599 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 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 20 [2021-04-15 03:30:57,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:30:57,600 INFO L225 Difference]: With dead ends: 429 [2021-04-15 03:30:57,600 INFO L226 Difference]: Without dead ends: 420 [2021-04-15 03:30:57,601 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 353.9ms TimeCoverageRelationStatistics Valid=113, Invalid=393, Unknown=0, NotChecked=0, Total=506 [2021-04-15 03:30:57,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2021-04-15 03:30:57,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 312. [2021-04-15 03:30:57,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 3.122186495176849) internal successors, (971), 311 states have internal predecessors, (971), 0 states have call successors, (0), 0 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 03:30:57,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 971 transitions. [2021-04-15 03:30:57,608 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 971 transitions. Word has length 20 [2021-04-15 03:30:57,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:30:57,608 INFO L480 AbstractCegarLoop]: Abstraction has 312 states and 971 transitions. [2021-04-15 03:30:57,609 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 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 03:30:57,609 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 971 transitions. [2021-04-15 03:30:57,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 03:30:57,610 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:30:57,610 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 03:30:57,820 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-04-15 03:30:57,821 INFO L428 AbstractCegarLoop]: === Iteration 40 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 03:30:57,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:30:57,821 INFO L82 PathProgramCache]: Analyzing trace with hash 1694882583, now seen corresponding path program 13 times [2021-04-15 03:30:57,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:30:57,821 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842506933] [2021-04-15 03:30:57,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:30:57,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:30:57,901 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 03:30:57,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842506933] [2021-04-15 03:30:57,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890839929] [2021-04-15 03:30:57,902 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 03:30:57,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:30:57,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-04-15 03:30:57,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:30:58,000 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 03:30:58,002 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-04-15 03:30:58,003 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 03:30:58,011 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 03:30:58,012 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 03:30:58,012 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-04-15 03:30:58,074 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 03:30:58,075 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:30:58,075 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-04-15 03:30:58,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202497173] [2021-04-15 03:30:58,075 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 03:30:58,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:30:58,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 03:30:58,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-04-15 03:30:58,076 INFO L87 Difference]: Start difference. First operand 312 states and 971 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:30:58,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:30:58,264 INFO L93 Difference]: Finished difference Result 391 states and 1193 transitions. [2021-04-15 03:30:58,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-04-15 03:30:58,265 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 03:30:58,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:30:58,266 INFO L225 Difference]: With dead ends: 391 [2021-04-15 03:30:58,266 INFO L226 Difference]: Without dead ends: 380 [2021-04-15 03:30:58,266 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 171.6ms TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-04-15 03:30:58,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2021-04-15 03:30:58,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 306. [2021-04-15 03:30:58,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 3.1180327868852458) internal successors, (951), 305 states have internal predecessors, (951), 0 states have call successors, (0), 0 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 03:30:58,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 951 transitions. [2021-04-15 03:30:58,272 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 951 transitions. Word has length 20 [2021-04-15 03:30:58,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:30:58,272 INFO L480 AbstractCegarLoop]: Abstraction has 306 states and 951 transitions. [2021-04-15 03:30:58,272 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:30:58,272 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 951 transitions. [2021-04-15 03:30:58,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 03:30:58,273 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:30:58,273 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 03:30:58,481 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-04-15 03:30:58,481 INFO L428 AbstractCegarLoop]: === Iteration 41 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 03:30:58,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:30:58,481 INFO L82 PathProgramCache]: Analyzing trace with hash -455362805, now seen corresponding path program 13 times [2021-04-15 03:30:58,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:30:58,481 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976545631] [2021-04-15 03:30:58,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:30:58,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:30:58,600 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 03:30:58,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976545631] [2021-04-15 03:30:58,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624316010] [2021-04-15 03:30:58,601 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 03:30:58,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:30:58,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-04-15 03:30:58,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:30:58,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 03:30:58,741 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-04-15 03:30:58,743 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 03:30:58,752 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 03:30:58,754 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 03:30:58,754 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-04-15 03:30:58,814 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 03:30:58,815 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:30:58,815 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-04-15 03:30:58,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300580218] [2021-04-15 03:30:58,815 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 03:30:58,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:30:58,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 03:30:58,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-04-15 03:30:58,816 INFO L87 Difference]: Start difference. First operand 306 states and 951 transitions. Second operand has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 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 03:30:59,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:30:59,190 INFO L93 Difference]: Finished difference Result 431 states and 1307 transitions. [2021-04-15 03:30:59,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 03:30:59,190 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 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 20 [2021-04-15 03:30:59,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:30:59,192 INFO L225 Difference]: With dead ends: 431 [2021-04-15 03:30:59,192 INFO L226 Difference]: Without dead ends: 421 [2021-04-15 03:30:59,192 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 273.5ms TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-04-15 03:30:59,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2021-04-15 03:30:59,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 309. [2021-04-15 03:30:59,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 3.1136363636363638) internal successors, (959), 308 states have internal predecessors, (959), 0 states have call successors, (0), 0 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 03:30:59,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 959 transitions. [2021-04-15 03:30:59,197 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 959 transitions. Word has length 20 [2021-04-15 03:30:59,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:30:59,197 INFO L480 AbstractCegarLoop]: Abstraction has 309 states and 959 transitions. [2021-04-15 03:30:59,197 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 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 03:30:59,197 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 959 transitions. [2021-04-15 03:30:59,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 03:30:59,208 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:30:59,208 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 03:30:59,412 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-04-15 03:30:59,413 INFO L428 AbstractCegarLoop]: === Iteration 42 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 03:30:59,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:30:59,413 INFO L82 PathProgramCache]: Analyzing trace with hash 2048743317, now seen corresponding path program 14 times [2021-04-15 03:30:59,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:30:59,413 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870780520] [2021-04-15 03:30:59,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:30:59,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:30:59,535 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 03:30:59,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870780520] [2021-04-15 03:30:59,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110933199] [2021-04-15 03:30:59,535 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 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 03:30:59,562 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 03:30:59,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:30:59,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 22 conjunts are in the unsatisfiable core [2021-04-15 03:30:59,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:30:59,630 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 03:30:59,630 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-04-15 03:30:59,631 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-04-15 03:30:59,641 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 03:30:59,642 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 03:30:59,642 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:24 [2021-04-15 03:30:59,730 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 03:30:59,731 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:30:59,731 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-04-15 03:30:59,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159074443] [2021-04-15 03:30:59,731 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 03:30:59,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:30:59,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 03:30:59,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-04-15 03:30:59,732 INFO L87 Difference]: Start difference. First operand 309 states and 959 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 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 03:31:00,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:31:00,131 INFO L93 Difference]: Finished difference Result 487 states and 1471 transitions. [2021-04-15 03:31:00,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 03:31:00,131 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 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 20 [2021-04-15 03:31:00,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:31:00,133 INFO L225 Difference]: With dead ends: 487 [2021-04-15 03:31:00,133 INFO L226 Difference]: Without dead ends: 465 [2021-04-15 03:31:00,133 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 368.4ms TimeCoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2021-04-15 03:31:00,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2021-04-15 03:31:00,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 309. [2021-04-15 03:31:00,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 3.1136363636363638) internal successors, (959), 308 states have internal predecessors, (959), 0 states have call successors, (0), 0 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 03:31:00,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 959 transitions. [2021-04-15 03:31:00,141 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 959 transitions. Word has length 20 [2021-04-15 03:31:00,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:31:00,141 INFO L480 AbstractCegarLoop]: Abstraction has 309 states and 959 transitions. [2021-04-15 03:31:00,141 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 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 03:31:00,142 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 959 transitions. [2021-04-15 03:31:00,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 03:31:00,143 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:31:00,143 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 03:31:00,367 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:31:00,368 INFO L428 AbstractCegarLoop]: === Iteration 43 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 03:31:00,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:31:00,368 INFO L82 PathProgramCache]: Analyzing trace with hash 1782109633, now seen corresponding path program 14 times [2021-04-15 03:31:00,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:31:00,368 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462384093] [2021-04-15 03:31:00,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:31:00,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:31:00,464 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 03:31:00,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462384093] [2021-04-15 03:31:00,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058707198] [2021-04-15 03:31:00,464 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:31:00,498 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 03:31:00,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:31:00,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 22 conjunts are in the unsatisfiable core [2021-04-15 03:31:00,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:31:00,580 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 03:31:00,580 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-04-15 03:31:00,582 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-04-15 03:31:00,593 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 03:31:00,594 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 03:31:00,594 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:24 [2021-04-15 03:31:00,699 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 03:31:00,699 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:31:00,699 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-04-15 03:31:00,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256685838] [2021-04-15 03:31:00,700 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 03:31:00,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:31:00,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 03:31:00,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-04-15 03:31:00,701 INFO L87 Difference]: Start difference. First operand 309 states and 959 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 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 03:31:01,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:31:01,136 INFO L93 Difference]: Finished difference Result 428 states and 1295 transitions. [2021-04-15 03:31:01,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 03:31:01,136 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 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 20 [2021-04-15 03:31:01,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:31:01,138 INFO L225 Difference]: With dead ends: 428 [2021-04-15 03:31:01,138 INFO L226 Difference]: Without dead ends: 419 [2021-04-15 03:31:01,138 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 387.5ms TimeCoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2021-04-15 03:31:01,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2021-04-15 03:31:01,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 312. [2021-04-15 03:31:01,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 3.1157556270096465) internal successors, (969), 311 states have internal predecessors, (969), 0 states have call successors, (0), 0 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 03:31:01,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 969 transitions. [2021-04-15 03:31:01,145 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 969 transitions. Word has length 20 [2021-04-15 03:31:01,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:31:01,145 INFO L480 AbstractCegarLoop]: Abstraction has 312 states and 969 transitions. [2021-04-15 03:31:01,145 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 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 03:31:01,145 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 969 transitions. [2021-04-15 03:31:01,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 03:31:01,146 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:31:01,146 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 03:31:01,371 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:31:01,372 INFO L428 AbstractCegarLoop]: === Iteration 44 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 03:31:01,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:31:01,372 INFO L82 PathProgramCache]: Analyzing trace with hash 2105695811, now seen corresponding path program 15 times [2021-04-15 03:31:01,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:31:01,372 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82177983] [2021-04-15 03:31:01,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:31:01,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:31:01,462 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 03:31:01,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82177983] [2021-04-15 03:31:01,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496389342] [2021-04-15 03:31:01,463 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:31:01,488 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 03:31:01,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:31:01,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 20 conjunts are in the unsatisfiable core [2021-04-15 03:31:01,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:31:01,551 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 03:31:01,552 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-04-15 03:31:01,553 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-04-15 03:31:01,563 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 03:31:01,564 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 03:31:01,565 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-04-15 03:31:01,718 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 03:31:01,718 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:31:01,718 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-04-15 03:31:01,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012067790] [2021-04-15 03:31:01,719 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 03:31:01,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:31:01,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 03:31:01,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-04-15 03:31:01,720 INFO L87 Difference]: Start difference. First operand 312 states and 969 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 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 03:31:02,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:31:02,812 INFO L93 Difference]: Finished difference Result 464 states and 1400 transitions. [2021-04-15 03:31:02,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-04-15 03:31:02,813 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 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 20 [2021-04-15 03:31:02,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:31:02,815 INFO L225 Difference]: With dead ends: 464 [2021-04-15 03:31:02,815 INFO L226 Difference]: Without dead ends: 451 [2021-04-15 03:31:02,815 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 892.5ms TimeCoverageRelationStatistics Valid=219, Invalid=971, Unknown=0, NotChecked=0, Total=1190 [2021-04-15 03:31:02,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2021-04-15 03:31:02,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 309. [2021-04-15 03:31:02,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 3.1136363636363638) internal successors, (959), 308 states have internal predecessors, (959), 0 states have call successors, (0), 0 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 03:31:02,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 959 transitions. [2021-04-15 03:31:02,821 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 959 transitions. Word has length 20 [2021-04-15 03:31:02,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:31:02,821 INFO L480 AbstractCegarLoop]: Abstraction has 309 states and 959 transitions. [2021-04-15 03:31:02,821 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 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 03:31:02,821 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 959 transitions. [2021-04-15 03:31:02,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 03:31:02,822 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:31:02,822 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 03:31:03,022 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-04-15 03:31:03,022 INFO L428 AbstractCegarLoop]: === Iteration 45 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 03:31:03,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:31:03,023 INFO L82 PathProgramCache]: Analyzing trace with hash -1652348817, now seen corresponding path program 15 times [2021-04-15 03:31:03,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:31:03,023 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168710534] [2021-04-15 03:31:03,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:31:03,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:31:03,120 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 03:31:03,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168710534] [2021-04-15 03:31:03,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828017219] [2021-04-15 03:31:03,120 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:31:03,143 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 03:31:03,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:31:03,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 20 conjunts are in the unsatisfiable core [2021-04-15 03:31:03,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:31:03,227 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 03:31:03,227 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-04-15 03:31:03,228 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-04-15 03:31:03,237 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 03:31:03,238 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 03:31:03,238 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:23 [2021-04-15 03:31:03,349 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 03:31:03,349 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:31:03,349 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-04-15 03:31:03,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179595128] [2021-04-15 03:31:03,349 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 03:31:03,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:31:03,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 03:31:03,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-04-15 03:31:03,350 INFO L87 Difference]: Start difference. First operand 309 states and 959 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 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 03:31:04,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:31:04,575 INFO L93 Difference]: Finished difference Result 598 states and 1728 transitions. [2021-04-15 03:31:04,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-04-15 03:31:04,576 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 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 20 [2021-04-15 03:31:04,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:31:04,578 INFO L225 Difference]: With dead ends: 598 [2021-04-15 03:31:04,578 INFO L226 Difference]: Without dead ends: 571 [2021-04-15 03:31:04,579 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 953.9ms TimeCoverageRelationStatistics Valid=223, Invalid=1259, Unknown=0, NotChecked=0, Total=1482 [2021-04-15 03:31:04,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-04-15 03:31:04,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 313. [2021-04-15 03:31:04,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 312 states have (on average 3.1121794871794872) internal successors, (971), 312 states have internal predecessors, (971), 0 states have call successors, (0), 0 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 03:31:04,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 971 transitions. [2021-04-15 03:31:04,587 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 971 transitions. Word has length 20 [2021-04-15 03:31:04,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:31:04,587 INFO L480 AbstractCegarLoop]: Abstraction has 313 states and 971 transitions. [2021-04-15 03:31:04,587 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 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 03:31:04,587 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 971 transitions. [2021-04-15 03:31:04,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 03:31:04,588 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:31:04,588 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 03:31:04,807 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:31:04,807 INFO L428 AbstractCegarLoop]: === Iteration 46 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 03:31:04,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:31:04,807 INFO L82 PathProgramCache]: Analyzing trace with hash -1857266951, now seen corresponding path program 16 times [2021-04-15 03:31:04,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:31:04,807 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587833212] [2021-04-15 03:31:04,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:31:04,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:31:04,912 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 03:31:04,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587833212] [2021-04-15 03:31:04,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497700607] [2021-04-15 03:31:04,912 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:31:04,935 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 03:31:04,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:31:04,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-04-15 03:31:04,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:31:05,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 03:31:05,032 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-04-15 03:31:05,033 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 03:31:05,040 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 03:31:05,041 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 03:31:05,041 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-04-15 03:31:05,079 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 03:31:05,080 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:31:05,080 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-04-15 03:31:05,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023711287] [2021-04-15 03:31:05,080 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 03:31:05,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:31:05,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 03:31:05,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-04-15 03:31:05,081 INFO L87 Difference]: Start difference. First operand 313 states and 971 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:31:05,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:31:05,343 INFO L93 Difference]: Finished difference Result 403 states and 1227 transitions. [2021-04-15 03:31:05,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-04-15 03:31:05,343 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 03:31:05,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:31:05,345 INFO L225 Difference]: With dead ends: 403 [2021-04-15 03:31:05,345 INFO L226 Difference]: Without dead ends: 392 [2021-04-15 03:31:05,345 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 219.4ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-04-15 03:31:05,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2021-04-15 03:31:05,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 306. [2021-04-15 03:31:05,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 3.1180327868852458) internal successors, (951), 305 states have internal predecessors, (951), 0 states have call successors, (0), 0 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 03:31:05,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 951 transitions. [2021-04-15 03:31:05,351 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 951 transitions. Word has length 20 [2021-04-15 03:31:05,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:31:05,351 INFO L480 AbstractCegarLoop]: Abstraction has 306 states and 951 transitions. [2021-04-15 03:31:05,351 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:31:05,352 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 951 transitions. [2021-04-15 03:31:05,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 03:31:05,352 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:31:05,352 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 03:31:05,578 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2021-04-15 03:31:05,579 INFO L428 AbstractCegarLoop]: === Iteration 47 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 03:31:05,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:31:05,579 INFO L82 PathProgramCache]: Analyzing trace with hash -76255857, now seen corresponding path program 16 times [2021-04-15 03:31:05,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:31:05,579 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454258786] [2021-04-15 03:31:05,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:31:05,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:31:05,720 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 03:31:05,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454258786] [2021-04-15 03:31:05,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348785445] [2021-04-15 03:31:05,721 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 03:31:05,760 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 03:31:05,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:31:05,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-04-15 03:31:05,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:31:05,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 03:31:05,835 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-04-15 03:31:05,837 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 03:31:05,850 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 03:31:05,852 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 03:31:05,852 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-04-15 03:31:05,922 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 03:31:05,922 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:31:05,922 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-04-15 03:31:05,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595807580] [2021-04-15 03:31:05,923 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 03:31:05,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:31:05,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 03:31:05,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-04-15 03:31:05,923 INFO L87 Difference]: Start difference. First operand 306 states and 951 transitions. Second operand has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 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 03:31:06,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:31:06,352 INFO L93 Difference]: Finished difference Result 448 states and 1357 transitions. [2021-04-15 03:31:06,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 03:31:06,352 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 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 20 [2021-04-15 03:31:06,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:31:06,354 INFO L225 Difference]: With dead ends: 448 [2021-04-15 03:31:06,355 INFO L226 Difference]: Without dead ends: 438 [2021-04-15 03:31:06,355 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 375.4ms TimeCoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2021-04-15 03:31:06,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2021-04-15 03:31:06,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 312. [2021-04-15 03:31:06,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 3.112540192926045) internal successors, (968), 311 states have internal predecessors, (968), 0 states have call successors, (0), 0 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 03:31:06,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 968 transitions. [2021-04-15 03:31:06,362 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 968 transitions. Word has length 20 [2021-04-15 03:31:06,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:31:06,363 INFO L480 AbstractCegarLoop]: Abstraction has 312 states and 968 transitions. [2021-04-15 03:31:06,363 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 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 03:31:06,363 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 968 transitions. [2021-04-15 03:31:06,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 03:31:06,363 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:31:06,363 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 03:31:06,564 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:31:06,564 INFO L428 AbstractCegarLoop]: === Iteration 48 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 03:31:06,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:31:06,564 INFO L82 PathProgramCache]: Analyzing trace with hash -1438435337, now seen corresponding path program 17 times [2021-04-15 03:31:06,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:31:06,564 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820244099] [2021-04-15 03:31:06,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:31:06,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:31:06,686 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 03:31:06,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820244099] [2021-04-15 03:31:06,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639103654] [2021-04-15 03:31:06,687 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:31:06,712 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-04-15 03:31:06,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:31:06,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-04-15 03:31:06,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:31:06,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 03:31:06,789 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-04-15 03:31:06,790 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 03:31:06,798 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 03:31:06,799 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 03:31:06,799 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-04-15 03:31:06,854 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 03:31:06,855 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:31:06,855 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-04-15 03:31:06,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810367274] [2021-04-15 03:31:06,855 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 03:31:06,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:31:06,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 03:31:06,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-04-15 03:31:06,856 INFO L87 Difference]: Start difference. First operand 312 states and 968 transitions. Second operand has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:31:07,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:31:07,336 INFO L93 Difference]: Finished difference Result 497 states and 1504 transitions. [2021-04-15 03:31:07,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 03:31:07,336 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 03:31:07,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:31:07,339 INFO L225 Difference]: With dead ends: 497 [2021-04-15 03:31:07,339 INFO L226 Difference]: Without dead ends: 485 [2021-04-15 03:31:07,339 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 350.8ms TimeCoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2021-04-15 03:31:07,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2021-04-15 03:31:07,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 312. [2021-04-15 03:31:07,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 3.112540192926045) internal successors, (968), 311 states have internal predecessors, (968), 0 states have call successors, (0), 0 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 03:31:07,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 968 transitions. [2021-04-15 03:31:07,347 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 968 transitions. Word has length 20 [2021-04-15 03:31:07,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:31:07,348 INFO L480 AbstractCegarLoop]: Abstraction has 312 states and 968 transitions. [2021-04-15 03:31:07,348 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:31:07,348 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 968 transitions. [2021-04-15 03:31:07,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 03:31:07,349 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:31:07,349 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 03:31:07,556 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2021-04-15 03:31:07,557 INFO L428 AbstractCegarLoop]: === Iteration 49 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 03:31:07,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:31:07,557 INFO L82 PathProgramCache]: Analyzing trace with hash -1865369703, now seen corresponding path program 17 times [2021-04-15 03:31:07,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:31:07,557 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814704309] [2021-04-15 03:31:07,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:31:07,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:31:07,640 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 03:31:07,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814704309] [2021-04-15 03:31:07,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28356745] [2021-04-15 03:31:07,640 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 03:31:07,663 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-04-15 03:31:07,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:31:07,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-04-15 03:31:07,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:31:07,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 03:31:07,733 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-04-15 03:31:07,735 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 03:31:07,745 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 03:31:07,746 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 03:31:07,747 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-04-15 03:31:07,815 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 03:31:07,816 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:31:07,816 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-04-15 03:31:07,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511929971] [2021-04-15 03:31:07,816 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 03:31:07,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:31:07,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 03:31:07,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-04-15 03:31:07,817 INFO L87 Difference]: Start difference. First operand 312 states and 968 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 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 03:31:08,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:31:08,045 INFO L93 Difference]: Finished difference Result 435 states and 1319 transitions. [2021-04-15 03:31:08,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-04-15 03:31:08,046 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 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 20 [2021-04-15 03:31:08,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:31:08,048 INFO L225 Difference]: With dead ends: 435 [2021-04-15 03:31:08,048 INFO L226 Difference]: Without dead ends: 426 [2021-04-15 03:31:08,048 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 223.2ms TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-04-15 03:31:08,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2021-04-15 03:31:08,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 315. [2021-04-15 03:31:08,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 314 states have (on average 3.1146496815286624) internal successors, (978), 314 states have internal predecessors, (978), 0 states have call successors, (0), 0 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 03:31:08,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 978 transitions. [2021-04-15 03:31:08,055 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 978 transitions. Word has length 20 [2021-04-15 03:31:08,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:31:08,055 INFO L480 AbstractCegarLoop]: Abstraction has 315 states and 978 transitions. [2021-04-15 03:31:08,055 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 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 03:31:08,055 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 978 transitions. [2021-04-15 03:31:08,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 03:31:08,055 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:31:08,055 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 03:31:08,256 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-04-15 03:31:08,256 INFO L428 AbstractCegarLoop]: === Iteration 50 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 03:31:08,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:31:08,256 INFO L82 PathProgramCache]: Analyzing trace with hash -1541783525, now seen corresponding path program 18 times [2021-04-15 03:31:08,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:31:08,256 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846370288] [2021-04-15 03:31:08,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:31:08,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:31:08,333 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 03:31:08,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846370288] [2021-04-15 03:31:08,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423589613] [2021-04-15 03:31:08,333 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 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 03:31:08,354 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-04-15 03:31:08,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:31:08,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-04-15 03:31:08,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:31:08,415 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 03:31:08,415 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-04-15 03:31:08,418 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-04-15 03:31:08,430 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 03:31:08,431 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 03:31:08,431 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:21 [2021-04-15 03:31:08,521 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 03:31:08,522 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:31:08,522 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-04-15 03:31:08,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641757325] [2021-04-15 03:31:08,522 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 03:31:08,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:31:08,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 03:31:08,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-04-15 03:31:08,522 INFO L87 Difference]: Start difference. First operand 315 states and 978 transitions. Second operand has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 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 03:31:08,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:31:08,892 INFO L93 Difference]: Finished difference Result 432 states and 1315 transitions. [2021-04-15 03:31:08,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 03:31:08,892 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 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 20 [2021-04-15 03:31:08,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:31:08,893 INFO L225 Difference]: With dead ends: 432 [2021-04-15 03:31:08,894 INFO L226 Difference]: Without dead ends: 421 [2021-04-15 03:31:08,894 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 294.5ms TimeCoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2021-04-15 03:31:08,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2021-04-15 03:31:08,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 312. [2021-04-15 03:31:08,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 3.112540192926045) internal successors, (968), 311 states have internal predecessors, (968), 0 states have call successors, (0), 0 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 03:31:08,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 968 transitions. [2021-04-15 03:31:08,899 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 968 transitions. Word has length 20 [2021-04-15 03:31:08,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:31:08,899 INFO L480 AbstractCegarLoop]: Abstraction has 312 states and 968 transitions. [2021-04-15 03:31:08,899 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 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 03:31:08,900 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 968 transitions. [2021-04-15 03:31:08,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 03:31:08,900 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:31:08,900 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 03:31:09,101 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:31:09,101 INFO L428 AbstractCegarLoop]: === Iteration 51 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 03:31:09,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:31:09,101 INFO L82 PathProgramCache]: Analyzing trace with hash -1004860857, now seen corresponding path program 18 times [2021-04-15 03:31:09,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:31:09,101 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054474496] [2021-04-15 03:31:09,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:31:09,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:31:09,226 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 03:31:09,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054474496] [2021-04-15 03:31:09,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215495256] [2021-04-15 03:31:09,226 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 03:31:09,266 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-04-15 03:31:09,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:31:09,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 20 conjunts are in the unsatisfiable core [2021-04-15 03:31:09,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:31:09,355 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 03:31:09,355 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-04-15 03:31:09,356 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-04-15 03:31:09,366 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 03:31:09,370 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 03:31:09,370 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:29 [2021-04-15 03:31:09,464 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 03:31:09,465 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:31:09,465 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-04-15 03:31:09,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062086961] [2021-04-15 03:31:09,465 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 03:31:09,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:31:09,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 03:31:09,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-04-15 03:31:09,466 INFO L87 Difference]: Start difference. First operand 312 states and 968 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 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 03:31:10,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:31:10,717 INFO L93 Difference]: Finished difference Result 644 states and 1918 transitions. [2021-04-15 03:31:10,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-04-15 03:31:10,717 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 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 20 [2021-04-15 03:31:10,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:31:10,719 INFO L225 Difference]: With dead ends: 644 [2021-04-15 03:31:10,719 INFO L226 Difference]: Without dead ends: 622 [2021-04-15 03:31:10,719 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 907.9ms TimeCoverageRelationStatistics Valid=160, Invalid=832, Unknown=0, NotChecked=0, Total=992 [2021-04-15 03:31:10,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 622 states. [2021-04-15 03:31:10,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 622 to 316. [2021-04-15 03:31:10,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 315 states have (on average 3.111111111111111) internal successors, (980), 315 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:31:10,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 980 transitions. [2021-04-15 03:31:10,726 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 980 transitions. Word has length 20 [2021-04-15 03:31:10,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:31:10,726 INFO L480 AbstractCegarLoop]: Abstraction has 316 states and 980 transitions. [2021-04-15 03:31:10,726 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 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 03:31:10,726 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 980 transitions. [2021-04-15 03:31:10,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 03:31:10,727 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:31:10,727 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 03:31:10,930 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:31:10,931 INFO L428 AbstractCegarLoop]: === Iteration 52 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 03:31:10,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:31:10,931 INFO L82 PathProgramCache]: Analyzing trace with hash -1209778991, now seen corresponding path program 19 times [2021-04-15 03:31:10,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:31:10,931 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246583425] [2021-04-15 03:31:10,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:31:10,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:31:11,034 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 03:31:11,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246583425] [2021-04-15 03:31:11,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25489378] [2021-04-15 03:31:11,035 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 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 03:31:11,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:31:11,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-04-15 03:31:11,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:31:11,154 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 03:31:11,155 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-04-15 03:31:11,156 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 03:31:11,164 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 03:31:11,165 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 03:31:11,165 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-04-15 03:31:11,210 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 03:31:11,210 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:31:11,210 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-04-15 03:31:11,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752072127] [2021-04-15 03:31:11,211 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 03:31:11,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:31:11,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 03:31:11,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-04-15 03:31:11,211 INFO L87 Difference]: Start difference. First operand 316 states and 980 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:31:11,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:31:11,495 INFO L93 Difference]: Finished difference Result 437 states and 1326 transitions. [2021-04-15 03:31:11,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-04-15 03:31:11,496 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 03:31:11,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:31:11,497 INFO L225 Difference]: With dead ends: 437 [2021-04-15 03:31:11,497 INFO L226 Difference]: Without dead ends: 426 [2021-04-15 03:31:11,497 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 240.4ms TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-04-15 03:31:11,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2021-04-15 03:31:11,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 315. [2021-04-15 03:31:11,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 314 states have (on average 3.1178343949044587) internal successors, (979), 314 states have internal predecessors, (979), 0 states have call successors, (0), 0 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 03:31:11,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 979 transitions. [2021-04-15 03:31:11,503 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 979 transitions. Word has length 20 [2021-04-15 03:31:11,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:31:11,503 INFO L480 AbstractCegarLoop]: Abstraction has 315 states and 979 transitions. [2021-04-15 03:31:11,503 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:31:11,503 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 979 transitions. [2021-04-15 03:31:11,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 03:31:11,504 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:31:11,504 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 03:31:11,716 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:31:11,717 INFO L428 AbstractCegarLoop]: === Iteration 53 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 03:31:11,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:31:11,717 INFO L82 PathProgramCache]: Analyzing trace with hash -1625404767, now seen corresponding path program 19 times [2021-04-15 03:31:11,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:31:11,717 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024219713] [2021-04-15 03:31:11,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:31:11,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:31:11,841 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 03:31:11,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024219713] [2021-04-15 03:31:11,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993037744] [2021-04-15 03:31:11,841 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 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 03:31:11,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:31:11,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-04-15 03:31:11,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:31:11,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 03:31:11,947 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-04-15 03:31:11,948 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 03:31:11,955 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 03:31:11,956 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 03:31:11,956 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-04-15 03:31:11,998 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 03:31:11,998 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:31:11,998 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-04-15 03:31:11,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069014058] [2021-04-15 03:31:11,999 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 03:31:11,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:31:11,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 03:31:11,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-04-15 03:31:11,999 INFO L87 Difference]: Start difference. First operand 315 states and 979 transitions. Second operand has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:31:12,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:31:12,588 INFO L93 Difference]: Finished difference Result 577 states and 1769 transitions. [2021-04-15 03:31:12,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 03:31:12,589 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 03:31:12,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:31:12,590 INFO L225 Difference]: With dead ends: 577 [2021-04-15 03:31:12,590 INFO L226 Difference]: Without dead ends: 566 [2021-04-15 03:31:12,591 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 372.7ms TimeCoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2021-04-15 03:31:12,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2021-04-15 03:31:12,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 323. [2021-04-15 03:31:12,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 3.1180124223602483) internal successors, (1004), 322 states have internal predecessors, (1004), 0 states have call successors, (0), 0 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 03:31:12,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 1004 transitions. [2021-04-15 03:31:12,597 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 1004 transitions. Word has length 20 [2021-04-15 03:31:12,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:31:12,597 INFO L480 AbstractCegarLoop]: Abstraction has 323 states and 1004 transitions. [2021-04-15 03:31:12,597 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:31:12,598 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 1004 transitions. [2021-04-15 03:31:12,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 03:31:12,598 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:31:12,598 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 03:31:12,798 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:31:12,799 INFO L428 AbstractCegarLoop]: === Iteration 54 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 03:31:12,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:31:12,799 INFO L82 PathProgramCache]: Analyzing trace with hash -1821665449, now seen corresponding path program 20 times [2021-04-15 03:31:12,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:31:12,799 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439729653] [2021-04-15 03:31:12,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:31:12,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:31:12,901 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 03:31:12,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439729653] [2021-04-15 03:31:12,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844012230] [2021-04-15 03:31:12,902 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:31:12,932 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 03:31:12,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:31:12,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 22 conjunts are in the unsatisfiable core [2021-04-15 03:31:12,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:31:13,036 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 03:31:13,037 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-04-15 03:31:13,045 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-04-15 03:31:13,062 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 03:31:13,063 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 03:31:13,063 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:22 [2021-04-15 03:31:13,156 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 03:31:13,156 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:31:13,156 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-04-15 03:31:13,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392896480] [2021-04-15 03:31:13,157 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 03:31:13,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:31:13,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 03:31:13,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2021-04-15 03:31:13,157 INFO L87 Difference]: Start difference. First operand 323 states and 1004 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 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 03:31:13,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:31:13,653 INFO L93 Difference]: Finished difference Result 516 states and 1586 transitions. [2021-04-15 03:31:13,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 03:31:13,654 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 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 20 [2021-04-15 03:31:13,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:31:13,655 INFO L225 Difference]: With dead ends: 516 [2021-04-15 03:31:13,655 INFO L226 Difference]: Without dead ends: 505 [2021-04-15 03:31:13,655 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 381.2ms TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-04-15 03:31:13,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2021-04-15 03:31:13,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 322. [2021-04-15 03:31:13,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 321 states have (on average 3.1246105919003115) internal successors, (1003), 321 states have internal predecessors, (1003), 0 states have call successors, (0), 0 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 03:31:13,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 1003 transitions. [2021-04-15 03:31:13,663 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 1003 transitions. Word has length 20 [2021-04-15 03:31:13,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:31:13,663 INFO L480 AbstractCegarLoop]: Abstraction has 322 states and 1003 transitions. [2021-04-15 03:31:13,663 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 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 03:31:13,663 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 1003 transitions. [2021-04-15 03:31:13,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 03:31:13,664 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:31:13,664 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] [2021-04-15 03:31:13,864 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:31:13,865 INFO L428 AbstractCegarLoop]: === Iteration 55 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 03:31:13,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:31:13,865 INFO L82 PathProgramCache]: Analyzing trace with hash -827696633, now seen corresponding path program 20 times [2021-04-15 03:31:13,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:31:13,865 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360290049] [2021-04-15 03:31:13,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:31:13,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:31:13,894 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 03:31:13,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360290049] [2021-04-15 03:31:13,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021455918] [2021-04-15 03:31:13,895 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:31:13,918 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 03:31:13,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:31:13,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-04-15 03:31:13,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:31:13,993 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 03:31:13,993 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:31:13,993 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-04-15 03:31:13,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083766210] [2021-04-15 03:31:13,994 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 03:31:13,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:31:13,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 03:31:13,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-04-15 03:31:13,994 INFO L87 Difference]: Start difference. First operand 322 states and 1003 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:31:14,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:31:14,094 INFO L93 Difference]: Finished difference Result 489 states and 1527 transitions. [2021-04-15 03:31:14,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 03:31:14,095 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 03:31:14,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:31:14,096 INFO L225 Difference]: With dead ends: 489 [2021-04-15 03:31:14,096 INFO L226 Difference]: Without dead ends: 489 [2021-04-15 03:31:14,097 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 64.0ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-04-15 03:31:14,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2021-04-15 03:31:14,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 311. [2021-04-15 03:31:14,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 310 states have (on average 3.203225806451613) internal successors, (993), 310 states have internal predecessors, (993), 0 states have call successors, (0), 0 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 03:31:14,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 993 transitions. [2021-04-15 03:31:14,104 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 993 transitions. Word has length 22 [2021-04-15 03:31:14,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:31:14,104 INFO L480 AbstractCegarLoop]: Abstraction has 311 states and 993 transitions. [2021-04-15 03:31:14,104 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:31:14,104 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 993 transitions. [2021-04-15 03:31:14,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 03:31:14,105 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:31:14,105 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] [2021-04-15 03:31:14,308 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:31:14,309 INFO L428 AbstractCegarLoop]: === Iteration 56 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 03:31:14,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:31:14,309 INFO L82 PathProgramCache]: Analyzing trace with hash 196643718, now seen corresponding path program 21 times [2021-04-15 03:31:14,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:31:14,309 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717377457] [2021-04-15 03:31:14,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:31:14,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:31:14,337 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 03:31:14,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717377457] [2021-04-15 03:31:14,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28100294] [2021-04-15 03:31:14,338 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:31:14,362 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 03:31:14,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:31:14,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-04-15 03:31:14,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:31:14,420 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 03:31:14,420 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:31:14,420 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-04-15 03:31:14,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639215384] [2021-04-15 03:31:14,421 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 03:31:14,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:31:14,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 03:31:14,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-04-15 03:31:14,421 INFO L87 Difference]: Start difference. First operand 311 states and 993 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:31:14,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:31:14,517 INFO L93 Difference]: Finished difference Result 498 states and 1529 transitions. [2021-04-15 03:31:14,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-04-15 03:31:14,518 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 03:31:14,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:31:14,519 INFO L225 Difference]: With dead ends: 498 [2021-04-15 03:31:14,519 INFO L226 Difference]: Without dead ends: 439 [2021-04-15 03:31:14,519 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 68.9ms TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-04-15 03:31:14,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2021-04-15 03:31:14,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 311. [2021-04-15 03:31:14,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 310 states have (on average 3.170967741935484) internal successors, (983), 310 states have internal predecessors, (983), 0 states have call successors, (0), 0 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 03:31:14,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 983 transitions. [2021-04-15 03:31:14,527 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 983 transitions. Word has length 22 [2021-04-15 03:31:14,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:31:14,527 INFO L480 AbstractCegarLoop]: Abstraction has 311 states and 983 transitions. [2021-04-15 03:31:14,527 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:31:14,527 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 983 transitions. [2021-04-15 03:31:14,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 03:31:14,528 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:31:14,528 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] [2021-04-15 03:31:14,751 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2021-04-15 03:31:14,751 INFO L428 AbstractCegarLoop]: === Iteration 57 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 03:31:14,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:31:14,752 INFO L82 PathProgramCache]: Analyzing trace with hash -1724048449, now seen corresponding path program 22 times [2021-04-15 03:31:14,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:31:14,752 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329309419] [2021-04-15 03:31:14,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:31:14,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:31:14,778 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 03:31:14,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329309419] [2021-04-15 03:31:14,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981250513] [2021-04-15 03:31:14,779 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:31:14,802 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 03:31:14,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:31:14,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-04-15 03:31:14,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:31:14,882 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 03:31:14,882 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:31:14,882 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-04-15 03:31:14,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819101942] [2021-04-15 03:31:14,883 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 03:31:14,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:31:14,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 03:31:14,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-04-15 03:31:14,884 INFO L87 Difference]: Start difference. First operand 311 states and 983 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:31:15,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:31:15,032 INFO L93 Difference]: Finished difference Result 640 states and 1919 transitions. [2021-04-15 03:31:15,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-04-15 03:31:15,033 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 03:31:15,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:31:15,035 INFO L225 Difference]: With dead ends: 640 [2021-04-15 03:31:15,035 INFO L226 Difference]: Without dead ends: 640 [2021-04-15 03:31:15,035 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 89.8ms TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2021-04-15 03:31:15,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 640 states. [2021-04-15 03:31:15,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 640 to 368. [2021-04-15 03:31:15,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 367 states have (on average 3.231607629427793) internal successors, (1186), 367 states have internal predecessors, (1186), 0 states have call successors, (0), 0 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 03:31:15,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 1186 transitions. [2021-04-15 03:31:15,042 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 1186 transitions. Word has length 22 [2021-04-15 03:31:15,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:31:15,042 INFO L480 AbstractCegarLoop]: Abstraction has 368 states and 1186 transitions. [2021-04-15 03:31:15,042 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:31:15,042 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 1186 transitions. [2021-04-15 03:31:15,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 03:31:15,043 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:31:15,043 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] [2021-04-15 03:31:15,243 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-04-15 03:31:15,244 INFO L428 AbstractCegarLoop]: === Iteration 58 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 03:31:15,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:31:15,244 INFO L82 PathProgramCache]: Analyzing trace with hash 40343294, now seen corresponding path program 23 times [2021-04-15 03:31:15,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:31:15,244 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093491248] [2021-04-15 03:31:15,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:31:15,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:31:15,273 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 03:31:15,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093491248] [2021-04-15 03:31:15,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014245805] [2021-04-15 03:31:15,273 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:31:15,317 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-04-15 03:31:15,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:31:15,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-04-15 03:31:15,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:31:15,380 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 03:31:15,381 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:31:15,381 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-04-15 03:31:15,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726594899] [2021-04-15 03:31:15,381 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 03:31:15,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:31:15,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 03:31:15,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-04-15 03:31:15,382 INFO L87 Difference]: Start difference. First operand 368 states and 1186 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 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 03:31:15,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:31:15,550 INFO L93 Difference]: Finished difference Result 772 states and 2287 transitions. [2021-04-15 03:31:15,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 03:31:15,551 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 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 03:31:15,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:31:15,553 INFO L225 Difference]: With dead ends: 772 [2021-04-15 03:31:15,553 INFO L226 Difference]: Without dead ends: 728 [2021-04-15 03:31:15,553 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 123.2ms TimeCoverageRelationStatistics Valid=115, Invalid=265, Unknown=0, NotChecked=0, Total=380 [2021-04-15 03:31:15,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 728 states. [2021-04-15 03:31:15,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 728 to 506. [2021-04-15 03:31:15,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 505 states have (on average 3.235643564356436) internal successors, (1634), 505 states have internal predecessors, (1634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:31:15,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 1634 transitions. [2021-04-15 03:31:15,563 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 1634 transitions. Word has length 22 [2021-04-15 03:31:15,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:31:15,563 INFO L480 AbstractCegarLoop]: Abstraction has 506 states and 1634 transitions. [2021-04-15 03:31:15,563 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 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 03:31:15,563 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 1634 transitions. [2021-04-15 03:31:15,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 03:31:15,564 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:31:15,564 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] [2021-04-15 03:31:15,764 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-04-15 03:31:15,764 INFO L428 AbstractCegarLoop]: === Iteration 59 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 03:31:15,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:31:15,765 INFO L82 PathProgramCache]: Analyzing trace with hash 358278619, now seen corresponding path program 24 times [2021-04-15 03:31:15,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:31:15,765 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362306906] [2021-04-15 03:31:15,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:31:15,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:31:15,794 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 03:31:15,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362306906] [2021-04-15 03:31:15,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839434120] [2021-04-15 03:31:15,795 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:31:15,835 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-04-15 03:31:15,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:31:15,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-04-15 03:31:15,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:31:15,917 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 03:31:15,917 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:31:15,918 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-04-15 03:31:15,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390396008] [2021-04-15 03:31:15,919 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 03:31:15,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:31:15,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 03:31:15,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-04-15 03:31:15,919 INFO L87 Difference]: Start difference. First operand 506 states and 1634 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:31:16,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:31:16,103 INFO L93 Difference]: Finished difference Result 972 states and 2907 transitions. [2021-04-15 03:31:16,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 03:31:16,104 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 03:31:16,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:31:16,107 INFO L225 Difference]: With dead ends: 972 [2021-04-15 03:31:16,107 INFO L226 Difference]: Without dead ends: 972 [2021-04-15 03:31:16,107 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 120.4ms TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2021-04-15 03:31:16,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 972 states. [2021-04-15 03:31:16,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 972 to 557. [2021-04-15 03:31:16,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 557 states, 556 states have (on average 3.318345323741007) internal successors, (1845), 556 states have internal predecessors, (1845), 0 states have call successors, (0), 0 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 03:31:16,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 557 states to 557 states and 1845 transitions. [2021-04-15 03:31:16,119 INFO L78 Accepts]: Start accepts. Automaton has 557 states and 1845 transitions. Word has length 22 [2021-04-15 03:31:16,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:31:16,120 INFO L480 AbstractCegarLoop]: Abstraction has 557 states and 1845 transitions. [2021-04-15 03:31:16,120 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:31:16,120 INFO L276 IsEmpty]: Start isEmpty. Operand 557 states and 1845 transitions. [2021-04-15 03:31:16,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 03:31:16,121 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:31:16,121 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] [2021-04-15 03:31:16,327 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:31:16,327 INFO L428 AbstractCegarLoop]: === Iteration 60 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 03:31:16,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:31:16,327 INFO L82 PathProgramCache]: Analyzing trace with hash -527046306, now seen corresponding path program 25 times [2021-04-15 03:31:16,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:31:16,327 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628735682] [2021-04-15 03:31:16,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:31:16,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:31:16,360 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 03:31:16,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628735682] [2021-04-15 03:31:16,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484262379] [2021-04-15 03:31:16,360 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:31:16,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:31:16,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-04-15 03:31:16,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:31:16,470 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 03:31:16,470 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:31:16,470 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-04-15 03:31:16,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038767801] [2021-04-15 03:31:16,471 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 03:31:16,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:31:16,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 03:31:16,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-04-15 03:31:16,471 INFO L87 Difference]: Start difference. First operand 557 states and 1845 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 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 03:31:16,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:31:16,683 INFO L93 Difference]: Finished difference Result 964 states and 2972 transitions. [2021-04-15 03:31:16,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 03:31:16,684 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 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 03:31:16,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:31:16,686 INFO L225 Difference]: With dead ends: 964 [2021-04-15 03:31:16,686 INFO L226 Difference]: Without dead ends: 916 [2021-04-15 03:31:16,686 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 129.4ms TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2021-04-15 03:31:16,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 916 states. [2021-04-15 03:31:16,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 916 to 606. [2021-04-15 03:31:16,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 606 states, 605 states have (on average 3.3338842975206613) internal successors, (2017), 605 states have internal predecessors, (2017), 0 states have call successors, (0), 0 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 03:31:16,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 606 states to 606 states and 2017 transitions. [2021-04-15 03:31:16,700 INFO L78 Accepts]: Start accepts. Automaton has 606 states and 2017 transitions. Word has length 22 [2021-04-15 03:31:16,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:31:16,700 INFO L480 AbstractCegarLoop]: Abstraction has 606 states and 2017 transitions. [2021-04-15 03:31:16,700 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 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 03:31:16,700 INFO L276 IsEmpty]: Start isEmpty. Operand 606 states and 2017 transitions. [2021-04-15 03:31:16,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 03:31:16,702 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:31:16,702 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] [2021-04-15 03:31:16,904 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-04-15 03:31:16,905 INFO L428 AbstractCegarLoop]: === Iteration 61 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 03:31:16,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:31:16,907 INFO L82 PathProgramCache]: Analyzing trace with hash -1135425701, now seen corresponding path program 26 times [2021-04-15 03:31:16,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:31:16,907 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437964180] [2021-04-15 03:31:16,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:31:16,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:31:16,938 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 03:31:16,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437964180] [2021-04-15 03:31:16,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794765665] [2021-04-15 03:31:16,938 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:31:16,963 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 03:31:16,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:31:16,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-04-15 03:31:16,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:31:17,018 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 03:31:17,019 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:31:17,019 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-04-15 03:31:17,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388834278] [2021-04-15 03:31:17,019 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 03:31:17,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:31:17,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 03:31:17,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-04-15 03:31:17,019 INFO L87 Difference]: Start difference. First operand 606 states and 2017 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:31:17,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:31:17,228 INFO L93 Difference]: Finished difference Result 881 states and 2727 transitions. [2021-04-15 03:31:17,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 03:31:17,228 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 03:31:17,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:31:17,230 INFO L225 Difference]: With dead ends: 881 [2021-04-15 03:31:17,231 INFO L226 Difference]: Without dead ends: 871 [2021-04-15 03:31:17,231 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 124.2ms TimeCoverageRelationStatistics Valid=149, Invalid=271, Unknown=0, NotChecked=0, Total=420 [2021-04-15 03:31:17,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 871 states. [2021-04-15 03:31:17,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 871 to 612. [2021-04-15 03:31:17,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 612 states, 611 states have (on average 3.3060556464811786) internal successors, (2020), 611 states have internal predecessors, (2020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:31:17,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 612 states to 612 states and 2020 transitions. [2021-04-15 03:31:17,243 INFO L78 Accepts]: Start accepts. Automaton has 612 states and 2020 transitions. Word has length 22 [2021-04-15 03:31:17,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:31:17,243 INFO L480 AbstractCegarLoop]: Abstraction has 612 states and 2020 transitions. [2021-04-15 03:31:17,243 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:31:17,243 INFO L276 IsEmpty]: Start isEmpty. Operand 612 states and 2020 transitions. [2021-04-15 03:31:17,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 03:31:17,245 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:31:17,245 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] [2021-04-15 03:31:17,460 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-04-15 03:31:17,461 INFO L428 AbstractCegarLoop]: === Iteration 62 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 03:31:17,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:31:17,461 INFO L82 PathProgramCache]: Analyzing trace with hash -1507852130, now seen corresponding path program 27 times [2021-04-15 03:31:17,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:31:17,461 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751723458] [2021-04-15 03:31:17,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:31:17,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:31:17,491 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 03:31:17,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751723458] [2021-04-15 03:31:17,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825966744] [2021-04-15 03:31:17,492 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:31:17,523 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 03:31:17,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:31:17,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-04-15 03:31:17,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:31:17,583 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 03:31:17,584 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:31:17,584 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-04-15 03:31:17,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803471688] [2021-04-15 03:31:17,584 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 03:31:17,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:31:17,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 03:31:17,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-04-15 03:31:17,585 INFO L87 Difference]: Start difference. First operand 612 states and 2020 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:31:17,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:31:17,754 INFO L93 Difference]: Finished difference Result 917 states and 2822 transitions. [2021-04-15 03:31:17,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 03:31:17,755 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 03:31:17,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:31:17,757 INFO L225 Difference]: With dead ends: 917 [2021-04-15 03:31:17,757 INFO L226 Difference]: Without dead ends: 893 [2021-04-15 03:31:17,757 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 97.6ms TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-04-15 03:31:17,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 893 states. [2021-04-15 03:31:17,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 893 to 606. [2021-04-15 03:31:17,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 606 states, 605 states have (on average 3.3239669421487603) internal successors, (2011), 605 states have internal predecessors, (2011), 0 states have call successors, (0), 0 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 03:31:17,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 606 states to 606 states and 2011 transitions. [2021-04-15 03:31:17,773 INFO L78 Accepts]: Start accepts. Automaton has 606 states and 2011 transitions. Word has length 22 [2021-04-15 03:31:17,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:31:17,773 INFO L480 AbstractCegarLoop]: Abstraction has 606 states and 2011 transitions. [2021-04-15 03:31:17,774 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:31:17,774 INFO L276 IsEmpty]: Start isEmpty. Operand 606 states and 2011 transitions. [2021-04-15 03:31:17,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 03:31:17,775 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:31:17,775 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] [2021-04-15 03:31:17,992 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:31:17,992 INFO L428 AbstractCegarLoop]: === Iteration 63 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 03:31:17,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:31:17,993 INFO L82 PathProgramCache]: Analyzing trace with hash 326583295, now seen corresponding path program 28 times [2021-04-15 03:31:17,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:31:17,993 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548460146] [2021-04-15 03:31:17,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:31:17,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:31:18,024 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 03:31:18,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548460146] [2021-04-15 03:31:18,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331165294] [2021-04-15 03:31:18,024 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:31:18,054 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 03:31:18,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:31:18,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-04-15 03:31:18,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:31:18,140 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 03:31:18,140 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:31:18,140 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-04-15 03:31:18,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673430346] [2021-04-15 03:31:18,141 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 03:31:18,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:31:18,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 03:31:18,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-04-15 03:31:18,141 INFO L87 Difference]: Start difference. First operand 606 states and 2011 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:31:18,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:31:18,347 INFO L93 Difference]: Finished difference Result 1221 states and 3751 transitions. [2021-04-15 03:31:18,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 03:31:18,347 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 03:31:18,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:31:18,355 INFO L225 Difference]: With dead ends: 1221 [2021-04-15 03:31:18,356 INFO L226 Difference]: Without dead ends: 1221 [2021-04-15 03:31:18,356 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 133.1ms TimeCoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2021-04-15 03:31:18,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1221 states. [2021-04-15 03:31:18,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1221 to 650. [2021-04-15 03:31:18,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 650 states, 649 states have (on average 3.362095531587057) internal successors, (2182), 649 states have internal predecessors, (2182), 0 states have call successors, (0), 0 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 03:31:18,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 650 states to 650 states and 2182 transitions. [2021-04-15 03:31:18,374 INFO L78 Accepts]: Start accepts. Automaton has 650 states and 2182 transitions. Word has length 22 [2021-04-15 03:31:18,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:31:18,374 INFO L480 AbstractCegarLoop]: Abstraction has 650 states and 2182 transitions. [2021-04-15 03:31:18,375 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:31:18,375 INFO L276 IsEmpty]: Start isEmpty. Operand 650 states and 2182 transitions. [2021-04-15 03:31:18,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 03:31:18,377 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:31:18,377 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] [2021-04-15 03:31:18,600 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2021-04-15 03:31:18,601 INFO L428 AbstractCegarLoop]: === Iteration 64 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 03:31:18,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:31:18,601 INFO L82 PathProgramCache]: Analyzing trace with hash -1657114921, now seen corresponding path program 29 times [2021-04-15 03:31:18,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:31:18,601 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438201488] [2021-04-15 03:31:18,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:31:18,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:31:18,623 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 03:31:18,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438201488] [2021-04-15 03:31:18,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034057593] [2021-04-15 03:31:18,623 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:31:18,651 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 03:31:18,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:31:18,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-04-15 03:31:18,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:31:18,726 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 03:31:18,726 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:31:18,726 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-04-15 03:31:18,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220023281] [2021-04-15 03:31:18,727 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 03:31:18,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:31:18,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 03:31:18,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-04-15 03:31:18,728 INFO L87 Difference]: Start difference. First operand 650 states and 2182 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:31:18,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:31:18,928 INFO L93 Difference]: Finished difference Result 1386 states and 4279 transitions. [2021-04-15 03:31:18,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 03:31:18,929 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 03:31:18,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:31:18,933 INFO L225 Difference]: With dead ends: 1386 [2021-04-15 03:31:18,933 INFO L226 Difference]: Without dead ends: 1386 [2021-04-15 03:31:18,934 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 115.0ms TimeCoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2021-04-15 03:31:18,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1386 states. [2021-04-15 03:31:18,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1386 to 762. [2021-04-15 03:31:18,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 762 states, 761 states have (on average 3.4480946123521683) internal successors, (2624), 761 states have internal predecessors, (2624), 0 states have call successors, (0), 0 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 03:31:18,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 762 states to 762 states and 2624 transitions. [2021-04-15 03:31:18,959 INFO L78 Accepts]: Start accepts. Automaton has 762 states and 2624 transitions. Word has length 22 [2021-04-15 03:31:18,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:31:18,959 INFO L480 AbstractCegarLoop]: Abstraction has 762 states and 2624 transitions. [2021-04-15 03:31:18,960 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:31:18,960 INFO L276 IsEmpty]: Start isEmpty. Operand 762 states and 2624 transitions. [2021-04-15 03:31:18,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 03:31:18,962 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:31:18,962 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] [2021-04-15 03:31:19,176 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-04-15 03:31:19,177 INFO L428 AbstractCegarLoop]: === Iteration 65 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 03:31:19,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:31:19,177 INFO L82 PathProgramCache]: Analyzing trace with hash 1144148055, now seen corresponding path program 30 times [2021-04-15 03:31:19,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:31:19,177 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963089362] [2021-04-15 03:31:19,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:31:19,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:31:19,200 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 03:31:19,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963089362] [2021-04-15 03:31:19,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330546366] [2021-04-15 03:31:19,200 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:31:19,228 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-04-15 03:31:19,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:31:19,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-04-15 03:31:19,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:31:19,297 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 03:31:19,297 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:31:19,297 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-04-15 03:31:19,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595019917] [2021-04-15 03:31:19,298 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 03:31:19,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:31:19,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 03:31:19,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-04-15 03:31:19,298 INFO L87 Difference]: Start difference. First operand 762 states and 2624 transitions. Second operand has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:31:19,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:31:19,553 INFO L93 Difference]: Finished difference Result 1253 states and 3889 transitions. [2021-04-15 03:31:19,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 03:31:19,554 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 03:31:19,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:31:19,558 INFO L225 Difference]: With dead ends: 1253 [2021-04-15 03:31:19,558 INFO L226 Difference]: Without dead ends: 1244 [2021-04-15 03:31:19,559 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 166.7ms TimeCoverageRelationStatistics Valid=165, Invalid=297, Unknown=0, NotChecked=0, Total=462 [2021-04-15 03:31:19,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1244 states. [2021-04-15 03:31:19,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1244 to 762. [2021-04-15 03:31:19,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 762 states, 761 states have (on average 3.4191852825229962) internal successors, (2602), 761 states have internal predecessors, (2602), 0 states have call successors, (0), 0 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 03:31:19,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 762 states to 762 states and 2602 transitions. [2021-04-15 03:31:19,579 INFO L78 Accepts]: Start accepts. Automaton has 762 states and 2602 transitions. Word has length 22 [2021-04-15 03:31:19,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:31:19,580 INFO L480 AbstractCegarLoop]: Abstraction has 762 states and 2602 transitions. [2021-04-15 03:31:19,580 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:31:19,580 INFO L276 IsEmpty]: Start isEmpty. Operand 762 states and 2602 transitions. [2021-04-15 03:31:19,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 03:31:19,581 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:31:19,582 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] [2021-04-15 03:31:19,799 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-04-15 03:31:19,799 INFO L428 AbstractCegarLoop]: === Iteration 66 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 03:31:19,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:31:19,799 INFO L82 PathProgramCache]: Analyzing trace with hash 1294632791, now seen corresponding path program 31 times [2021-04-15 03:31:19,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:31:19,800 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941426552] [2021-04-15 03:31:19,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:31:19,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:31:19,831 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 03:31:19,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941426552] [2021-04-15 03:31:19,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117764768] [2021-04-15 03:31:19,832 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:31:19,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:31:19,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-04-15 03:31:19,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:31:19,935 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 03:31:19,935 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:31:19,935 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-04-15 03:31:19,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290598276] [2021-04-15 03:31:19,935 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 03:31:19,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:31:19,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 03:31:19,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-04-15 03:31:19,936 INFO L87 Difference]: Start difference. First operand 762 states and 2602 transitions. Second operand has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:31:20,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:31:20,120 INFO L93 Difference]: Finished difference Result 1263 states and 4021 transitions. [2021-04-15 03:31:20,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 03:31:20,120 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 03:31:20,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:31:20,125 INFO L225 Difference]: With dead ends: 1263 [2021-04-15 03:31:20,125 INFO L226 Difference]: Without dead ends: 1251 [2021-04-15 03:31:20,125 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 142.3ms TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2021-04-15 03:31:20,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1251 states. [2021-04-15 03:31:20,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1251 to 847. [2021-04-15 03:31:20,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 847 states, 846 states have (on average 3.4539007092198584) internal successors, (2922), 846 states have internal predecessors, (2922), 0 states have call successors, (0), 0 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 03:31:20,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 847 states to 847 states and 2922 transitions. [2021-04-15 03:31:20,150 INFO L78 Accepts]: Start accepts. Automaton has 847 states and 2922 transitions. Word has length 22 [2021-04-15 03:31:20,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:31:20,150 INFO L480 AbstractCegarLoop]: Abstraction has 847 states and 2922 transitions. [2021-04-15 03:31:20,151 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:31:20,151 INFO L276 IsEmpty]: Start isEmpty. Operand 847 states and 2922 transitions. [2021-04-15 03:31:20,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 03:31:20,153 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:31:20,153 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] [2021-04-15 03:31:20,372 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:31:20,373 INFO L428 AbstractCegarLoop]: === Iteration 67 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 03:31:20,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:31:20,373 INFO L82 PathProgramCache]: Analyzing trace with hash -1456964799, now seen corresponding path program 32 times [2021-04-15 03:31:20,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:31:20,373 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239065138] [2021-04-15 03:31:20,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:31:20,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:31:20,406 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 03:31:20,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239065138] [2021-04-15 03:31:20,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133082094] [2021-04-15 03:31:20,409 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:31:20,447 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 03:31:20,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:31:20,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-04-15 03:31:20,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:31:20,525 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 03:31:20,526 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:31:20,526 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-04-15 03:31:20,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562742694] [2021-04-15 03:31:20,526 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 03:31:20,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:31:20,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 03:31:20,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-04-15 03:31:20,527 INFO L87 Difference]: Start difference. First operand 847 states and 2922 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:31:20,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:31:20,745 INFO L93 Difference]: Finished difference Result 1246 states and 3991 transitions. [2021-04-15 03:31:20,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 03:31:20,745 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 03:31:20,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:31:20,751 INFO L225 Difference]: With dead ends: 1246 [2021-04-15 03:31:20,751 INFO L226 Difference]: Without dead ends: 1246 [2021-04-15 03:31:20,751 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 129.1ms TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2021-04-15 03:31:20,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1246 states. [2021-04-15 03:31:20,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1246 to 888. [2021-04-15 03:31:20,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 888 states, 887 states have (on average 3.47576099210823) internal successors, (3083), 887 states have internal predecessors, (3083), 0 states have call successors, (0), 0 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 03:31:20,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 3083 transitions. [2021-04-15 03:31:20,775 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 3083 transitions. Word has length 22 [2021-04-15 03:31:20,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:31:20,775 INFO L480 AbstractCegarLoop]: Abstraction has 888 states and 3083 transitions. [2021-04-15 03:31:20,775 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:31:20,776 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 3083 transitions. [2021-04-15 03:31:20,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 03:31:20,778 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:31:20,778 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] [2021-04-15 03:31:21,003 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:31:21,003 INFO L428 AbstractCegarLoop]: === Iteration 68 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 03:31:21,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:31:21,004 INFO L82 PathProgramCache]: Analyzing trace with hash -1570199292, now seen corresponding path program 33 times [2021-04-15 03:31:21,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:31:21,004 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134782215] [2021-04-15 03:31:21,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:31:21,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:31:21,038 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 03:31:21,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134782215] [2021-04-15 03:31:21,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674336905] [2021-04-15 03:31:21,038 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:31:21,071 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 03:31:21,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:31:21,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-04-15 03:31:21,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:31:21,147 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 03:31:21,147 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:31:21,147 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-04-15 03:31:21,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369537876] [2021-04-15 03:31:21,148 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 03:31:21,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:31:21,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 03:31:21,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-04-15 03:31:21,148 INFO L87 Difference]: Start difference. First operand 888 states and 3083 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:31:21,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:31:21,452 INFO L93 Difference]: Finished difference Result 1362 states and 4328 transitions. [2021-04-15 03:31:21,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 03:31:21,453 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 03:31:21,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:31:21,457 INFO L225 Difference]: With dead ends: 1362 [2021-04-15 03:31:21,457 INFO L226 Difference]: Without dead ends: 1275 [2021-04-15 03:31:21,458 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 213.4ms TimeCoverageRelationStatistics Valid=198, Invalid=402, Unknown=0, NotChecked=0, Total=600 [2021-04-15 03:31:21,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1275 states. [2021-04-15 03:31:21,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1275 to 976. [2021-04-15 03:31:21,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 976 states, 975 states have (on average 3.4574358974358974) internal successors, (3371), 975 states have internal predecessors, (3371), 0 states have call successors, (0), 0 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 03:31:21,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 976 states to 976 states and 3371 transitions. [2021-04-15 03:31:21,492 INFO L78 Accepts]: Start accepts. Automaton has 976 states and 3371 transitions. Word has length 22 [2021-04-15 03:31:21,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:31:21,492 INFO L480 AbstractCegarLoop]: Abstraction has 976 states and 3371 transitions. [2021-04-15 03:31:21,492 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:31:21,492 INFO L276 IsEmpty]: Start isEmpty. Operand 976 states and 3371 transitions. [2021-04-15 03:31:21,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 03:31:21,494 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:31:21,495 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] [2021-04-15 03:31:21,715 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:31:21,716 INFO L428 AbstractCegarLoop]: === Iteration 69 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 03:31:21,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:31:21,716 INFO L82 PathProgramCache]: Analyzing trace with hash -1138465271, now seen corresponding path program 34 times [2021-04-15 03:31:21,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:31:21,716 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912360692] [2021-04-15 03:31:21,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:31:21,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:31:21,741 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 03:31:21,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912360692] [2021-04-15 03:31:21,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92060772] [2021-04-15 03:31:21,741 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:31:21,780 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 03:31:21,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:31:21,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-04-15 03:31:21,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:31:21,850 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 03:31:21,851 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:31:21,851 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-04-15 03:31:21,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062841204] [2021-04-15 03:31:21,851 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 03:31:21,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:31:21,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 03:31:21,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-04-15 03:31:21,852 INFO L87 Difference]: Start difference. First operand 976 states and 3371 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 03:31:22,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:31:22,034 INFO L93 Difference]: Finished difference Result 1340 states and 4319 transitions. [2021-04-15 03:31:22,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 03:31:22,034 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 22 [2021-04-15 03:31:22,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:31:22,037 INFO L225 Difference]: With dead ends: 1340 [2021-04-15 03:31:22,038 INFO L226 Difference]: Without dead ends: 1331 [2021-04-15 03:31:22,038 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 105.0ms TimeCoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2021-04-15 03:31:22,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1331 states. [2021-04-15 03:31:22,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1331 to 928. [2021-04-15 03:31:22,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 928 states, 927 states have (on average 3.4217907227615965) internal successors, (3172), 927 states have internal predecessors, (3172), 0 states have call successors, (0), 0 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 03:31:22,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 928 states to 928 states and 3172 transitions. [2021-04-15 03:31:22,060 INFO L78 Accepts]: Start accepts. Automaton has 928 states and 3172 transitions. Word has length 22 [2021-04-15 03:31:22,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:31:22,061 INFO L480 AbstractCegarLoop]: Abstraction has 928 states and 3172 transitions. [2021-04-15 03:31:22,061 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 03:31:22,061 INFO L276 IsEmpty]: Start isEmpty. Operand 928 states and 3172 transitions. [2021-04-15 03:31:22,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 03:31:22,063 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:31:22,063 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] [2021-04-15 03:31:22,284 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:31:22,285 INFO L428 AbstractCegarLoop]: === Iteration 70 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 03:31:22,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:31:22,285 INFO L82 PathProgramCache]: Analyzing trace with hash -1510891700, now seen corresponding path program 35 times [2021-04-15 03:31:22,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:31:22,285 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933485831] [2021-04-15 03:31:22,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:31:22,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:31:22,323 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 03:31:22,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933485831] [2021-04-15 03:31:22,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46080792] [2021-04-15 03:31:22,325 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:31:22,350 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-04-15 03:31:22,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:31:22,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-04-15 03:31:22,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:31:22,438 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:31:22,439 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:31:22,439 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-04-15 03:31:22,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638276998] [2021-04-15 03:31:22,439 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 03:31:22,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:31:22,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 03:31:22,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-04-15 03:31:22,440 INFO L87 Difference]: Start difference. First operand 928 states and 3172 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 03:31:22,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:31:22,575 INFO L93 Difference]: Finished difference Result 1477 states and 4669 transitions. [2021-04-15 03:31:22,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 03:31:22,575 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 22 [2021-04-15 03:31:22,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:31:22,579 INFO L225 Difference]: With dead ends: 1477 [2021-04-15 03:31:22,579 INFO L226 Difference]: Without dead ends: 1435 [2021-04-15 03:31:22,580 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 93.1ms TimeCoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2021-04-15 03:31:22,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1435 states. [2021-04-15 03:31:22,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1435 to 1075. [2021-04-15 03:31:22,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1075 states, 1074 states have (on average 3.4320297951582868) internal successors, (3686), 1074 states have internal predecessors, (3686), 0 states have call successors, (0), 0 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 03:31:22,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1075 states to 1075 states and 3686 transitions. [2021-04-15 03:31:22,613 INFO L78 Accepts]: Start accepts. Automaton has 1075 states and 3686 transitions. Word has length 22 [2021-04-15 03:31:22,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:31:22,613 INFO L480 AbstractCegarLoop]: Abstraction has 1075 states and 3686 transitions. [2021-04-15 03:31:22,613 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 03:31:22,613 INFO L276 IsEmpty]: Start isEmpty. Operand 1075 states and 3686 transitions. [2021-04-15 03:31:22,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 03:31:22,615 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:31:22,616 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] [2021-04-15 03:31:22,836 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-04-15 03:31:22,837 INFO L428 AbstractCegarLoop]: === Iteration 71 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 03:31:22,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:31:22,837 INFO L82 PathProgramCache]: Analyzing trace with hash 1381268681, now seen corresponding path program 36 times [2021-04-15 03:31:22,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:31:22,837 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653741050] [2021-04-15 03:31:22,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:31:22,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:31:22,862 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 03:31:22,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653741050] [2021-04-15 03:31:22,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642128178] [2021-04-15 03:31:22,863 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 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:31:22,896 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 03:31:22,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:31:22,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-04-15 03:31:22,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:31:22,970 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 03:31:22,970 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:31:22,970 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-04-15 03:31:22,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763393609] [2021-04-15 03:31:22,971 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 03:31:22,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:31:22,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 03:31:22,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-04-15 03:31:22,971 INFO L87 Difference]: Start difference. First operand 1075 states and 3686 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:31:23,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:31:23,116 INFO L93 Difference]: Finished difference Result 1825 states and 5875 transitions. [2021-04-15 03:31:23,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 03:31:23,117 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 03:31:23,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:31:23,122 INFO L225 Difference]: With dead ends: 1825 [2021-04-15 03:31:23,122 INFO L226 Difference]: Without dead ends: 1825 [2021-04-15 03:31:23,122 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 87.4ms TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-04-15 03:31:23,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1825 states. [2021-04-15 03:31:23,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1825 to 1237. [2021-04-15 03:31:23,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1237 states, 1236 states have (on average 3.5032362459546924) internal successors, (4330), 1236 states have internal predecessors, (4330), 0 states have call successors, (0), 0 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 03:31:23,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1237 states to 1237 states and 4330 transitions. [2021-04-15 03:31:23,159 INFO L78 Accepts]: Start accepts. Automaton has 1237 states and 4330 transitions. Word has length 22 [2021-04-15 03:31:23,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:31:23,159 INFO L480 AbstractCegarLoop]: Abstraction has 1237 states and 4330 transitions. [2021-04-15 03:31:23,159 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:31:23,159 INFO L276 IsEmpty]: Start isEmpty. Operand 1237 states and 4330 transitions. [2021-04-15 03:31:23,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 03:31:23,163 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:31:23,163 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] [2021-04-15 03:31:23,386 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-04-15 03:31:23,386 INFO L428 AbstractCegarLoop]: === Iteration 72 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 03:31:23,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:31:23,387 INFO L82 PathProgramCache]: Analyzing trace with hash 495943756, now seen corresponding path program 37 times [2021-04-15 03:31:23,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:31:23,387 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642642055] [2021-04-15 03:31:23,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:31:23,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:31:23,412 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 03:31:23,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642642055] [2021-04-15 03:31:23,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864699454] [2021-04-15 03:31:23,412 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:31:23,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:31:23,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-04-15 03:31:23,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:31:23,518 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 03:31:23,519 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:31:23,519 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-04-15 03:31:23,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450634959] [2021-04-15 03:31:23,519 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 03:31:23,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:31:23,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 03:31:23,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-04-15 03:31:23,520 INFO L87 Difference]: Start difference. First operand 1237 states and 4330 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:31:23,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:31:23,735 INFO L93 Difference]: Finished difference Result 1507 states and 5030 transitions. [2021-04-15 03:31:23,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 03:31:23,735 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 03:31:23,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:31:23,738 INFO L225 Difference]: With dead ends: 1507 [2021-04-15 03:31:23,738 INFO L226 Difference]: Without dead ends: 1464 [2021-04-15 03:31:23,739 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 139.4ms TimeCoverageRelationStatistics Valid=135, Invalid=285, Unknown=0, NotChecked=0, Total=420 [2021-04-15 03:31:23,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1464 states. [2021-04-15 03:31:23,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1464 to 1278. [2021-04-15 03:31:23,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1278 states, 1277 states have (on average 3.534064212999217) internal successors, (4513), 1277 states have internal predecessors, (4513), 0 states have call successors, (0), 0 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 03:31:23,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1278 states to 1278 states and 4513 transitions. [2021-04-15 03:31:23,761 INFO L78 Accepts]: Start accepts. Automaton has 1278 states and 4513 transitions. Word has length 22 [2021-04-15 03:31:23,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:31:23,761 INFO L480 AbstractCegarLoop]: Abstraction has 1278 states and 4513 transitions. [2021-04-15 03:31:23,761 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:31:23,761 INFO L276 IsEmpty]: Start isEmpty. Operand 1278 states and 4513 transitions. [2021-04-15 03:31:23,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 03:31:23,764 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:31:23,764 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] [2021-04-15 03:31:23,965 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-04-15 03:31:23,965 INFO L428 AbstractCegarLoop]: === Iteration 73 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 03:31:23,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:31:23,966 INFO L82 PathProgramCache]: Analyzing trace with hash -112435639, now seen corresponding path program 38 times [2021-04-15 03:31:23,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:31:23,966 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950944589] [2021-04-15 03:31:23,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:31:23,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:31:23,989 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 03:31:23,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950944589] [2021-04-15 03:31:23,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935936] [2021-04-15 03:31:23,989 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 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:31:24,027 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 03:31:24,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:31:24,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-04-15 03:31:24,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:31:24,089 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 03:31:24,089 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:31:24,089 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-04-15 03:31:24,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356170220] [2021-04-15 03:31:24,089 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 03:31:24,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:31:24,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 03:31:24,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-04-15 03:31:24,090 INFO L87 Difference]: Start difference. First operand 1278 states and 4513 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 03:31:24,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:31:24,279 INFO L93 Difference]: Finished difference Result 1841 states and 5998 transitions. [2021-04-15 03:31:24,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 03:31:24,280 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 22 [2021-04-15 03:31:24,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:31:24,284 INFO L225 Difference]: With dead ends: 1841 [2021-04-15 03:31:24,284 INFO L226 Difference]: Without dead ends: 1832 [2021-04-15 03:31:24,284 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 95.7ms TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2021-04-15 03:31:24,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1832 states. [2021-04-15 03:31:24,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1832 to 1224. [2021-04-15 03:31:24,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1224 states, 1223 states have (on average 3.493049877350777) internal successors, (4272), 1223 states have internal predecessors, (4272), 0 states have call successors, (0), 0 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 03:31:24,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1224 states to 1224 states and 4272 transitions. [2021-04-15 03:31:24,309 INFO L78 Accepts]: Start accepts. Automaton has 1224 states and 4272 transitions. Word has length 22 [2021-04-15 03:31:24,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:31:24,309 INFO L480 AbstractCegarLoop]: Abstraction has 1224 states and 4272 transitions. [2021-04-15 03:31:24,309 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 03:31:24,309 INFO L276 IsEmpty]: Start isEmpty. Operand 1224 states and 4272 transitions. [2021-04-15 03:31:24,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 03:31:24,312 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:31:24,312 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] [2021-04-15 03:31:24,512 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:31:24,512 INFO L428 AbstractCegarLoop]: === Iteration 74 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 03:31:24,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:31:24,513 INFO L82 PathProgramCache]: Analyzing trace with hash 38049097, now seen corresponding path program 39 times [2021-04-15 03:31:24,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:31:24,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599599406] [2021-04-15 03:31:24,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:31:24,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:31:24,540 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 03:31:24,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599599406] [2021-04-15 03:31:24,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125525774] [2021-04-15 03:31:24,540 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 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:31:24,564 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 03:31:24,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:31:24,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-04-15 03:31:24,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:31:24,630 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 03:31:24,630 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:31:24,630 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-04-15 03:31:24,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386030768] [2021-04-15 03:31:24,630 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 03:31:24,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:31:24,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 03:31:24,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-04-15 03:31:24,631 INFO L87 Difference]: Start difference. First operand 1224 states and 4272 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 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 03:31:24,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:31:24,834 INFO L93 Difference]: Finished difference Result 1811 states and 5904 transitions. [2021-04-15 03:31:24,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 03:31:24,834 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 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 03:31:24,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:31:24,838 INFO L225 Difference]: With dead ends: 1811 [2021-04-15 03:31:24,838 INFO L226 Difference]: Without dead ends: 1799 [2021-04-15 03:31:24,838 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 132.2ms TimeCoverageRelationStatistics Valid=118, Invalid=302, Unknown=0, NotChecked=0, Total=420 [2021-04-15 03:31:24,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1799 states. [2021-04-15 03:31:24,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1799 to 1222. [2021-04-15 03:31:24,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1222 states, 1221 states have (on average 3.493038493038493) internal successors, (4265), 1221 states have internal predecessors, (4265), 0 states have call successors, (0), 0 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 03:31:24,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1222 states to 1222 states and 4265 transitions. [2021-04-15 03:31:24,865 INFO L78 Accepts]: Start accepts. Automaton has 1222 states and 4265 transitions. Word has length 22 [2021-04-15 03:31:24,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:31:24,865 INFO L480 AbstractCegarLoop]: Abstraction has 1222 states and 4265 transitions. [2021-04-15 03:31:24,865 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 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 03:31:24,866 INFO L276 IsEmpty]: Start isEmpty. Operand 1222 states and 4265 transitions. [2021-04-15 03:31:24,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 03:31:24,869 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:31:24,869 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] [2021-04-15 03:31:25,079 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-04-15 03:31:25,080 INFO L428 AbstractCegarLoop]: === Iteration 75 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 03:31:25,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:31:25,080 INFO L82 PathProgramCache]: Analyzing trace with hash 414299473, now seen corresponding path program 40 times [2021-04-15 03:31:25,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:31:25,081 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542342994] [2021-04-15 03:31:25,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:31:25,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:31:25,110 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 03:31:25,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542342994] [2021-04-15 03:31:25,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850999660] [2021-04-15 03:31:25,111 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 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:31:25,146 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 03:31:25,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:31:25,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-04-15 03:31:25,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:31:25,209 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 03:31:25,209 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:31:25,209 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-04-15 03:31:25,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135549063] [2021-04-15 03:31:25,209 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 03:31:25,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:31:25,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 03:31:25,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-04-15 03:31:25,210 INFO L87 Difference]: Start difference. First operand 1222 states and 4265 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:31:25,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:31:25,364 INFO L93 Difference]: Finished difference Result 2184 states and 7117 transitions. [2021-04-15 03:31:25,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 03:31:25,365 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 03:31:25,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:31:25,369 INFO L225 Difference]: With dead ends: 2184 [2021-04-15 03:31:25,370 INFO L226 Difference]: Without dead ends: 2184 [2021-04-15 03:31:25,370 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 84.4ms TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-04-15 03:31:25,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2184 states. [2021-04-15 03:31:25,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2184 to 1282. [2021-04-15 03:31:25,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1282 states, 1281 states have (on average 3.527712724434036) internal successors, (4519), 1281 states have internal predecessors, (4519), 0 states have call successors, (0), 0 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 03:31:25,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1282 states to 1282 states and 4519 transitions. [2021-04-15 03:31:25,398 INFO L78 Accepts]: Start accepts. Automaton has 1282 states and 4519 transitions. Word has length 22 [2021-04-15 03:31:25,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:31:25,399 INFO L480 AbstractCegarLoop]: Abstraction has 1282 states and 4519 transitions. [2021-04-15 03:31:25,399 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:31:25,399 INFO L276 IsEmpty]: Start isEmpty. Operand 1282 states and 4519 transitions. [2021-04-15 03:31:25,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 03:31:25,401 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:31:25,401 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] [2021-04-15 03:31:25,601 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:31:25,602 INFO L428 AbstractCegarLoop]: === Iteration 76 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 03:31:25,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:31:25,602 INFO L82 PathProgramCache]: Analyzing trace with hash -254499376, now seen corresponding path program 41 times [2021-04-15 03:31:25,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:31:25,602 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050281301] [2021-04-15 03:31:25,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:31:25,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:31:25,633 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 03:31:25,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050281301] [2021-04-15 03:31:25,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335256980] [2021-04-15 03:31:25,633 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 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:31:25,665 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-04-15 03:31:25,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:31:25,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-04-15 03:31:25,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:31:25,731 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 03:31:25,732 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:31:25,732 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-04-15 03:31:25,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311308082] [2021-04-15 03:31:25,733 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 03:31:25,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:31:25,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 03:31:25,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-04-15 03:31:25,733 INFO L87 Difference]: Start difference. First operand 1282 states and 4519 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:31:26,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:31:26,051 INFO L93 Difference]: Finished difference Result 1724 states and 5684 transitions. [2021-04-15 03:31:26,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 03:31:26,052 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 03:31:26,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:31:26,057 INFO L225 Difference]: With dead ends: 1724 [2021-04-15 03:31:26,057 INFO L226 Difference]: Without dead ends: 1690 [2021-04-15 03:31:26,057 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 165.2ms TimeCoverageRelationStatistics Valid=168, Invalid=294, Unknown=0, NotChecked=0, Total=462 [2021-04-15 03:31:26,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1690 states. [2021-04-15 03:31:26,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1690 to 1281. [2021-04-15 03:31:26,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1281 states, 1280 states have (on average 3.51484375) internal successors, (4499), 1280 states have internal predecessors, (4499), 0 states have call successors, (0), 0 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 03:31:26,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1281 states to 1281 states and 4499 transitions. [2021-04-15 03:31:26,093 INFO L78 Accepts]: Start accepts. Automaton has 1281 states and 4499 transitions. Word has length 22 [2021-04-15 03:31:26,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:31:26,093 INFO L480 AbstractCegarLoop]: Abstraction has 1281 states and 4499 transitions. [2021-04-15 03:31:26,093 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:31:26,093 INFO L276 IsEmpty]: Start isEmpty. Operand 1281 states and 4499 transitions. [2021-04-15 03:31:26,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 03:31:26,096 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:31:26,096 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] [2021-04-15 03:31:26,312 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-04-15 03:31:26,313 INFO L428 AbstractCegarLoop]: === Iteration 77 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 03:31:26,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:31:26,313 INFO L82 PathProgramCache]: Analyzing trace with hash -811023835, now seen corresponding path program 42 times [2021-04-15 03:31:26,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:31:26,313 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570685398] [2021-04-15 03:31:26,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:31:26,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:31:26,345 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 03:31:26,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570685398] [2021-04-15 03:31:26,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386899691] [2021-04-15 03:31:26,346 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 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:31:26,375 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-04-15 03:31:26,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:31:26,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-04-15 03:31:26,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:31:26,440 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 03:31:26,440 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:31:26,440 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-04-15 03:31:26,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816008193] [2021-04-15 03:31:26,440 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 03:31:26,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:31:26,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 03:31:26,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-04-15 03:31:26,441 INFO L87 Difference]: Start difference. First operand 1281 states and 4499 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:31:26,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:31:26,723 INFO L93 Difference]: Finished difference Result 2125 states and 6947 transitions. [2021-04-15 03:31:26,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 03:31:26,724 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 03:31:26,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:31:26,729 INFO L225 Difference]: With dead ends: 2125 [2021-04-15 03:31:26,729 INFO L226 Difference]: Without dead ends: 2116 [2021-04-15 03:31:26,729 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 150.5ms TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2021-04-15 03:31:26,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2116 states. [2021-04-15 03:31:26,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2116 to 1245. [2021-04-15 03:31:26,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1245 states, 1244 states have (on average 3.485530546623794) internal successors, (4336), 1244 states have internal predecessors, (4336), 0 states have call successors, (0), 0 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 03:31:26,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1245 states to 1245 states and 4336 transitions. [2021-04-15 03:31:26,770 INFO L78 Accepts]: Start accepts. Automaton has 1245 states and 4336 transitions. Word has length 22 [2021-04-15 03:31:26,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:31:26,770 INFO L480 AbstractCegarLoop]: Abstraction has 1245 states and 4336 transitions. [2021-04-15 03:31:26,770 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:31:26,771 INFO L276 IsEmpty]: Start isEmpty. Operand 1245 states and 4336 transitions. [2021-04-15 03:31:26,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 03:31:26,774 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:31:26,774 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] [2021-04-15 03:31:26,976 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable119 [2021-04-15 03:31:26,977 INFO L428 AbstractCegarLoop]: === Iteration 78 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 03:31:26,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:31:26,977 INFO L82 PathProgramCache]: Analyzing trace with hash -1183450264, now seen corresponding path program 43 times [2021-04-15 03:31:26,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:31:26,977 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180716777] [2021-04-15 03:31:26,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:31:26,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:31:27,007 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 03:31:27,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180716777] [2021-04-15 03:31:27,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835291289] [2021-04-15 03:31:27,008 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 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:31:27,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:31:27,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-04-15 03:31:27,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:31:27,090 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 03:31:27,091 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:31:27,091 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-04-15 03:31:27,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832332231] [2021-04-15 03:31:27,091 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 03:31:27,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:31:27,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 03:31:27,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-04-15 03:31:27,092 INFO L87 Difference]: Start difference. First operand 1245 states and 4336 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:31:27,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:31:27,232 INFO L93 Difference]: Finished difference Result 1497 states and 4889 transitions. [2021-04-15 03:31:27,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 03:31:27,233 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 03:31:27,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:31:27,235 INFO L225 Difference]: With dead ends: 1497 [2021-04-15 03:31:27,235 INFO L226 Difference]: Without dead ends: 1497 [2021-04-15 03:31:27,235 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 88.2ms TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2021-04-15 03:31:27,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1497 states. [2021-04-15 03:31:27,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1497 to 1200. [2021-04-15 03:31:27,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1200 states, 1199 states have (on average 3.433694745621351) internal successors, (4117), 1199 states have internal predecessors, (4117), 0 states have call successors, (0), 0 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 03:31:27,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1200 states to 1200 states and 4117 transitions. [2021-04-15 03:31:27,256 INFO L78 Accepts]: Start accepts. Automaton has 1200 states and 4117 transitions. Word has length 22 [2021-04-15 03:31:27,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:31:27,256 INFO L480 AbstractCegarLoop]: Abstraction has 1200 states and 4117 transitions. [2021-04-15 03:31:27,256 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:31:27,257 INFO L276 IsEmpty]: Start isEmpty. Operand 1200 states and 4117 transitions. [2021-04-15 03:31:27,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 03:31:27,258 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:31:27,259 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] [2021-04-15 03:31:27,459 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:31:27,459 INFO L428 AbstractCegarLoop]: === Iteration 79 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 03:31:27,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:31:27,459 INFO L82 PathProgramCache]: Analyzing trace with hash -496279263, now seen corresponding path program 44 times [2021-04-15 03:31:27,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:31:27,460 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762274380] [2021-04-15 03:31:27,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:31:27,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:31:27,484 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 03:31:27,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762274380] [2021-04-15 03:31:27,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461179459] [2021-04-15 03:31:27,485 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 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:31:27,508 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 03:31:27,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:31:27,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-04-15 03:31:27,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:31:27,566 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 03:31:27,567 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:31:27,567 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-04-15 03:31:27,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351256442] [2021-04-15 03:31:27,567 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 03:31:27,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:31:27,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 03:31:27,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-04-15 03:31:27,568 INFO L87 Difference]: Start difference. First operand 1200 states and 4117 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:31:27,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:31:27,761 INFO L93 Difference]: Finished difference Result 1698 states and 5519 transitions. [2021-04-15 03:31:27,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 03:31:27,762 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 03:31:27,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:31:27,765 INFO L225 Difference]: With dead ends: 1698 [2021-04-15 03:31:27,765 INFO L226 Difference]: Without dead ends: 1690 [2021-04-15 03:31:27,765 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 127.0ms TimeCoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2021-04-15 03:31:27,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1690 states. [2021-04-15 03:31:27,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1690 to 1200. [2021-04-15 03:31:27,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1200 states, 1199 states have (on average 3.4286905754795662) internal successors, (4111), 1199 states have internal predecessors, (4111), 0 states have call successors, (0), 0 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 03:31:27,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1200 states to 1200 states and 4111 transitions. [2021-04-15 03:31:27,819 INFO L78 Accepts]: Start accepts. Automaton has 1200 states and 4111 transitions. Word has length 22 [2021-04-15 03:31:27,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:31:27,819 INFO L480 AbstractCegarLoop]: Abstraction has 1200 states and 4111 transitions. [2021-04-15 03:31:27,819 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:31:27,819 INFO L276 IsEmpty]: Start isEmpty. Operand 1200 states and 4111 transitions. [2021-04-15 03:31:27,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 03:31:27,822 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:31:27,822 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] [2021-04-15 03:31:28,036 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:31:28,037 INFO L428 AbstractCegarLoop]: === Iteration 80 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 03:31:28,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:31:28,037 INFO L82 PathProgramCache]: Analyzing trace with hash -1029973939, now seen corresponding path program 45 times [2021-04-15 03:31:28,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:31:28,037 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269720740] [2021-04-15 03:31:28,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:31:28,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:31:28,065 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 03:31:28,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269720740] [2021-04-15 03:31:28,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171330580] [2021-04-15 03:31:28,065 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 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:31:28,108 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 03:31:28,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:31:28,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-04-15 03:31:28,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:31:28,166 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 03:31:28,166 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:31:28,166 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-04-15 03:31:28,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373502211] [2021-04-15 03:31:28,166 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 03:31:28,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:31:28,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 03:31:28,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-04-15 03:31:28,167 INFO L87 Difference]: Start difference. First operand 1200 states and 4111 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:31:28,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:31:28,261 INFO L93 Difference]: Finished difference Result 1428 states and 4807 transitions. [2021-04-15 03:31:28,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-04-15 03:31:28,262 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 03:31:28,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:31:28,266 INFO L225 Difference]: With dead ends: 1428 [2021-04-15 03:31:28,266 INFO L226 Difference]: Without dead ends: 1419 [2021-04-15 03:31:28,266 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 68.6ms TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-04-15 03:31:28,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1419 states. [2021-04-15 03:31:28,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1419 to 1199. [2021-04-15 03:31:28,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1199 states, 1198 states have (on average 3.4298831385642736) internal successors, (4109), 1198 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 03:31:28,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1199 states to 1199 states and 4109 transitions. [2021-04-15 03:31:28,294 INFO L78 Accepts]: Start accepts. Automaton has 1199 states and 4109 transitions. Word has length 22 [2021-04-15 03:31:28,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:31:28,294 INFO L480 AbstractCegarLoop]: Abstraction has 1199 states and 4109 transitions. [2021-04-15 03:31:28,294 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:31:28,294 INFO L276 IsEmpty]: Start isEmpty. Operand 1199 states and 4109 transitions. [2021-04-15 03:31:28,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 03:31:28,297 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:31:28,297 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] [2021-04-15 03:31:28,522 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-04-15 03:31:28,522 INFO L428 AbstractCegarLoop]: === Iteration 81 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 03:31:28,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:31:28,523 INFO L82 PathProgramCache]: Analyzing trace with hash -736606674, now seen corresponding path program 46 times [2021-04-15 03:31:28,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:31:28,523 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769593870] [2021-04-15 03:31:28,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:31:28,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:31:28,551 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 03:31:28,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769593870] [2021-04-15 03:31:28,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479920133] [2021-04-15 03:31:28,552 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 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:31:28,581 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 03:31:28,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:31:28,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-04-15 03:31:28,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:31:28,636 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 03:31:28,636 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:31:28,636 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-04-15 03:31:28,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652611860] [2021-04-15 03:31:28,636 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 03:31:28,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:31:28,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 03:31:28,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-04-15 03:31:28,637 INFO L87 Difference]: Start difference. First operand 1199 states and 4109 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:31:28,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:31:28,719 INFO L93 Difference]: Finished difference Result 1470 states and 4948 transitions. [2021-04-15 03:31:28,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 03:31:28,719 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 03:31:28,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:31:28,723 INFO L225 Difference]: With dead ends: 1470 [2021-04-15 03:31:28,723 INFO L226 Difference]: Without dead ends: 1470 [2021-04-15 03:31:28,723 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 59.4ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-04-15 03:31:28,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1470 states. [2021-04-15 03:31:28,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1470 to 1208. [2021-04-15 03:31:28,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1208 states, 1207 states have (on average 3.432477216238608) internal successors, (4143), 1207 states have internal predecessors, (4143), 0 states have call successors, (0), 0 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 03:31:28,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1208 states to 1208 states and 4143 transitions. [2021-04-15 03:31:28,751 INFO L78 Accepts]: Start accepts. Automaton has 1208 states and 4143 transitions. Word has length 22 [2021-04-15 03:31:28,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:31:28,751 INFO L480 AbstractCegarLoop]: Abstraction has 1208 states and 4143 transitions. [2021-04-15 03:31:28,751 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:31:28,752 INFO L276 IsEmpty]: Start isEmpty. Operand 1208 states and 4143 transitions. [2021-04-15 03:31:28,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 03:31:28,754 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:31:28,755 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] [2021-04-15 03:31:28,979 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-04-15 03:31:28,979 INFO L428 AbstractCegarLoop]: === Iteration 82 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 03:31:28,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:31:28,979 INFO L82 PathProgramCache]: Analyzing trace with hash -834579384, now seen corresponding path program 47 times [2021-04-15 03:31:28,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:31:28,980 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514647934] [2021-04-15 03:31:28,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:31:28,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:31:29,241 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 03:31:29,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514647934] [2021-04-15 03:31:29,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691298828] [2021-04-15 03:31:29,242 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 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:31:29,266 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-04-15 03:31:29,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:31:29,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-04-15 03:31:29,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:31:29,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-04-15 03:31:29,477 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 03:31:29,480 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 03:31:29,480 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 03:31:29,481 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-04-15 03:31:29,525 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 03:31:29,526 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:31:29,526 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-04-15 03:31:29,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54214224] [2021-04-15 03:31:29,526 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 03:31:29,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:31:29,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 03:31:29,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-04-15 03:31:29,527 INFO L87 Difference]: Start difference. First operand 1208 states and 4143 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 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 03:31:34,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:31:34,059 INFO L93 Difference]: Finished difference Result 4448 states and 15165 transitions. [2021-04-15 03:31:34,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-04-15 03:31:34,060 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 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 24 [2021-04-15 03:31:34,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:31:34,070 INFO L225 Difference]: With dead ends: 4448 [2021-04-15 03:31:34,070 INFO L226 Difference]: Without dead ends: 4426 [2021-04-15 03:31:34,071 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2192 ImplicationChecksByTransitivity, 3534.8ms TimeCoverageRelationStatistics Valid=1022, Invalid=5620, Unknown=0, NotChecked=0, Total=6642 [2021-04-15 03:31:34,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4426 states. [2021-04-15 03:31:34,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4426 to 1303. [2021-04-15 03:31:34,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1303 states, 1302 states have (on average 3.4400921658986174) internal successors, (4479), 1302 states have internal predecessors, (4479), 0 states have call successors, (0), 0 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 03:31:34,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1303 states to 1303 states and 4479 transitions. [2021-04-15 03:31:34,138 INFO L78 Accepts]: Start accepts. Automaton has 1303 states and 4479 transitions. Word has length 24 [2021-04-15 03:31:34,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:31:34,138 INFO L480 AbstractCegarLoop]: Abstraction has 1303 states and 4479 transitions. [2021-04-15 03:31:34,140 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 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 03:31:34,140 INFO L276 IsEmpty]: Start isEmpty. Operand 1303 states and 4479 transitions. [2021-04-15 03:31:34,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 03:31:34,143 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:31:34,143 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] [2021-04-15 03:31:34,356 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-04-15 03:31:34,357 INFO L428 AbstractCegarLoop]: === Iteration 83 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 03:31:34,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:31:34,357 INFO L82 PathProgramCache]: Analyzing trace with hash 965720304, now seen corresponding path program 48 times [2021-04-15 03:31:34,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:31:34,358 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715708542] [2021-04-15 03:31:34,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:31:34,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:31:34,693 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 03:31:34,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715708542] [2021-04-15 03:31:34,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906287330] [2021-04-15 03:31:34,694 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:31:34,720 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-04-15 03:31:34,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:31:34,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 32 conjunts are in the unsatisfiable core [2021-04-15 03:31:34,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:31:34,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 03:31:34,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 03:31:35,005 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 03:31:35,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 53 [2021-04-15 03:31:35,029 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 03:31:35,068 INFO L628 ElimStorePlain]: treesize reduction 48, result has 42.9 percent of original size [2021-04-15 03:31:35,073 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 03:31:35,073 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:41 [2021-04-15 03:31:35,200 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:31:35,200 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:31:35,200 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 21 [2021-04-15 03:31:35,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020103863] [2021-04-15 03:31:35,200 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-04-15 03:31:35,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:31:35,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-04-15 03:31:35,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2021-04-15 03:31:35,201 INFO L87 Difference]: Start difference. First operand 1303 states and 4479 transitions. Second operand has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 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 03:31:37,349 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 40 [2021-04-15 03:31:38,761 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 45 [2021-04-15 03:31:39,045 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 41 [2021-04-15 03:31:39,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:31:39,091 INFO L93 Difference]: Finished difference Result 2829 states and 9372 transitions. [2021-04-15 03:31:39,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-04-15 03:31:39,092 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 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 03:31:39,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:31:39,097 INFO L225 Difference]: With dead ends: 2829 [2021-04-15 03:31:39,097 INFO L226 Difference]: Without dead ends: 2799 [2021-04-15 03:31:39,097 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1118 ImplicationChecksByTransitivity, 3228.5ms TimeCoverageRelationStatistics Valid=661, Invalid=3121, Unknown=0, NotChecked=0, Total=3782 [2021-04-15 03:31:39,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2799 states. [2021-04-15 03:31:39,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2799 to 1316. [2021-04-15 03:31:39,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1316 states, 1315 states have (on average 3.4403041825095055) internal successors, (4524), 1315 states have internal predecessors, (4524), 0 states have call successors, (0), 0 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 03:31:39,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1316 states to 1316 states and 4524 transitions. [2021-04-15 03:31:39,128 INFO L78 Accepts]: Start accepts. Automaton has 1316 states and 4524 transitions. Word has length 24 [2021-04-15 03:31:39,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:31:39,128 INFO L480 AbstractCegarLoop]: Abstraction has 1316 states and 4524 transitions. [2021-04-15 03:31:39,128 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 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 03:31:39,128 INFO L276 IsEmpty]: Start isEmpty. Operand 1316 states and 4524 transitions. [2021-04-15 03:31:39,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 03:31:39,130 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:31:39,130 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] [2021-04-15 03:31:39,331 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-04-15 03:31:39,331 INFO L428 AbstractCegarLoop]: === Iteration 84 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 03:31:39,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:31:39,332 INFO L82 PathProgramCache]: Analyzing trace with hash -1186871304, now seen corresponding path program 49 times [2021-04-15 03:31:39,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:31:39,332 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713206367] [2021-04-15 03:31:39,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:31:39,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:31:39,647 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 03:31:39,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713206367] [2021-04-15 03:31:39,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378073264] [2021-04-15 03:31:39,648 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 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:31:39,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:31:39,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-04-15 03:31:39,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:31:39,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-04-15 03:31:39,897 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 03:31:39,899 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 03:31:39,900 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 03:31:39,900 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-04-15 03:31:39,937 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 03:31:39,938 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:31:39,938 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-04-15 03:31:39,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317147468] [2021-04-15 03:31:39,938 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 03:31:39,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:31:39,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 03:31:39,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-04-15 03:31:39,939 INFO L87 Difference]: Start difference. First operand 1316 states and 4524 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 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 03:31:42,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:31:42,367 INFO L93 Difference]: Finished difference Result 2754 states and 9152 transitions. [2021-04-15 03:31:42,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-04-15 03:31:42,368 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 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 24 [2021-04-15 03:31:42,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:31:42,374 INFO L225 Difference]: With dead ends: 2754 [2021-04-15 03:31:42,374 INFO L226 Difference]: Without dead ends: 2720 [2021-04-15 03:31:42,374 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 621 ImplicationChecksByTransitivity, 1792.6ms TimeCoverageRelationStatistics Valid=379, Invalid=2171, Unknown=0, NotChecked=0, Total=2550 [2021-04-15 03:31:42,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2720 states. [2021-04-15 03:31:42,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2720 to 1330. [2021-04-15 03:31:42,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1330 states, 1329 states have (on average 3.443190368698269) internal successors, (4576), 1329 states have internal predecessors, (4576), 0 states have call successors, (0), 0 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 03:31:42,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1330 states to 1330 states and 4576 transitions. [2021-04-15 03:31:42,416 INFO L78 Accepts]: Start accepts. Automaton has 1330 states and 4576 transitions. Word has length 24 [2021-04-15 03:31:42,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:31:42,416 INFO L480 AbstractCegarLoop]: Abstraction has 1330 states and 4576 transitions. [2021-04-15 03:31:42,416 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 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 03:31:42,416 INFO L276 IsEmpty]: Start isEmpty. Operand 1330 states and 4576 transitions. [2021-04-15 03:31:42,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 03:31:42,419 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:31:42,419 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] [2021-04-15 03:31:42,631 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-04-15 03:31:42,632 INFO L428 AbstractCegarLoop]: === Iteration 85 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 03:31:42,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:31:42,632 INFO L82 PathProgramCache]: Analyzing trace with hash 749372208, now seen corresponding path program 50 times [2021-04-15 03:31:42,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:31:42,632 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826161866] [2021-04-15 03:31:42,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:31:42,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:31:42,963 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 03:31:42,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826161866] [2021-04-15 03:31:42,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937753725] [2021-04-15 03:31:42,963 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 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:31:42,997 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 03:31:42,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:31:42,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 32 conjunts are in the unsatisfiable core [2021-04-15 03:31:42,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:31:43,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 03:31:43,281 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 03:31:43,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 44 [2021-04-15 03:31:43,293 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 03:31:43,340 INFO L628 ElimStorePlain]: treesize reduction 29, result has 50.8 percent of original size [2021-04-15 03:31:43,349 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 03:31:43,349 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:32 [2021-04-15 03:31:43,443 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 03:31:43,443 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:31:43,443 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-04-15 03:31:43,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569812862] [2021-04-15 03:31:43,444 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-04-15 03:31:43,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:31:43,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-04-15 03:31:43,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2021-04-15 03:31:43,444 INFO L87 Difference]: Start difference. First operand 1330 states and 4576 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 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 03:31:45,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:31:45,780 INFO L93 Difference]: Finished difference Result 2600 states and 8701 transitions. [2021-04-15 03:31:45,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-04-15 03:31:45,781 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 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 24 [2021-04-15 03:31:45,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:31:45,786 INFO L225 Difference]: With dead ends: 2600 [2021-04-15 03:31:45,787 INFO L226 Difference]: Without dead ends: 2578 [2021-04-15 03:31:45,787 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 748 ImplicationChecksByTransitivity, 1929.7ms TimeCoverageRelationStatistics Valid=457, Invalid=2299, Unknown=0, NotChecked=0, Total=2756 [2021-04-15 03:31:45,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2578 states. [2021-04-15 03:31:45,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2578 to 1330. [2021-04-15 03:31:45,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1330 states, 1329 states have (on average 3.44920993227991) internal successors, (4584), 1329 states have internal predecessors, (4584), 0 states have call successors, (0), 0 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 03:31:45,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1330 states to 1330 states and 4584 transitions. [2021-04-15 03:31:45,820 INFO L78 Accepts]: Start accepts. Automaton has 1330 states and 4584 transitions. Word has length 24 [2021-04-15 03:31:45,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:31:45,821 INFO L480 AbstractCegarLoop]: Abstraction has 1330 states and 4584 transitions. [2021-04-15 03:31:45,821 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 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 03:31:45,821 INFO L276 IsEmpty]: Start isEmpty. Operand 1330 states and 4584 transitions. [2021-04-15 03:31:45,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 03:31:45,824 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:31:45,824 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] [2021-04-15 03:31:46,024 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:31:46,025 INFO L428 AbstractCegarLoop]: === Iteration 86 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 03:31:46,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:31:46,025 INFO L82 PathProgramCache]: Analyzing trace with hash 572830776, now seen corresponding path program 51 times [2021-04-15 03:31:46,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:31:46,025 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610496189] [2021-04-15 03:31:46,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:31:46,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:31:46,280 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 03:31:46,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610496189] [2021-04-15 03:31:46,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953136260] [2021-04-15 03:31:46,281 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 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:31:46,307 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-15 03:31:46,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:31:46,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-04-15 03:31:46,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:31:46,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 03:31:46,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 03:31:46,523 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 03:31:46,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 25 treesize of output 53 [2021-04-15 03:31:46,526 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 03:31:46,555 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 03:31:46,557 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 03:31:46,557 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:50 [2021-04-15 03:31:46,800 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 03:31:46,800 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:31:46,800 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-04-15 03:31:46,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706030496] [2021-04-15 03:31:46,800 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-04-15 03:31:46,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:31:46,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-04-15 03:31:46,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2021-04-15 03:31:46,801 INFO L87 Difference]: Start difference. First operand 1330 states and 4584 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 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 03:31:49,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:31:49,354 INFO L93 Difference]: Finished difference Result 2457 states and 8209 transitions. [2021-04-15 03:31:49,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-04-15 03:31:49,354 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 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 24 [2021-04-15 03:31:49,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:31:49,360 INFO L225 Difference]: With dead ends: 2457 [2021-04-15 03:31:49,360 INFO L226 Difference]: Without dead ends: 2437 [2021-04-15 03:31:49,361 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 882 ImplicationChecksByTransitivity, 2166.5ms TimeCoverageRelationStatistics Valid=478, Invalid=2602, Unknown=0, NotChecked=0, Total=3080 [2021-04-15 03:31:49,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2437 states. [2021-04-15 03:31:49,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2437 to 1338. [2021-04-15 03:31:49,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1338 states, 1337 states have (on average 3.442782348541511) internal successors, (4603), 1337 states have internal predecessors, (4603), 0 states have call successors, (0), 0 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 03:31:49,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1338 states to 1338 states and 4603 transitions. [2021-04-15 03:31:49,391 INFO L78 Accepts]: Start accepts. Automaton has 1338 states and 4603 transitions. Word has length 24 [2021-04-15 03:31:49,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:31:49,392 INFO L480 AbstractCegarLoop]: Abstraction has 1338 states and 4603 transitions. [2021-04-15 03:31:49,392 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 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 03:31:49,392 INFO L276 IsEmpty]: Start isEmpty. Operand 1338 states and 4603 transitions. [2021-04-15 03:31:49,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 03:31:49,394 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:31:49,394 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] [2021-04-15 03:31:49,595 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2021-04-15 03:31:49,595 INFO L428 AbstractCegarLoop]: === Iteration 87 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 03:31:49,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:31:49,596 INFO L82 PathProgramCache]: Analyzing trace with hash -260907664, now seen corresponding path program 52 times [2021-04-15 03:31:49,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:31:49,596 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615863418] [2021-04-15 03:31:49,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:31:49,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:31:49,933 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 03:31:49,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615863418] [2021-04-15 03:31:49,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253249163] [2021-04-15 03:31:49,933 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 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:31:49,965 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 03:31:49,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:31:49,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-04-15 03:31:49,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:31:50,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-04-15 03:31:50,169 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 03:31:50,174 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 03:31:50,175 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 03:31:50,175 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-04-15 03:31:50,246 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 03:31:50,246 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:31:50,246 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-04-15 03:31:50,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041161777] [2021-04-15 03:31:50,247 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-04-15 03:31:50,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:31:50,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-04-15 03:31:50,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-04-15 03:31:50,247 INFO L87 Difference]: Start difference. First operand 1338 states and 4603 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:31:51,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:31:51,597 INFO L93 Difference]: Finished difference Result 2445 states and 8230 transitions. [2021-04-15 03:31:51,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-04-15 03:31:51,598 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-04-15 03:31:51,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:31:51,603 INFO L225 Difference]: With dead ends: 2445 [2021-04-15 03:31:51,603 INFO L226 Difference]: Without dead ends: 2434 [2021-04-15 03:31:51,603 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 1243.9ms TimeCoverageRelationStatistics Valid=271, Invalid=1451, Unknown=0, NotChecked=0, Total=1722 [2021-04-15 03:31:51,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2434 states. [2021-04-15 03:31:51,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2434 to 1337. [2021-04-15 03:31:51,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1337 states, 1336 states have (on average 3.447604790419162) internal successors, (4606), 1336 states have internal predecessors, (4606), 0 states have call successors, (0), 0 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 03:31:51,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1337 states to 1337 states and 4606 transitions. [2021-04-15 03:31:51,631 INFO L78 Accepts]: Start accepts. Automaton has 1337 states and 4606 transitions. Word has length 24 [2021-04-15 03:31:51,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:31:51,631 INFO L480 AbstractCegarLoop]: Abstraction has 1337 states and 4606 transitions. [2021-04-15 03:31:51,631 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:31:51,631 INFO L276 IsEmpty]: Start isEmpty. Operand 1337 states and 4606 transitions. [2021-04-15 03:31:51,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 03:31:51,634 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:31:51,634 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 03:31:51,834 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:31:51,835 INFO L428 AbstractCegarLoop]: === Iteration 88 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 03:31:51,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:31:51,835 INFO L82 PathProgramCache]: Analyzing trace with hash 1760921938, now seen corresponding path program 1 times [2021-04-15 03:31:51,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:31:51,835 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170083792] [2021-04-15 03:31:51,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:31:51,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:31:52,121 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 03:31:52,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170083792] [2021-04-15 03:31:52,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844695380] [2021-04-15 03:31:52,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:31:52,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:31:52,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-04-15 03:31:52,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:31:52,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-04-15 03:31:52,347 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 03:31:52,349 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 03:31:52,350 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 03:31:52,350 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-04-15 03:31:52,398 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 03:31:52,398 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:31:52,398 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-04-15 03:31:52,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734253010] [2021-04-15 03:31:52,399 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 03:31:52,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:31:52,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 03:31:52,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-04-15 03:31:52,400 INFO L87 Difference]: Start difference. First operand 1337 states and 4606 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 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 03:31:56,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:31:56,951 INFO L93 Difference]: Finished difference Result 3789 states and 12976 transitions. [2021-04-15 03:31:56,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-04-15 03:31:56,951 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 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 24 [2021-04-15 03:31:56,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:31:56,957 INFO L225 Difference]: With dead ends: 3789 [2021-04-15 03:31:56,957 INFO L226 Difference]: Without dead ends: 3770 [2021-04-15 03:31:56,957 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1512 ImplicationChecksByTransitivity, 3431.5ms TimeCoverageRelationStatistics Valid=761, Invalid=4351, Unknown=0, NotChecked=0, Total=5112 [2021-04-15 03:31:56,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3770 states. [2021-04-15 03:31:56,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3770 to 1372. [2021-04-15 03:31:56,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1372 states, 1371 states have (on average 3.4566010211524434) internal successors, (4739), 1371 states have internal predecessors, (4739), 0 states have call successors, (0), 0 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 03:31:56,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1372 states to 1372 states and 4739 transitions. [2021-04-15 03:31:56,995 INFO L78 Accepts]: Start accepts. Automaton has 1372 states and 4739 transitions. Word has length 24 [2021-04-15 03:31:56,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:31:56,995 INFO L480 AbstractCegarLoop]: Abstraction has 1372 states and 4739 transitions. [2021-04-15 03:31:56,995 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 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 03:31:56,995 INFO L276 IsEmpty]: Start isEmpty. Operand 1372 states and 4739 transitions. [2021-04-15 03:31:56,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 03:31:56,997 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:31:56,997 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 03:31:57,197 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-04-15 03:31:57,198 INFO L428 AbstractCegarLoop]: === Iteration 89 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 03:31:57,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:31:57,198 INFO L82 PathProgramCache]: Analyzing trace with hash 1251406074, now seen corresponding path program 2 times [2021-04-15 03:31:57,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:31:57,198 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069563327] [2021-04-15 03:31:57,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:31:57,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:31:57,472 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 03:31:57,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069563327] [2021-04-15 03:31:57,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830370933] [2021-04-15 03:31:57,473 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 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:31:57,501 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 03:31:57,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:31:57,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-04-15 03:31:57,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:31:57,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 03:31:57,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 03:31:57,856 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 20 treesize of output 12 [2021-04-15 03:31:57,858 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 03:31:57,863 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 03:31:57,865 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 03:31:57,865 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-04-15 03:31:57,906 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 03:31:57,907 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:31:57,907 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-04-15 03:31:57,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924411142] [2021-04-15 03:31:57,907 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-04-15 03:31:57,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:31:57,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-04-15 03:31:57,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2021-04-15 03:31:57,907 INFO L87 Difference]: Start difference. First operand 1372 states and 4739 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 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 03:32:00,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:32:00,301 INFO L93 Difference]: Finished difference Result 2341 states and 7957 transitions. [2021-04-15 03:32:00,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-04-15 03:32:00,302 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 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 24 [2021-04-15 03:32:00,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:32:00,307 INFO L225 Difference]: With dead ends: 2341 [2021-04-15 03:32:00,307 INFO L226 Difference]: Without dead ends: 2332 [2021-04-15 03:32:00,308 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 645 ImplicationChecksByTransitivity, 1876.0ms TimeCoverageRelationStatistics Valid=376, Invalid=2276, Unknown=0, NotChecked=0, Total=2652 [2021-04-15 03:32:00,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2332 states. [2021-04-15 03:32:00,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2332 to 1382. [2021-04-15 03:32:00,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1382 states, 1381 states have (on average 3.4576393917451123) internal successors, (4775), 1381 states have internal predecessors, (4775), 0 states have call successors, (0), 0 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 03:32:00,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1382 states to 1382 states and 4775 transitions. [2021-04-15 03:32:00,338 INFO L78 Accepts]: Start accepts. Automaton has 1382 states and 4775 transitions. Word has length 24 [2021-04-15 03:32:00,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:32:00,338 INFO L480 AbstractCegarLoop]: Abstraction has 1382 states and 4775 transitions. [2021-04-15 03:32:00,338 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 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 03:32:00,338 INFO L276 IsEmpty]: Start isEmpty. Operand 1382 states and 4775 transitions. [2021-04-15 03:32:00,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 03:32:00,341 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:32:00,341 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 03:32:00,541 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-04-15 03:32:00,542 INFO L428 AbstractCegarLoop]: === Iteration 90 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 03:32:00,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:32:00,542 INFO L82 PathProgramCache]: Analyzing trace with hash 1041868694, now seen corresponding path program 3 times [2021-04-15 03:32:00,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:32:00,542 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77287783] [2021-04-15 03:32:00,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:32:00,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:32:00,832 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 03:32:00,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77287783] [2021-04-15 03:32:00,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668331623] [2021-04-15 03:32:00,832 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 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:32:00,870 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 03:32:00,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:32:00,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-04-15 03:32:00,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:32:01,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-04-15 03:32:01,095 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 03:32:01,098 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 03:32:01,099 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 03:32:01,099 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-04-15 03:32:01,160 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 03:32:01,160 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:32:01,160 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-04-15 03:32:01,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047139830] [2021-04-15 03:32:01,161 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 03:32:01,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:32:01,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 03:32:01,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-04-15 03:32:01,161 INFO L87 Difference]: Start difference. First operand 1382 states and 4775 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 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 03:32:03,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:32:03,622 INFO L93 Difference]: Finished difference Result 2522 states and 8473 transitions. [2021-04-15 03:32:03,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-04-15 03:32:03,623 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 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 24 [2021-04-15 03:32:03,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:32:03,629 INFO L225 Difference]: With dead ends: 2522 [2021-04-15 03:32:03,629 INFO L226 Difference]: Without dead ends: 2493 [2021-04-15 03:32:03,629 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 566 ImplicationChecksByTransitivity, 1762.5ms TimeCoverageRelationStatistics Valid=348, Invalid=2004, Unknown=0, NotChecked=0, Total=2352 [2021-04-15 03:32:03,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2493 states. [2021-04-15 03:32:03,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2493 to 1392. [2021-04-15 03:32:03,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1392 states, 1391 states have (on average 3.460819554277498) internal successors, (4814), 1391 states have internal predecessors, (4814), 0 states have call successors, (0), 0 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 03:32:03,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1392 states to 1392 states and 4814 transitions. [2021-04-15 03:32:03,662 INFO L78 Accepts]: Start accepts. Automaton has 1392 states and 4814 transitions. Word has length 24 [2021-04-15 03:32:03,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:32:03,663 INFO L480 AbstractCegarLoop]: Abstraction has 1392 states and 4814 transitions. [2021-04-15 03:32:03,663 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 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 03:32:03,663 INFO L276 IsEmpty]: Start isEmpty. Operand 1392 states and 4814 transitions. [2021-04-15 03:32:03,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 03:32:03,669 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:32:03,669 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 03:32:03,889 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-04-15 03:32:03,889 INFO L428 AbstractCegarLoop]: === Iteration 91 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 03:32:03,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:32:03,889 INFO L82 PathProgramCache]: Analyzing trace with hash -1524426856, now seen corresponding path program 4 times [2021-04-15 03:32:03,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:32:03,889 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103752447] [2021-04-15 03:32:03,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:32:03,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:32:04,205 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 03:32:04,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103752447] [2021-04-15 03:32:04,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959779931] [2021-04-15 03:32:04,205 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 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:32:04,231 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 03:32:04,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:32:04,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-04-15 03:32:04,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:32:04,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-04-15 03:32:04,443 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 03:32:04,446 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 03:32:04,447 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 03:32:04,447 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-04-15 03:32:04,489 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 03:32:04,489 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:32:04,489 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-04-15 03:32:04,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889576923] [2021-04-15 03:32:04,490 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 03:32:04,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:32:04,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 03:32:04,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-04-15 03:32:04,490 INFO L87 Difference]: Start difference. First operand 1392 states and 4814 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 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 03:32:06,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:32:06,686 INFO L93 Difference]: Finished difference Result 2457 states and 8279 transitions. [2021-04-15 03:32:06,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-04-15 03:32:06,686 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 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 24 [2021-04-15 03:32:06,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:32:06,691 INFO L225 Difference]: With dead ends: 2457 [2021-04-15 03:32:06,691 INFO L226 Difference]: Without dead ends: 2428 [2021-04-15 03:32:06,691 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 549 ImplicationChecksByTransitivity, 1662.7ms TimeCoverageRelationStatistics Valid=348, Invalid=1908, Unknown=0, NotChecked=0, Total=2256 [2021-04-15 03:32:06,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2428 states. [2021-04-15 03:32:06,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2428 to 1386. [2021-04-15 03:32:06,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1386 states, 1385 states have (on average 3.4649819494584837) internal successors, (4799), 1385 states have internal predecessors, (4799), 0 states have call successors, (0), 0 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 03:32:06,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1386 states to 1386 states and 4799 transitions. [2021-04-15 03:32:06,718 INFO L78 Accepts]: Start accepts. Automaton has 1386 states and 4799 transitions. Word has length 24 [2021-04-15 03:32:06,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:32:06,718 INFO L480 AbstractCegarLoop]: Abstraction has 1386 states and 4799 transitions. [2021-04-15 03:32:06,718 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 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 03:32:06,718 INFO L276 IsEmpty]: Start isEmpty. Operand 1386 states and 4799 transitions. [2021-04-15 03:32:06,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 03:32:06,720 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:32:06,720 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 03:32:06,921 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:32:06,921 INFO L428 AbstractCegarLoop]: === Iteration 92 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 03:32:06,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:32:06,922 INFO L82 PathProgramCache]: Analyzing trace with hash 1742390580, now seen corresponding path program 5 times [2021-04-15 03:32:06,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:32:06,922 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365817496] [2021-04-15 03:32:06,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:32:06,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:32:07,233 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 03:32:07,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365817496] [2021-04-15 03:32:07,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952114795] [2021-04-15 03:32:07,234 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 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:32:07,274 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-04-15 03:32:07,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:32:07,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-04-15 03:32:07,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:32:07,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-04-15 03:32:07,472 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 03:32:07,476 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 03:32:07,477 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 03:32:07,477 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-04-15 03:32:07,543 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 03:32:07,543 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:32:07,543 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-04-15 03:32:07,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801834045] [2021-04-15 03:32:07,543 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-04-15 03:32:07,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:32:07,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-04-15 03:32:07,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-04-15 03:32:07,544 INFO L87 Difference]: Start difference. First operand 1386 states and 4799 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:32:08,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:32:08,880 INFO L93 Difference]: Finished difference Result 2282 states and 7774 transitions. [2021-04-15 03:32:08,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-04-15 03:32:08,881 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-04-15 03:32:08,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:32:08,886 INFO L225 Difference]: With dead ends: 2282 [2021-04-15 03:32:08,886 INFO L226 Difference]: Without dead ends: 2273 [2021-04-15 03:32:08,886 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 987.6ms TimeCoverageRelationStatistics Valid=210, Invalid=1050, Unknown=0, NotChecked=0, Total=1260 [2021-04-15 03:32:08,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2273 states. [2021-04-15 03:32:08,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2273 to 1399. [2021-04-15 03:32:08,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1399 states, 1398 states have (on average 3.46137339055794) internal successors, (4839), 1398 states have internal predecessors, (4839), 0 states have call successors, (0), 0 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 03:32:08,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1399 states to 1399 states and 4839 transitions. [2021-04-15 03:32:08,916 INFO L78 Accepts]: Start accepts. Automaton has 1399 states and 4839 transitions. Word has length 24 [2021-04-15 03:32:08,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:32:08,916 INFO L480 AbstractCegarLoop]: Abstraction has 1399 states and 4839 transitions. [2021-04-15 03:32:08,916 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:32:08,916 INFO L276 IsEmpty]: Start isEmpty. Operand 1399 states and 4839 transitions. [2021-04-15 03:32:08,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 03:32:08,919 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:32:08,919 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 03:32:09,119 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2021-04-15 03:32:09,120 INFO L428 AbstractCegarLoop]: === Iteration 93 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 03:32:09,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:32:09,120 INFO L82 PathProgramCache]: Analyzing trace with hash 2065976758, now seen corresponding path program 6 times [2021-04-15 03:32:09,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:32:09,120 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528688340] [2021-04-15 03:32:09,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:32:09,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:32:09,409 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 03:32:09,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528688340] [2021-04-15 03:32:09,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180251009] [2021-04-15 03:32:09,410 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 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:32:09,444 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-04-15 03:32:09,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:32:09,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 29 conjunts are in the unsatisfiable core [2021-04-15 03:32:09,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:32:09,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 03:32:09,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 03:32:09,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 03:32:09,759 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 03:32:09,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 43 [2021-04-15 03:32:09,762 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 03:32:09,787 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 03:32:09,803 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 03:32:09,804 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:88 [2021-04-15 03:32:09,987 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 03:32:09,987 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:32:09,988 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-04-15 03:32:09,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596846125] [2021-04-15 03:32:09,988 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-04-15 03:32:09,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:32:09,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-04-15 03:32:09,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2021-04-15 03:32:09,988 INFO L87 Difference]: Start difference. First operand 1399 states and 4839 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 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 03:32:12,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:32:12,831 INFO L93 Difference]: Finished difference Result 2270 states and 7714 transitions. [2021-04-15 03:32:12,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-04-15 03:32:12,831 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 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 24 [2021-04-15 03:32:12,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:32:12,837 INFO L225 Difference]: With dead ends: 2270 [2021-04-15 03:32:12,837 INFO L226 Difference]: Without dead ends: 2261 [2021-04-15 03:32:12,837 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 737 ImplicationChecksByTransitivity, 2622.3ms TimeCoverageRelationStatistics Valid=540, Invalid=2322, Unknown=0, NotChecked=0, Total=2862 [2021-04-15 03:32:12,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2261 states. [2021-04-15 03:32:12,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2261 to 1402. [2021-04-15 03:32:12,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1402 states, 1401 states have (on average 3.4632405424696646) internal successors, (4852), 1401 states have internal predecessors, (4852), 0 states have call successors, (0), 0 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 03:32:12,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1402 states to 1402 states and 4852 transitions. [2021-04-15 03:32:12,869 INFO L78 Accepts]: Start accepts. Automaton has 1402 states and 4852 transitions. Word has length 24 [2021-04-15 03:32:12,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:32:12,869 INFO L480 AbstractCegarLoop]: Abstraction has 1402 states and 4852 transitions. [2021-04-15 03:32:12,869 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 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 03:32:12,869 INFO L276 IsEmpty]: Start isEmpty. Operand 1402 states and 4852 transitions. [2021-04-15 03:32:12,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 03:32:12,872 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:32:12,872 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 03:32:13,073 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:32:13,073 INFO L428 AbstractCegarLoop]: === Iteration 94 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 03:32:13,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:32:13,073 INFO L82 PathProgramCache]: Analyzing trace with hash -543246416, now seen corresponding path program 7 times [2021-04-15 03:32:13,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:32:13,073 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445361470] [2021-04-15 03:32:13,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:32:13,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:32:13,365 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 03:32:13,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445361470] [2021-04-15 03:32:13,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046561516] [2021-04-15 03:32:13,366 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 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:32:13,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:32:13,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-04-15 03:32:13,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:32:13,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-04-15 03:32:13,626 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 03:32:13,630 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 03:32:13,632 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 03:32:13,632 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-04-15 03:32:13,707 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:32:13,708 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:32:13,708 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-04-15 03:32:13,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902982941] [2021-04-15 03:32:13,708 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-04-15 03:32:13,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:32:13,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-04-15 03:32:13,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-04-15 03:32:13,709 INFO L87 Difference]: Start difference. First operand 1402 states and 4852 transitions. Second operand has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 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 03:32:15,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:32:15,085 INFO L93 Difference]: Finished difference Result 2225 states and 7584 transitions. [2021-04-15 03:32:15,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-04-15 03:32:15,085 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 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 03:32:15,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:32:15,090 INFO L225 Difference]: With dead ends: 2225 [2021-04-15 03:32:15,091 INFO L226 Difference]: Without dead ends: 2214 [2021-04-15 03:32:15,091 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 1053.1ms TimeCoverageRelationStatistics Valid=178, Invalid=1012, Unknown=0, NotChecked=0, Total=1190 [2021-04-15 03:32:15,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2214 states. [2021-04-15 03:32:15,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2214 to 1394. [2021-04-15 03:32:15,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1394 states, 1393 states have (on average 3.464465183058148) internal successors, (4826), 1393 states have internal predecessors, (4826), 0 states have call successors, (0), 0 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 03:32:15,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1394 states to 1394 states and 4826 transitions. [2021-04-15 03:32:15,120 INFO L78 Accepts]: Start accepts. Automaton has 1394 states and 4826 transitions. Word has length 24 [2021-04-15 03:32:15,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:32:15,120 INFO L480 AbstractCegarLoop]: Abstraction has 1394 states and 4826 transitions. [2021-04-15 03:32:15,120 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 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 03:32:15,120 INFO L276 IsEmpty]: Start isEmpty. Operand 1394 states and 4826 transitions. [2021-04-15 03:32:15,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 03:32:15,123 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:32:15,123 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] [2021-04-15 03:32:15,323 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2021-04-15 03:32:15,323 INFO L428 AbstractCegarLoop]: === Iteration 95 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 03:32:15,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:32:15,324 INFO L82 PathProgramCache]: Analyzing trace with hash 1059751936, now seen corresponding path program 53 times [2021-04-15 03:32:15,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:32:15,324 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112237202] [2021-04-15 03:32:15,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:32:15,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:32:15,599 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 03:32:15,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112237202] [2021-04-15 03:32:15,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921628052] [2021-04-15 03:32:15,599 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:32:15,624 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-04-15 03:32:15,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:32:15,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-04-15 03:32:15,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:32:15,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-04-15 03:32:15,842 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 03:32:15,844 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 03:32:15,845 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 03:32:15,845 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-04-15 03:32:15,891 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 03:32:15,892 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:32:15,892 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-04-15 03:32:15,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613224725] [2021-04-15 03:32:15,892 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 03:32:15,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:32:15,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 03:32:15,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-04-15 03:32:15,893 INFO L87 Difference]: Start difference. First operand 1394 states and 4826 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 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 03:32:17,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:32:17,639 INFO L93 Difference]: Finished difference Result 2264 states and 7631 transitions. [2021-04-15 03:32:17,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-04-15 03:32:17,640 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 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 24 [2021-04-15 03:32:17,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:32:17,645 INFO L225 Difference]: With dead ends: 2264 [2021-04-15 03:32:17,645 INFO L226 Difference]: Without dead ends: 2254 [2021-04-15 03:32:17,645 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 1138.3ms TimeCoverageRelationStatistics Valid=245, Invalid=1647, Unknown=0, NotChecked=0, Total=1892 [2021-04-15 03:32:17,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2254 states. [2021-04-15 03:32:17,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2254 to 1396. [2021-04-15 03:32:17,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1396 states, 1395 states have (on average 3.4637992831541218) internal successors, (4832), 1395 states have internal predecessors, (4832), 0 states have call successors, (0), 0 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 03:32:17,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1396 states to 1396 states and 4832 transitions. [2021-04-15 03:32:17,685 INFO L78 Accepts]: Start accepts. Automaton has 1396 states and 4832 transitions. Word has length 24 [2021-04-15 03:32:17,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:32:17,686 INFO L480 AbstractCegarLoop]: Abstraction has 1396 states and 4832 transitions. [2021-04-15 03:32:17,686 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 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 03:32:17,686 INFO L276 IsEmpty]: Start isEmpty. Operand 1396 states and 4832 transitions. [2021-04-15 03:32:17,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 03:32:17,688 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:32:17,688 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] [2021-04-15 03:32:17,889 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-04-15 03:32:17,889 INFO L428 AbstractCegarLoop]: === Iteration 96 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 03:32:17,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:32:17,889 INFO L82 PathProgramCache]: Analyzing trace with hash -448330122, now seen corresponding path program 54 times [2021-04-15 03:32:17,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:32:17,889 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406467290] [2021-04-15 03:32:17,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:32:17,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:32:18,169 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 03:32:18,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406467290] [2021-04-15 03:32:18,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814382891] [2021-04-15 03:32:18,169 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:32:18,195 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-04-15 03:32:18,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:32:18,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-04-15 03:32:18,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:32:18,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 03:32:18,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 03:32:18,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 03:32:18,558 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 03:32:18,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 42 [2021-04-15 03:32:18,565 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-04-15 03:32:18,601 INFO L628 ElimStorePlain]: treesize reduction 27, result has 50.0 percent of original size [2021-04-15 03:32:18,605 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 03:32:18,606 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:21 [2021-04-15 03:32:18,704 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 03:32:18,705 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:32:18,705 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-04-15 03:32:18,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089938037] [2021-04-15 03:32:18,705 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-04-15 03:32:18,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:32:18,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-04-15 03:32:18,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2021-04-15 03:32:18,705 INFO L87 Difference]: Start difference. First operand 1396 states and 4832 transitions. Second operand has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 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 03:32:20,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:32:20,330 INFO L93 Difference]: Finished difference Result 2206 states and 7384 transitions. [2021-04-15 03:32:20,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-15 03:32:20,331 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 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 24 [2021-04-15 03:32:20,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:32:20,336 INFO L225 Difference]: With dead ends: 2206 [2021-04-15 03:32:20,336 INFO L226 Difference]: Without dead ends: 2174 [2021-04-15 03:32:20,336 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 1127.4ms TimeCoverageRelationStatistics Valid=167, Invalid=1165, Unknown=0, NotChecked=0, Total=1332 [2021-04-15 03:32:20,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2174 states. [2021-04-15 03:32:20,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2174 to 1408. [2021-04-15 03:32:20,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1408 states, 1407 states have (on average 3.4633972992181947) internal successors, (4873), 1407 states have internal predecessors, (4873), 0 states have call successors, (0), 0 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 03:32:20,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1408 states to 1408 states and 4873 transitions. [2021-04-15 03:32:20,364 INFO L78 Accepts]: Start accepts. Automaton has 1408 states and 4873 transitions. Word has length 24 [2021-04-15 03:32:20,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:32:20,364 INFO L480 AbstractCegarLoop]: Abstraction has 1408 states and 4873 transitions. [2021-04-15 03:32:20,364 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 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 03:32:20,364 INFO L276 IsEmpty]: Start isEmpty. Operand 1408 states and 4873 transitions. [2021-04-15 03:32:20,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 03:32:20,367 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:32:20,367 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] [2021-04-15 03:32:20,568 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-04-15 03:32:20,568 INFO L428 AbstractCegarLoop]: === Iteration 97 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 03:32:20,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:32:20,568 INFO L82 PathProgramCache]: Analyzing trace with hash 1487913390, now seen corresponding path program 55 times [2021-04-15 03:32:20,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:32:20,568 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340927747] [2021-04-15 03:32:20,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:32:20,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:32:20,855 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 03:32:20,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340927747] [2021-04-15 03:32:20,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174828567] [2021-04-15 03:32:20,856 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:32:20,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:32:20,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-04-15 03:32:20,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:32:21,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-04-15 03:32:21,095 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 03:32:21,098 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 03:32:21,098 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 03:32:21,099 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-04-15 03:32:21,141 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 03:32:21,141 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:32:21,141 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-04-15 03:32:21,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370592923] [2021-04-15 03:32:21,142 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 03:32:21,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:32:21,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 03:32:21,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-04-15 03:32:21,142 INFO L87 Difference]: Start difference. First operand 1408 states and 4873 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 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 03:32:22,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:32:22,882 INFO L93 Difference]: Finished difference Result 2197 states and 7402 transitions. [2021-04-15 03:32:22,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-04-15 03:32:22,882 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 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 24 [2021-04-15 03:32:22,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:32:22,887 INFO L225 Difference]: With dead ends: 2197 [2021-04-15 03:32:22,887 INFO L226 Difference]: Without dead ends: 2175 [2021-04-15 03:32:22,888 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 1134.0ms TimeCoverageRelationStatistics Valid=235, Invalid=1487, Unknown=0, NotChecked=0, Total=1722 [2021-04-15 03:32:22,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2175 states. [2021-04-15 03:32:22,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2175 to 1410. [2021-04-15 03:32:22,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1410 states, 1409 states have (on average 3.4669978708303764) internal successors, (4885), 1409 states have internal predecessors, (4885), 0 states have call successors, (0), 0 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 03:32:22,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1410 states to 1410 states and 4885 transitions. [2021-04-15 03:32:22,917 INFO L78 Accepts]: Start accepts. Automaton has 1410 states and 4885 transitions. Word has length 24 [2021-04-15 03:32:22,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:32:22,917 INFO L480 AbstractCegarLoop]: Abstraction has 1410 states and 4885 transitions. [2021-04-15 03:32:22,917 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 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 03:32:22,917 INFO L276 IsEmpty]: Start isEmpty. Operand 1410 states and 4885 transitions. [2021-04-15 03:32:22,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 03:32:22,920 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:32:22,920 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] [2021-04-15 03:32:23,123 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:32:23,123 INFO L428 AbstractCegarLoop]: === Iteration 98 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 03:32:23,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:32:23,124 INFO L82 PathProgramCache]: Analyzing trace with hash 1311371958, now seen corresponding path program 56 times [2021-04-15 03:32:23,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:32:23,124 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956398224] [2021-04-15 03:32:23,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:32:23,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:32:23,376 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 03:32:23,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956398224] [2021-04-15 03:32:23,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486053363] [2021-04-15 03:32:23,376 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:32:23,401 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 03:32:23,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:32:23,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-04-15 03:32:23,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:32:23,591 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 03:32:23,592 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-04-15 03:32:23,593 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 03:32:23,608 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 03:32:23,609 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 03:32:23,609 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-04-15 03:32:23,739 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 03:32:23,739 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:32:23,739 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-04-15 03:32:23,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141546612] [2021-04-15 03:32:23,739 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 03:32:23,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:32:23,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 03:32:23,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-04-15 03:32:23,740 INFO L87 Difference]: Start difference. First operand 1410 states and 4885 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 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 03:32:25,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:32:25,352 INFO L93 Difference]: Finished difference Result 2128 states and 7175 transitions. [2021-04-15 03:32:25,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-04-15 03:32:25,353 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 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 24 [2021-04-15 03:32:25,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:32:25,357 INFO L225 Difference]: With dead ends: 2128 [2021-04-15 03:32:25,358 INFO L226 Difference]: Without dead ends: 2118 [2021-04-15 03:32:25,358 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 490 ImplicationChecksByTransitivity, 1190.8ms TimeCoverageRelationStatistics Valid=251, Invalid=1555, Unknown=0, NotChecked=0, Total=1806 [2021-04-15 03:32:25,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2118 states. [2021-04-15 03:32:25,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2118 to 1416. [2021-04-15 03:32:25,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1416 states, 1415 states have (on average 3.462897526501767) internal successors, (4900), 1415 states have internal predecessors, (4900), 0 states have call successors, (0), 0 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 03:32:25,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1416 states to 1416 states and 4900 transitions. [2021-04-15 03:32:25,387 INFO L78 Accepts]: Start accepts. Automaton has 1416 states and 4900 transitions. Word has length 24 [2021-04-15 03:32:25,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:32:25,388 INFO L480 AbstractCegarLoop]: Abstraction has 1416 states and 4900 transitions. [2021-04-15 03:32:25,388 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 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 03:32:25,388 INFO L276 IsEmpty]: Start isEmpty. Operand 1416 states and 4900 transitions. [2021-04-15 03:32:25,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 03:32:25,391 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:32:25,391 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] [2021-04-15 03:32:25,592 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:32:25,593 INFO L428 AbstractCegarLoop]: === Iteration 99 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 03:32:25,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:32:25,593 INFO L82 PathProgramCache]: Analyzing trace with hash 477633518, now seen corresponding path program 57 times [2021-04-15 03:32:25,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:32:25,593 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488748953] [2021-04-15 03:32:25,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:32:25,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:32:25,850 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 03:32:25,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488748953] [2021-04-15 03:32:25,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793192281] [2021-04-15 03:32:25,850 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:32:25,876 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-15 03:32:25,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:32:25,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 32 conjunts are in the unsatisfiable core [2021-04-15 03:32:25,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:32:26,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 03:32:26,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 03:32:26,091 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 03:32:26,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 23 treesize of output 49 [2021-04-15 03:32:26,094 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 03:32:26,119 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 03:32:26,166 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 03:32:26,166 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:188 [2021-04-15 03:32:26,331 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 29 [2021-04-15 03:32:26,532 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 03:32:26,532 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:32:26,532 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-04-15 03:32:26,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990154214] [2021-04-15 03:32:26,533 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 03:32:26,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:32:26,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 03:32:26,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-04-15 03:32:26,533 INFO L87 Difference]: Start difference. First operand 1416 states and 4900 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 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 03:32:28,131 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 34 [2021-04-15 03:32:28,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:32:28,538 INFO L93 Difference]: Finished difference Result 2092 states and 7054 transitions. [2021-04-15 03:32:28,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-04-15 03:32:28,539 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 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 24 [2021-04-15 03:32:28,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:32:28,543 INFO L225 Difference]: With dead ends: 2092 [2021-04-15 03:32:28,544 INFO L226 Difference]: Without dead ends: 2080 [2021-04-15 03:32:28,544 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 1540.4ms TimeCoverageRelationStatistics Valid=199, Invalid=1441, Unknown=0, NotChecked=0, Total=1640 [2021-04-15 03:32:28,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2080 states. [2021-04-15 03:32:28,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2080 to 1414. [2021-04-15 03:32:28,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1414 states, 1413 states have (on average 3.4685067232837934) internal successors, (4901), 1413 states have internal predecessors, (4901), 0 states have call successors, (0), 0 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 03:32:28,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1414 states to 1414 states and 4901 transitions. [2021-04-15 03:32:28,586 INFO L78 Accepts]: Start accepts. Automaton has 1414 states and 4901 transitions. Word has length 24 [2021-04-15 03:32:28,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:32:28,586 INFO L480 AbstractCegarLoop]: Abstraction has 1414 states and 4901 transitions. [2021-04-15 03:32:28,586 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 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 03:32:28,586 INFO L276 IsEmpty]: Start isEmpty. Operand 1414 states and 4901 transitions. [2021-04-15 03:32:28,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 03:32:28,590 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:32:28,590 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 03:32:28,817 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:32:28,817 INFO L428 AbstractCegarLoop]: === Iteration 100 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 03:32:28,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:32:28,817 INFO L82 PathProgramCache]: Analyzing trace with hash -291281526, now seen corresponding path program 8 times [2021-04-15 03:32:28,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:32:28,817 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922029646] [2021-04-15 03:32:28,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:32:28,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:32:29,037 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 03:32:29,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922029646] [2021-04-15 03:32:29,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696623387] [2021-04-15 03:32:29,038 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:32:29,075 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 03:32:29,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:32:29,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-04-15 03:32:29,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:32:29,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 03:32:29,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 03:32:29,431 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 20 treesize of output 12 [2021-04-15 03:32:29,433 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 03:32:29,439 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 03:32:29,440 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 03:32:29,440 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-04-15 03:32:29,510 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 03:32:29,510 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:32:29,510 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-04-15 03:32:29,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040585798] [2021-04-15 03:32:29,510 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-04-15 03:32:29,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:32:29,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-04-15 03:32:29,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-04-15 03:32:29,511 INFO L87 Difference]: Start difference. First operand 1414 states and 4901 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 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 03:32:31,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:32:31,188 INFO L93 Difference]: Finished difference Result 2163 states and 7289 transitions. [2021-04-15 03:32:31,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-04-15 03:32:31,189 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 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 24 [2021-04-15 03:32:31,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:32:31,193 INFO L225 Difference]: With dead ends: 2163 [2021-04-15 03:32:31,194 INFO L226 Difference]: Without dead ends: 2154 [2021-04-15 03:32:31,194 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 1071.1ms TimeCoverageRelationStatistics Valid=206, Invalid=1434, Unknown=0, NotChecked=0, Total=1640 [2021-04-15 03:32:31,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2154 states. [2021-04-15 03:32:31,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2154 to 1414. [2021-04-15 03:32:31,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1414 states, 1413 states have (on average 3.4685067232837934) internal successors, (4901), 1413 states have internal predecessors, (4901), 0 states have call successors, (0), 0 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 03:32:31,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1414 states to 1414 states and 4901 transitions. [2021-04-15 03:32:31,222 INFO L78 Accepts]: Start accepts. Automaton has 1414 states and 4901 transitions. Word has length 24 [2021-04-15 03:32:31,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:32:31,222 INFO L480 AbstractCegarLoop]: Abstraction has 1414 states and 4901 transitions. [2021-04-15 03:32:31,222 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 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 03:32:31,222 INFO L276 IsEmpty]: Start isEmpty. Operand 1414 states and 4901 transitions. [2021-04-15 03:32:31,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 03:32:31,225 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:32:31,225 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 03:32:31,425 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:32:31,426 INFO L428 AbstractCegarLoop]: === Iteration 101 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 03:32:31,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:32:31,426 INFO L82 PathProgramCache]: Analyzing trace with hash -500818906, now seen corresponding path program 9 times [2021-04-15 03:32:31,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:32:31,426 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427018998] [2021-04-15 03:32:31,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:32:31,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:32:31,735 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 03:32:31,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427018998] [2021-04-15 03:32:31,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649631657] [2021-04-15 03:32:31,735 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:32:31,759 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 03:32:31,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:32:31,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-04-15 03:32:31,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:32:31,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-04-15 03:32:31,984 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 03:32:31,987 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 03:32:31,988 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 03:32:31,988 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-04-15 03:32:32,032 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 03:32:32,032 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:32:32,032 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-04-15 03:32:32,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904035582] [2021-04-15 03:32:32,033 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 03:32:32,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:32:32,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 03:32:32,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-04-15 03:32:32,033 INFO L87 Difference]: Start difference. First operand 1414 states and 4901 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 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 03:32:33,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:32:33,991 INFO L93 Difference]: Finished difference Result 2207 states and 7434 transitions. [2021-04-15 03:32:33,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-04-15 03:32:33,992 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 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 24 [2021-04-15 03:32:33,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:32:33,996 INFO L225 Difference]: With dead ends: 2207 [2021-04-15 03:32:33,996 INFO L226 Difference]: Without dead ends: 2188 [2021-04-15 03:32:33,997 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 1306.2ms TimeCoverageRelationStatistics Valid=241, Invalid=1565, Unknown=0, NotChecked=0, Total=1806 [2021-04-15 03:32:33,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2188 states. [2021-04-15 03:32:34,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2188 to 1423. [2021-04-15 03:32:34,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1423 states, 1422 states have (on average 3.469760900140647) internal successors, (4934), 1422 states have internal predecessors, (4934), 0 states have call successors, (0), 0 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 03:32:34,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1423 states to 1423 states and 4934 transitions. [2021-04-15 03:32:34,023 INFO L78 Accepts]: Start accepts. Automaton has 1423 states and 4934 transitions. Word has length 24 [2021-04-15 03:32:34,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:32:34,023 INFO L480 AbstractCegarLoop]: Abstraction has 1423 states and 4934 transitions. [2021-04-15 03:32:34,024 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 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 03:32:34,024 INFO L276 IsEmpty]: Start isEmpty. Operand 1423 states and 4934 transitions. [2021-04-15 03:32:34,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 03:32:34,026 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:32:34,026 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 03:32:34,226 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:32:34,226 INFO L428 AbstractCegarLoop]: === Iteration 102 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 03:32:34,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:32:34,227 INFO L82 PathProgramCache]: Analyzing trace with hash 1227852840, now seen corresponding path program 10 times [2021-04-15 03:32:34,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:32:34,227 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702257528] [2021-04-15 03:32:34,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:32:34,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:32:34,491 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 03:32:34,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702257528] [2021-04-15 03:32:34,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176765913] [2021-04-15 03:32:34,492 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 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:32:34,518 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 03:32:34,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:32:34,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-04-15 03:32:34,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:32:34,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-04-15 03:32:34,734 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 03:32:34,736 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 03:32:34,737 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 03:32:34,737 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-04-15 03:32:34,779 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 03:32:34,779 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:32:34,779 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-04-15 03:32:34,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844892680] [2021-04-15 03:32:34,780 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 03:32:34,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:32:34,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 03:32:34,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-04-15 03:32:34,780 INFO L87 Difference]: Start difference. First operand 1423 states and 4934 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 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 03:32:36,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:32:36,693 INFO L93 Difference]: Finished difference Result 2159 states and 7292 transitions. [2021-04-15 03:32:36,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-04-15 03:32:36,694 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 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 24 [2021-04-15 03:32:36,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:32:36,698 INFO L225 Difference]: With dead ends: 2159 [2021-04-15 03:32:36,698 INFO L226 Difference]: Without dead ends: 2140 [2021-04-15 03:32:36,698 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 1213.8ms TimeCoverageRelationStatistics Valid=235, Invalid=1487, Unknown=0, NotChecked=0, Total=1722 [2021-04-15 03:32:36,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2140 states. [2021-04-15 03:32:36,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2140 to 1421. [2021-04-15 03:32:36,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1421 states, 1420 states have (on average 3.472535211267606) internal successors, (4931), 1420 states have internal predecessors, (4931), 0 states have call successors, (0), 0 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 03:32:36,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1421 states to 1421 states and 4931 transitions. [2021-04-15 03:32:36,724 INFO L78 Accepts]: Start accepts. Automaton has 1421 states and 4931 transitions. Word has length 24 [2021-04-15 03:32:36,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:32:36,724 INFO L480 AbstractCegarLoop]: Abstraction has 1421 states and 4931 transitions. [2021-04-15 03:32:36,724 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 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 03:32:36,724 INFO L276 IsEmpty]: Start isEmpty. Operand 1421 states and 4931 transitions. [2021-04-15 03:32:36,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 03:32:36,726 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:32:36,726 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 03:32:36,927 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:32:36,927 INFO L428 AbstractCegarLoop]: === Iteration 103 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 03:32:36,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:32:36,927 INFO L82 PathProgramCache]: Analyzing trace with hash 199702980, now seen corresponding path program 11 times [2021-04-15 03:32:36,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:32:36,927 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125975383] [2021-04-15 03:32:36,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:32:36,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:32:37,220 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 03:32:37,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125975383] [2021-04-15 03:32:37,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498417152] [2021-04-15 03:32:37,220 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 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:32:37,244 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-04-15 03:32:37,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:32:37,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-04-15 03:32:37,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:32:37,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-04-15 03:32:37,442 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 03:32:37,446 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 03:32:37,447 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 03:32:37,447 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-04-15 03:32:37,516 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 03:32:37,516 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:32:37,516 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-04-15 03:32:37,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943207461] [2021-04-15 03:32:37,516 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-04-15 03:32:37,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:32:37,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-04-15 03:32:37,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-04-15 03:32:37,517 INFO L87 Difference]: Start difference. First operand 1421 states and 4931 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:32:38,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:32:38,930 INFO L93 Difference]: Finished difference Result 2129 states and 7210 transitions. [2021-04-15 03:32:38,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-04-15 03:32:38,930 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-04-15 03:32:38,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:32:38,934 INFO L225 Difference]: With dead ends: 2129 [2021-04-15 03:32:38,934 INFO L226 Difference]: Without dead ends: 2120 [2021-04-15 03:32:38,935 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 966.9ms TimeCoverageRelationStatistics Valid=199, Invalid=1133, Unknown=0, NotChecked=0, Total=1332 [2021-04-15 03:32:38,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2120 states. [2021-04-15 03:32:38,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2120 to 1430. [2021-04-15 03:32:38,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1430 states, 1429 states have (on average 3.470258922323303) internal successors, (4959), 1429 states have internal predecessors, (4959), 0 states have call successors, (0), 0 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 03:32:38,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1430 states to 1430 states and 4959 transitions. [2021-04-15 03:32:38,971 INFO L78 Accepts]: Start accepts. Automaton has 1430 states and 4959 transitions. Word has length 24 [2021-04-15 03:32:38,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:32:38,972 INFO L480 AbstractCegarLoop]: Abstraction has 1430 states and 4959 transitions. [2021-04-15 03:32:38,972 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:32:38,972 INFO L276 IsEmpty]: Start isEmpty. Operand 1430 states and 4959 transitions. [2021-04-15 03:32:38,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 03:32:38,975 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:32:38,975 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 03:32:39,188 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2021-04-15 03:32:39,189 INFO L428 AbstractCegarLoop]: === Iteration 104 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 03:32:39,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:32:39,189 INFO L82 PathProgramCache]: Analyzing trace with hash 523289158, now seen corresponding path program 12 times [2021-04-15 03:32:39,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:32:39,189 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754842337] [2021-04-15 03:32:39,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:32:39,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:32:39,444 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 03:32:39,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754842337] [2021-04-15 03:32:39,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991383193] [2021-04-15 03:32:39,444 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:32:39,472 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-04-15 03:32:39,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:32:39,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 29 conjunts are in the unsatisfiable core [2021-04-15 03:32:39,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:32:39,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 03:32:39,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 03:32:39,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 03:32:39,737 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 03:32:39,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 43 [2021-04-15 03:32:39,739 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 03:32:39,756 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 03:32:39,770 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 03:32:39,771 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:88 [2021-04-15 03:32:39,914 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 03:32:39,915 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:32:39,915 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-04-15 03:32:39,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238333763] [2021-04-15 03:32:39,915 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-04-15 03:32:39,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:32:39,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-04-15 03:32:39,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2021-04-15 03:32:39,916 INFO L87 Difference]: Start difference. First operand 1430 states and 4959 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 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 03:32:41,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:32:41,722 INFO L93 Difference]: Finished difference Result 2106 states and 7121 transitions. [2021-04-15 03:32:41,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-04-15 03:32:41,723 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 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 24 [2021-04-15 03:32:41,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:32:41,727 INFO L225 Difference]: With dead ends: 2106 [2021-04-15 03:32:41,727 INFO L226 Difference]: Without dead ends: 2097 [2021-04-15 03:32:41,728 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 1402.0ms TimeCoverageRelationStatistics Valid=284, Invalid=1522, Unknown=0, NotChecked=0, Total=1806 [2021-04-15 03:32:41,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2097 states. [2021-04-15 03:32:41,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2097 to 1444. [2021-04-15 03:32:41,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1444 states, 1443 states have (on average 3.469161469161469) internal successors, (5006), 1443 states have internal predecessors, (5006), 0 states have call successors, (0), 0 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 03:32:41,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1444 states to 1444 states and 5006 transitions. [2021-04-15 03:32:41,754 INFO L78 Accepts]: Start accepts. Automaton has 1444 states and 5006 transitions. Word has length 24 [2021-04-15 03:32:41,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:32:41,754 INFO L480 AbstractCegarLoop]: Abstraction has 1444 states and 5006 transitions. [2021-04-15 03:32:41,754 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 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 03:32:41,754 INFO L276 IsEmpty]: Start isEmpty. Operand 1444 states and 5006 transitions. [2021-04-15 03:32:41,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 03:32:41,756 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:32:41,756 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 03:32:41,956 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2021-04-15 03:32:41,957 INFO L428 AbstractCegarLoop]: === Iteration 105 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 03:32:41,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:32:41,957 INFO L82 PathProgramCache]: Analyzing trace with hash -2085934016, now seen corresponding path program 13 times [2021-04-15 03:32:41,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:32:41,957 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805211279] [2021-04-15 03:32:41,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:32:41,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:32:42,188 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 03:32:42,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805211279] [2021-04-15 03:32:42,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854901246] [2021-04-15 03:32:42,189 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 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:32:42,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:32:42,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-04-15 03:32:42,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:32:42,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-04-15 03:32:42,411 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 03:32:42,416 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 03:32:42,417 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 03:32:42,417 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-04-15 03:32:42,482 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 03:32:42,483 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:32:42,483 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-04-15 03:32:42,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395787577] [2021-04-15 03:32:42,483 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-04-15 03:32:42,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:32:42,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-04-15 03:32:42,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-04-15 03:32:42,483 INFO L87 Difference]: Start difference. First operand 1444 states and 5006 transitions. Second operand has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 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 03:32:43,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:32:43,804 INFO L93 Difference]: Finished difference Result 2058 states and 6984 transitions. [2021-04-15 03:32:43,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-15 03:32:43,805 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 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 03:32:43,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:32:43,809 INFO L225 Difference]: With dead ends: 2058 [2021-04-15 03:32:43,810 INFO L226 Difference]: Without dead ends: 2047 [2021-04-15 03:32:43,810 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 867.5ms TimeCoverageRelationStatistics Valid=149, Invalid=907, Unknown=0, NotChecked=0, Total=1056 [2021-04-15 03:32:43,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2047 states. [2021-04-15 03:32:43,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2047 to 1436. [2021-04-15 03:32:43,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1436 states, 1435 states have (on average 3.4717770034843207) internal successors, (4982), 1435 states have internal predecessors, (4982), 0 states have call successors, (0), 0 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 03:32:43,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1436 states to 1436 states and 4982 transitions. [2021-04-15 03:32:43,838 INFO L78 Accepts]: Start accepts. Automaton has 1436 states and 4982 transitions. Word has length 24 [2021-04-15 03:32:43,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:32:43,838 INFO L480 AbstractCegarLoop]: Abstraction has 1436 states and 4982 transitions. [2021-04-15 03:32:43,838 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 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 03:32:43,838 INFO L276 IsEmpty]: Start isEmpty. Operand 1436 states and 4982 transitions. [2021-04-15 03:32:43,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 03:32:43,840 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:32:43,841 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] [2021-04-15 03:32:44,041 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,94 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:32:44,041 INFO L428 AbstractCegarLoop]: === Iteration 106 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 03:32:44,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:32:44,041 INFO L82 PathProgramCache]: Analyzing trace with hash 721304348, now seen corresponding path program 58 times [2021-04-15 03:32:44,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:32:44,042 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827466919] [2021-04-15 03:32:44,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:32:44,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:32:44,405 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 03:32:44,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827466919] [2021-04-15 03:32:44,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140294305] [2021-04-15 03:32:44,406 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:32:44,441 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 03:32:44,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:32:44,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-04-15 03:32:44,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:32:44,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-04-15 03:32:44,706 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 03:32:44,709 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 03:32:44,710 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 03:32:44,710 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-04-15 03:32:44,758 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 03:32:44,759 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:32:44,759 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-04-15 03:32:44,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249979845] [2021-04-15 03:32:44,759 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 03:32:44,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:32:44,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 03:32:44,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-04-15 03:32:44,759 INFO L87 Difference]: Start difference. First operand 1436 states and 4982 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 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 03:32:45,219 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2021-04-15 03:32:47,376 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2021-04-15 03:32:47,768 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 43 [2021-04-15 03:32:48,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:32:48,070 INFO L93 Difference]: Finished difference Result 2323 states and 7747 transitions. [2021-04-15 03:32:48,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-04-15 03:32:48,071 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 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 24 [2021-04-15 03:32:48,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:32:48,076 INFO L225 Difference]: With dead ends: 2323 [2021-04-15 03:32:48,076 INFO L226 Difference]: Without dead ends: 2281 [2021-04-15 03:32:48,076 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 806 ImplicationChecksByTransitivity, 2468.3ms TimeCoverageRelationStatistics Valid=405, Invalid=2675, Unknown=0, NotChecked=0, Total=3080 [2021-04-15 03:32:48,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2281 states. [2021-04-15 03:32:48,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2281 to 1453. [2021-04-15 03:32:48,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1453 states, 1452 states have (on average 3.4648760330578514) internal successors, (5031), 1452 states have internal predecessors, (5031), 0 states have call successors, (0), 0 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 03:32:48,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1453 states to 1453 states and 5031 transitions. [2021-04-15 03:32:48,104 INFO L78 Accepts]: Start accepts. Automaton has 1453 states and 5031 transitions. Word has length 24 [2021-04-15 03:32:48,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:32:48,104 INFO L480 AbstractCegarLoop]: Abstraction has 1453 states and 5031 transitions. [2021-04-15 03:32:48,104 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 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 03:32:48,104 INFO L276 IsEmpty]: Start isEmpty. Operand 1453 states and 5031 transitions. [2021-04-15 03:32:48,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 03:32:48,107 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:32:48,107 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] [2021-04-15 03:32:48,307 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:32:48,307 INFO L428 AbstractCegarLoop]: === Iteration 107 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 03:32:48,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:32:48,307 INFO L82 PathProgramCache]: Analyzing trace with hash 1985601830, now seen corresponding path program 59 times [2021-04-15 03:32:48,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:32:48,308 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161067441] [2021-04-15 03:32:48,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:32:48,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:32:48,658 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 03:32:48,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161067441] [2021-04-15 03:32:48,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799967875] [2021-04-15 03:32:48,658 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:32:48,689 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-04-15 03:32:48,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:32:48,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-04-15 03:32:48,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:32:49,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 03:32:49,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 03:32:49,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 03:32:49,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 03:32:49,083 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 22 treesize of output 12 [2021-04-15 03:32:49,085 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 03:32:49,094 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 03:32:49,096 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 03:32:49,096 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:5 [2021-04-15 03:32:49,166 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 03:32:49,166 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:32:49,166 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-04-15 03:32:49,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791712070] [2021-04-15 03:32:49,166 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-04-15 03:32:49,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:32:49,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-04-15 03:32:49,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=492, Unknown=0, NotChecked=0, Total=552 [2021-04-15 03:32:49,167 INFO L87 Difference]: Start difference. First operand 1453 states and 5031 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 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 03:32:50,122 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 40 [2021-04-15 03:32:52,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:32:52,690 INFO L93 Difference]: Finished difference Result 2240 states and 7477 transitions. [2021-04-15 03:32:52,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-04-15 03:32:52,691 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 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 24 [2021-04-15 03:32:52,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:32:52,695 INFO L225 Difference]: With dead ends: 2240 [2021-04-15 03:32:52,696 INFO L226 Difference]: Without dead ends: 2186 [2021-04-15 03:32:52,696 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 737 ImplicationChecksByTransitivity, 2724.0ms TimeCoverageRelationStatistics Valid=374, Invalid=2932, Unknown=0, NotChecked=0, Total=3306 [2021-04-15 03:32:52,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2186 states. [2021-04-15 03:32:52,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2186 to 1458. [2021-04-15 03:32:52,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1458 states, 1457 states have (on average 3.465339739190117) internal successors, (5049), 1457 states have internal predecessors, (5049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:32:52,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1458 states to 1458 states and 5049 transitions. [2021-04-15 03:32:52,723 INFO L78 Accepts]: Start accepts. Automaton has 1458 states and 5049 transitions. Word has length 24 [2021-04-15 03:32:52,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:32:52,723 INFO L480 AbstractCegarLoop]: Abstraction has 1458 states and 5049 transitions. [2021-04-15 03:32:52,723 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 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 03:32:52,723 INFO L276 IsEmpty]: Start isEmpty. Operand 1458 states and 5049 transitions. [2021-04-15 03:32:52,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 03:32:52,725 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:32:52,725 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] [2021-04-15 03:32:52,926 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:32:52,926 INFO L428 AbstractCegarLoop]: === Iteration 108 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 03:32:52,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:32:52,926 INFO L82 PathProgramCache]: Analyzing trace with hash 1809060398, now seen corresponding path program 60 times [2021-04-15 03:32:52,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:32:52,926 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436326513] [2021-04-15 03:32:52,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:32:52,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:32:53,277 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 03:32:53,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436326513] [2021-04-15 03:32:53,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114535400] [2021-04-15 03:32:53,278 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:32:53,316 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 03:32:53,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:32:53,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-04-15 03:32:53,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:32:53,553 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 03:32:53,553 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-04-15 03:32:53,555 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 03:32:53,570 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 03:32:53,571 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 03:32:53,572 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-04-15 03:32:53,741 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 03:32:53,742 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:32:53,742 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-04-15 03:32:53,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970367668] [2021-04-15 03:32:53,742 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 03:32:53,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:32:53,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 03:32:53,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-04-15 03:32:53,743 INFO L87 Difference]: Start difference. First operand 1458 states and 5049 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 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 03:32:56,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:32:56,454 INFO L93 Difference]: Finished difference Result 2181 states and 7340 transitions. [2021-04-15 03:32:56,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-04-15 03:32:56,455 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 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 24 [2021-04-15 03:32:56,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:32:56,459 INFO L225 Difference]: With dead ends: 2181 [2021-04-15 03:32:56,459 INFO L226 Difference]: Without dead ends: 2141 [2021-04-15 03:32:56,459 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 813 ImplicationChecksByTransitivity, 2176.7ms TimeCoverageRelationStatistics Valid=395, Invalid=2467, Unknown=0, NotChecked=0, Total=2862 [2021-04-15 03:32:56,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2141 states. [2021-04-15 03:32:56,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2141 to 1469. [2021-04-15 03:32:56,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1469 states, 1468 states have (on average 3.462534059945504) internal successors, (5083), 1468 states have internal predecessors, (5083), 0 states have call successors, (0), 0 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 03:32:56,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1469 states to 1469 states and 5083 transitions. [2021-04-15 03:32:56,485 INFO L78 Accepts]: Start accepts. Automaton has 1469 states and 5083 transitions. Word has length 24 [2021-04-15 03:32:56,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:32:56,485 INFO L480 AbstractCegarLoop]: Abstraction has 1469 states and 5083 transitions. [2021-04-15 03:32:56,485 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 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 03:32:56,485 INFO L276 IsEmpty]: Start isEmpty. Operand 1469 states and 5083 transitions. [2021-04-15 03:32:56,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 03:32:56,487 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:32:56,487 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] [2021-04-15 03:32:56,688 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable187 [2021-04-15 03:32:56,688 INFO L428 AbstractCegarLoop]: === Iteration 109 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 03:32:56,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:32:56,688 INFO L82 PathProgramCache]: Analyzing trace with hash 975321958, now seen corresponding path program 61 times [2021-04-15 03:32:56,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:32:56,688 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104903922] [2021-04-15 03:32:56,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:32:56,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:32:57,080 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 03:32:57,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104903922] [2021-04-15 03:32:57,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538618952] [2021-04-15 03:32:57,080 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:32:57,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:32:57,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-04-15 03:32:57,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:32:57,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-04-15 03:32:57,376 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 03:32:57,382 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 03:32:57,383 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 03:32:57,383 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-04-15 03:32:57,483 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 03:32:57,484 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:32:57,484 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-04-15 03:32:57,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960574402] [2021-04-15 03:32:57,484 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-04-15 03:32:57,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:32:57,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-04-15 03:32:57,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-04-15 03:32:57,485 INFO L87 Difference]: Start difference. First operand 1469 states and 5083 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:32:59,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:32:59,460 INFO L93 Difference]: Finished difference Result 2093 states and 7080 transitions. [2021-04-15 03:32:59,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-04-15 03:32:59,461 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-04-15 03:32:59,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:32:59,465 INFO L225 Difference]: With dead ends: 2093 [2021-04-15 03:32:59,465 INFO L226 Difference]: Without dead ends: 2067 [2021-04-15 03:32:59,466 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 1569.7ms TimeCoverageRelationStatistics Valid=238, Invalid=1402, Unknown=0, NotChecked=0, Total=1640 [2021-04-15 03:32:59,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2067 states. [2021-04-15 03:32:59,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2067 to 1471. [2021-04-15 03:32:59,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1471 states, 1470 states have (on average 3.4605442176870747) internal successors, (5087), 1470 states have internal predecessors, (5087), 0 states have call successors, (0), 0 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 03:32:59,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1471 states to 1471 states and 5087 transitions. [2021-04-15 03:32:59,491 INFO L78 Accepts]: Start accepts. Automaton has 1471 states and 5087 transitions. Word has length 24 [2021-04-15 03:32:59,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:32:59,491 INFO L480 AbstractCegarLoop]: Abstraction has 1471 states and 5087 transitions. [2021-04-15 03:32:59,491 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:32:59,491 INFO L276 IsEmpty]: Start isEmpty. Operand 1471 states and 5087 transitions. [2021-04-15 03:32:59,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 03:32:59,493 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:32:59,493 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 03:32:59,694 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2021-04-15 03:32:59,694 INFO L428 AbstractCegarLoop]: === Iteration 110 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 03:32:59,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:32:59,694 INFO L82 PathProgramCache]: Analyzing trace with hash -846298030, now seen corresponding path program 14 times [2021-04-15 03:32:59,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:32:59,694 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801188798] [2021-04-15 03:32:59,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:32:59,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:33:00,134 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 03:33:00,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801188798] [2021-04-15 03:33:00,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128221235] [2021-04-15 03:33:00,134 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:33:00,165 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 03:33:00,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:33:00,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-04-15 03:33:00,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:33:00,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 03:33:00,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 03:33:00,654 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 20 treesize of output 12 [2021-04-15 03:33:00,656 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 03:33:00,663 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 03:33:00,665 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 03:33:00,666 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-04-15 03:33:00,723 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 03:33:00,723 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:33:00,724 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-04-15 03:33:00,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144896220] [2021-04-15 03:33:00,724 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-04-15 03:33:00,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:33:00,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-04-15 03:33:00,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2021-04-15 03:33:00,724 INFO L87 Difference]: Start difference. First operand 1471 states and 5087 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 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 03:33:01,216 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 43 [2021-04-15 03:33:03,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:33:03,677 INFO L93 Difference]: Finished difference Result 2308 states and 7673 transitions. [2021-04-15 03:33:03,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-04-15 03:33:03,679 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 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 24 [2021-04-15 03:33:03,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:33:03,683 INFO L225 Difference]: With dead ends: 2308 [2021-04-15 03:33:03,683 INFO L226 Difference]: Without dead ends: 2258 [2021-04-15 03:33:03,683 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 762 ImplicationChecksByTransitivity, 2464.1ms TimeCoverageRelationStatistics Valid=381, Invalid=2589, Unknown=0, NotChecked=0, Total=2970 [2021-04-15 03:33:03,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2258 states. [2021-04-15 03:33:03,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2258 to 1475. [2021-04-15 03:33:03,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1475 states, 1474 states have (on average 3.4613297150610585) internal successors, (5102), 1474 states have internal predecessors, (5102), 0 states have call successors, (0), 0 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 03:33:03,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1475 states to 1475 states and 5102 transitions. [2021-04-15 03:33:03,711 INFO L78 Accepts]: Start accepts. Automaton has 1475 states and 5102 transitions. Word has length 24 [2021-04-15 03:33:03,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:33:03,711 INFO L480 AbstractCegarLoop]: Abstraction has 1475 states and 5102 transitions. [2021-04-15 03:33:03,711 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 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 03:33:03,711 INFO L276 IsEmpty]: Start isEmpty. Operand 1475 states and 5102 transitions. [2021-04-15 03:33:03,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 03:33:03,713 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:33:03,713 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 03:33:03,913 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:33:03,914 INFO L428 AbstractCegarLoop]: === Iteration 111 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-04-15 03:33:03,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:33:03,914 INFO L82 PathProgramCache]: Analyzing trace with hash 882373716, now seen corresponding path program 15 times [2021-04-15 03:33:03,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:33:03,914 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705343200] [2021-04-15 03:33:03,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:33:03,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:33:04,304 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 03:33:04,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705343200] [2021-04-15 03:33:04,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666275529] [2021-04-15 03:33:04,304 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:33:04,332 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-04-15 03:33:04,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:33:04,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-04-15 03:33:04,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:33:04,639 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 03:33:04,639 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-04-15 03:33:04,642 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 03:33:04,657 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 03:33:04,658 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 03:33:04,659 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:25 [2021-04-15 03:33:04,771 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 03:33:04,771 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:33:04,771 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 24 [2021-04-15 03:33:04,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595010737] [2021-04-15 03:33:04,771 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-04-15 03:33:04,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:33:04,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-04-15 03:33:04,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2021-04-15 03:33:04,772 INFO L87 Difference]: Start difference. First operand 1475 states and 5102 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:33:05,272 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 57 [2021-04-15 03:33:05,461 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 48 [2021-04-15 03:33:06,438 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 41 [2021-04-15 03:33:07,240 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 45 [2021-04-15 03:33:07,374 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 38 [2021-04-15 03:33:07,875 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 53 [2021-04-15 03:33:08,517 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 43 [2021-04-15 03:33:08,743 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 43 [2021-04-15 03:33:09,137 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 51 [2021-04-15 03:33:09,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:33:09,499 INFO L93 Difference]: Finished difference Result 2288 states and 7644 transitions. [2021-04-15 03:33:09,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-04-15 03:33:09,500 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-04-15 03:33:09,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:33:09,500 INFO L225 Difference]: With dead ends: 2288 [2021-04-15 03:33:09,500 INFO L226 Difference]: Without dead ends: 0 [2021-04-15 03:33:09,500 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1183 ImplicationChecksByTransitivity, 3861.8ms TimeCoverageRelationStatistics Valid=572, Invalid=3588, Unknown=0, NotChecked=0, Total=4160 [2021-04-15 03:33:09,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-04-15 03:33:09,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-04-15 03:33:09,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 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 03:33:09,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-04-15 03:33:09,501 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 24 [2021-04-15 03:33:09,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:33:09,501 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-04-15 03:33:09,501 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:33:09,501 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-04-15 03:33:09,501 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-04-15 03:33:09,701 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable191 [2021-04-15 03:33:09,705 INFO L202 PluginConnector]: Adding new model parallel-sum-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.04 03:33:09 BasicIcfg [2021-04-15 03:33:09,706 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-04-15 03:33:09,706 INFO L168 Benchmark]: Toolchain (without parser) took 164035.18 ms. Allocated memory was 337.6 MB in the beginning and 488.6 MB in the end (delta: 151.0 MB). Free memory was 317.8 MB in the beginning and 212.2 MB in the end (delta: 105.5 MB). Peak memory consumption was 258.0 MB. Max. memory is 16.0 GB. [2021-04-15 03:33:09,706 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.25 ms. Allocated memory is still 337.6 MB. Free memory was 319.0 MB in the beginning and 318.9 MB in the end (delta: 73.6 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-04-15 03:33:09,706 INFO L168 Benchmark]: Boogie Procedure Inliner took 26.42 ms. Allocated memory is still 337.6 MB. Free memory was 317.7 MB in the beginning and 316.2 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-04-15 03:33:09,707 INFO L168 Benchmark]: Boogie Preprocessor took 17.67 ms. Allocated memory is still 337.6 MB. Free memory was 316.2 MB in the beginning and 315.2 MB in the end (delta: 967.8 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-04-15 03:33:09,708 INFO L168 Benchmark]: RCFGBuilder took 297.96 ms. Allocated memory is still 337.6 MB. Free memory was 315.2 MB in the beginning and 299.8 MB in the end (delta: 15.3 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.0 GB. [2021-04-15 03:33:09,708 INFO L168 Benchmark]: TraceAbstraction took 163685.99 ms. Allocated memory was 337.6 MB in the beginning and 488.6 MB in the end (delta: 151.0 MB). Free memory was 299.4 MB in the beginning and 212.2 MB in the end (delta: 87.1 MB). Peak memory consumption was 239.2 MB. Max. memory is 16.0 GB. [2021-04-15 03:33:09,708 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 0.25 ms. Allocated memory is still 337.6 MB. Free memory was 319.0 MB in the beginning and 318.9 MB in the end (delta: 73.6 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 26.42 ms. Allocated memory is still 337.6 MB. Free memory was 317.7 MB in the beginning and 316.2 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 17.67 ms. Allocated memory is still 337.6 MB. Free memory was 316.2 MB in the beginning and 315.2 MB in the end (delta: 967.8 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 297.96 ms. Allocated memory is still 337.6 MB. Free memory was 315.2 MB in the beginning and 299.8 MB in the end (delta: 15.3 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.0 GB. * TraceAbstraction took 163685.99 ms. Allocated memory was 337.6 MB in the beginning and 488.6 MB in the end (delta: 151.0 MB). Free memory was 299.4 MB in the beginning and 212.2 MB in the end (delta: 87.1 MB). Peak memory consumption was 239.2 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 86]: assertion always holds For all program executions holds that assertion always holds at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 26 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 163511.2ms, OverallIterations: 111, TraceHistogramMax: 2, EmptinessCheckTime: 209.1ms, AutomataDifference: 100513.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 33.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 7171 SDtfs, 16211 SDslu, 49754 SDs, 0 SdLazy, 59728 SolverSat, 5412 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 31574.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4444 GetRequests, 1614 SyntacticMatches, 108 SemanticMatches, 2722 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24067 ImplicationChecksByTransitivity, 76203.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1475occurred in iteration=110, InterpolantAutomatonStates: 2361, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 2052.0ms AutomataMinimizationTime, 111 MinimizatonAttempts, 46056 StatesRemovedByMinimization, 109 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 580.7ms SsaConstructionTime, 1368.8ms SatisfiabilityAnalysisTime, 35612.9ms InterpolantComputationTime, 4508 NumberOfCodeBlocks, 4508 NumberOfCodeBlocksAsserted, 312 NumberOfCheckSat, 4298 ConstructedInterpolants, 137 QuantifiedInterpolants, 45406 SizeOfPredicates, 610 NumberOfNonLiveVariables, 7518 ConjunctsInSsa, 1973 ConjunctsInUnsatCore, 210 InterpolantComputations, 12 PerfectInterpolantSequences, 164/862 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 proved your program to be correct! Received shutdown request...