/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 0.2.1-7cd14b8b9f04096d8ddfd3d9cd8a4ac590fe5404-7cd14b8 [2021-03-10 22:32:11,682 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-10 22:32:11,684 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-10 22:32:11,707 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-03-10 22:32:11,747 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-03-10 22:32:11,748 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-03-10 22:32:11,748 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-03-10 22:32:11,751 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 [2021-03-10 22:32:11,777 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-10 22:32:11,777 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-10 22:32:11,777 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-03-10 22:32:11,777 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-03-10 22:32:11,779 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-10 22:32:11,779 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-10 22:32:11,779 INFO L138 SettingsManager]: * Use SBE=true [2021-03-10 22:32:11,780 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-10 22:32:11,780 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-10 22:32:11,780 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-10 22:32:11,780 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-10 22:32:11,781 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-10 22:32:11,781 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-10 22:32:11,781 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-10 22:32:11,781 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-10 22:32:11,781 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-10 22:32:11,781 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-10 22:32:11,781 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-10 22:32:11,781 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-10 22:32:11,781 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-10 22:32:11,781 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-10 22:32:11,782 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-10 22:32:11,782 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-10 22:32:11,782 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-10 22:32:11,782 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-10 22:32:11,782 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-10 22:32:11,782 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-10 22:32:11,782 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-10 22:32:11,782 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-10 22:32:11,782 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-03-10 22:32:11,782 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-03-10 22:32:11,783 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-10 22:32:12,031 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-10 22:32:12,049 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-10 22:32:12,051 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-10 22:32:12,052 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-03-10 22:32:12,053 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-03-10 22:32:12,053 INFO L432 ainManager$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 [2021-03-10 22:32:12,053 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/parallel-sum-equiv.wvr.bpl' [2021-03-10 22:32:12,092 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-10 22:32:12,095 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-03-10 22:32:12,096 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-10 22:32:12,097 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-10 22:32:12,097 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-10 22:32:12,105 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 10.03 10:32:12" (1/1) ... [2021-03-10 22:32:12,110 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 10.03 10:32:12" (1/1) ... [2021-03-10 22:32:12,114 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-10 22:32:12,115 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-10 22:32:12,115 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-10 22:32:12,116 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-10 22:32:12,120 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 10.03 10:32:12" (1/1) ... [2021-03-10 22:32:12,121 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 10.03 10:32:12" (1/1) ... [2021-03-10 22:32:12,122 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 10.03 10:32:12" (1/1) ... [2021-03-10 22:32:12,122 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 10.03 10:32:12" (1/1) ... [2021-03-10 22:32:12,125 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 10.03 10:32:12" (1/1) ... [2021-03-10 22:32:12,127 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 10.03 10:32:12" (1/1) ... [2021-03-10 22:32:12,127 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 10.03 10:32:12" (1/1) ... [2021-03-10 22:32:12,128 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-10 22:32:12,129 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-10 22:32:12,129 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-10 22:32:12,129 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-10 22:32:12,131 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "parallel-sum-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 10:32:12" (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 [2021-03-10 22:32:12,176 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-03-10 22:32:12,177 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-03-10 22:32:12,177 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-03-10 22:32:12,177 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-03-10 22:32:12,177 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-03-10 22:32:12,177 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-03-10 22:32:12,177 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-03-10 22:32:12,177 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-10 22:32:12,177 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-10 22:32:12,178 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-03-10 22:32:12,178 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-03-10 22:32:12,178 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-03-10 22:32:12,178 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-03-10 22:32:12,178 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-03-10 22:32:12,178 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-03-10 22:32:12,179 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-03-10 22:32:12,313 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-10 22:32:12,313 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-03-10 22:32:12,314 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread2EXIT is neither atomic block end nor error location. [2021-03-10 22:32:12,314 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread3EXIT is neither atomic block end nor error location. [2021-03-10 22:32:12,314 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread4EXIT is neither atomic block end nor error location. [2021-03-10 22:32:12,315 INFO L202 PluginConnector]: Adding new model parallel-sum-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.03 10:32:12 BoogieIcfgContainer [2021-03-10 22:32:12,315 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-10 22:32:12,316 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-10 22:32:12,317 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-10 22:32:12,318 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-10 22:32:12,318 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "parallel-sum-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 10:32:12" (1/2) ... [2021-03-10 22:32:12,319 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@609c9f0a and model type parallel-sum-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.03 10:32:12, skipping insertion in model container [2021-03-10 22:32:12,319 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 10.03 10:32:12" (2/2) ... [2021-03-10 22:32:12,320 INFO L111 eAbstractionObserver]: Analyzing ICFG parallel-sum-equiv.wvr.bpl [2021-03-10 22:32:12,324 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-03-10 22:32:12,324 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-10 22:32:12,326 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-10 22:32:12,327 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-10 22:32:12,371 INFO L149 ThreadInstanceAdder]: Constructed 10 joinOtherThreadTransitions. [2021-03-10 22:32:12,381 INFO L253 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2021-03-10 22:32:12,392 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-10 22:32:12,392 INFO L377 AbstractCegarLoop]: Hoare is true [2021-03-10 22:32:12,392 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-10 22:32:12,392 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-10 22:32:12,392 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-10 22:32:12,392 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-10 22:32:12,393 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-10 22:32:12,393 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-10 22:32:12,398 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 41 places, 33 transitions, 110 flow [2021-03-10 22:32:12,411 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) [2021-03-10 22:32:12,412 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) [2021-03-10 22:32:12,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 22:32:12,417 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:32:12,418 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:32:12,418 INFO L428 AbstractCegarLoop]: === Iteration 1 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-03-10 22:32:12,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:32:12,421 INFO L82 PathProgramCache]: Analyzing trace with hash 848381826, now seen corresponding path program 1 times [2021-03-10 22:32:12,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:32:12,426 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538094643] [2021-03-10 22:32:12,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:32:12,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:32:12,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:12,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538094643] [2021-03-10 22:32:12,563 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 22:32:12,563 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-10 22:32:12,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790452453] [2021-03-10 22:32:12,566 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-10 22:32:12,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:32:12,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-10 22:32:12,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-10 22:32:12,575 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) [2021-03-10 22:32:12,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:32:12,617 INFO L93 Difference]: Finished difference Result 253 states and 745 transitions. [2021-03-10 22:32:12,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-10 22:32:12,618 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 [2021-03-10 22:32:12,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:32:12,625 INFO L225 Difference]: With dead ends: 253 [2021-03-10 22:32:12,626 INFO L226 Difference]: Without dead ends: 247 [2021-03-10 22:32:12,626 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-03-10 22:32:12,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-03-10 22:32:12,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 143. [2021-03-10 22:32:12,655 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) [2021-03-10 22:32:12,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 417 transitions. [2021-03-10 22:32:12,657 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 417 transitions. Word has length 16 [2021-03-10 22:32:12,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:32:12,658 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 417 transitions. [2021-03-10 22:32:12,658 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) [2021-03-10 22:32:12,658 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 417 transitions. [2021-03-10 22:32:12,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 22:32:12,659 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:32:12,659 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:32:12,660 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-10 22:32:12,660 INFO L428 AbstractCegarLoop]: === Iteration 2 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-03-10 22:32:12,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:32:12,660 INFO L82 PathProgramCache]: Analyzing trace with hash 890214852, now seen corresponding path program 2 times [2021-03-10 22:32:12,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:32:12,661 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789705224] [2021-03-10 22:32:12,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:32:12,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:32:12,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:12,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789705224] [2021-03-10 22:32:12,702 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 22:32:12,703 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-10 22:32:12,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042267435] [2021-03-10 22:32:12,704 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-10 22:32:12,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:32:12,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-10 22:32:12,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-10 22:32:12,705 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) [2021-03-10 22:32:12,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:32:12,732 INFO L93 Difference]: Finished difference Result 262 states and 765 transitions. [2021-03-10 22:32:12,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-10 22:32:12,732 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 [2021-03-10 22:32:12,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:32:12,734 INFO L225 Difference]: With dead ends: 262 [2021-03-10 22:32:12,734 INFO L226 Difference]: Without dead ends: 256 [2021-03-10 22:32:12,734 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-03-10 22:32:12,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-03-10 22:32:12,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 145. [2021-03-10 22:32:12,744 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) [2021-03-10 22:32:12,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 421 transitions. [2021-03-10 22:32:12,745 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 421 transitions. Word has length 16 [2021-03-10 22:32:12,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:32:12,745 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 421 transitions. [2021-03-10 22:32:12,746 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) [2021-03-10 22:32:12,746 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 421 transitions. [2021-03-10 22:32:12,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 22:32:12,747 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:32:12,747 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:32:12,747 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-03-10 22:32:12,747 INFO L428 AbstractCegarLoop]: === Iteration 3 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-03-10 22:32:12,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:32:12,748 INFO L82 PathProgramCache]: Analyzing trace with hash -1702344252, now seen corresponding path program 1 times [2021-03-10 22:32:12,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:32:12,748 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844908096] [2021-03-10 22:32:12,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:32:12,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:32:12,781 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:12,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844908096] [2021-03-10 22:32:12,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49823553] [2021-03-10 22:32:12,782 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 [2021-03-10 22:32:12,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:32:12,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 4 conjunts are in the unsatisfiable core [2021-03-10 22:32:12,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:32:12,890 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:12,890 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:32:12,891 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-03-10 22:32:12,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866260452] [2021-03-10 22:32:12,891 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-10 22:32:12,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:32:12,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-10 22:32:12,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-03-10 22:32:12,892 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) [2021-03-10 22:32:12,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:32:12,968 INFO L93 Difference]: Finished difference Result 199 states and 578 transitions. [2021-03-10 22:32:12,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-10 22:32:12,969 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 [2021-03-10 22:32:12,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:32:12,970 INFO L225 Difference]: With dead ends: 199 [2021-03-10 22:32:12,970 INFO L226 Difference]: Without dead ends: 199 [2021-03-10 22:32:12,970 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 32.5ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-03-10 22:32:12,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-03-10 22:32:12,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 149. [2021-03-10 22:32:12,978 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) [2021-03-10 22:32:12,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 445 transitions. [2021-03-10 22:32:12,979 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 445 transitions. Word has length 18 [2021-03-10 22:32:12,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:32:12,979 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 445 transitions. [2021-03-10 22:32:12,979 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) [2021-03-10 22:32:12,979 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 445 transitions. [2021-03-10 22:32:12,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 22:32:12,980 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:32:12,980 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:32:13,193 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-03-10 22:32:13,194 INFO L428 AbstractCegarLoop]: === Iteration 4 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-03-10 22:32:13,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:32:13,194 INFO L82 PathProgramCache]: Analyzing trace with hash -735916285, now seen corresponding path program 1 times [2021-03-10 22:32:13,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:32:13,195 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192129482] [2021-03-10 22:32:13,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:32:13,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:32:13,234 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:13,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192129482] [2021-03-10 22:32:13,235 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 22:32:13,235 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-10 22:32:13,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200544580] [2021-03-10 22:32:13,235 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-10 22:32:13,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:32:13,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-10 22:32:13,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-10 22:32:13,238 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) [2021-03-10 22:32:13,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:32:13,292 INFO L93 Difference]: Finished difference Result 246 states and 702 transitions. [2021-03-10 22:32:13,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 22:32:13,292 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 [2021-03-10 22:32:13,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:32:13,294 INFO L225 Difference]: With dead ends: 246 [2021-03-10 22:32:13,294 INFO L226 Difference]: Without dead ends: 214 [2021-03-10 22:32:13,294 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 22.9ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-03-10 22:32:13,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-03-10 22:32:13,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 164. [2021-03-10 22:32:13,314 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) [2021-03-10 22:32:13,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 473 transitions. [2021-03-10 22:32:13,316 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 473 transitions. Word has length 18 [2021-03-10 22:32:13,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:32:13,316 INFO L480 AbstractCegarLoop]: Abstraction has 164 states and 473 transitions. [2021-03-10 22:32:13,316 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) [2021-03-10 22:32:13,316 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 473 transitions. [2021-03-10 22:32:13,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 22:32:13,320 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:32:13,320 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:32:13,320 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-03-10 22:32:13,320 INFO L428 AbstractCegarLoop]: === Iteration 5 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-03-10 22:32:13,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:32:13,320 INFO L82 PathProgramCache]: Analyzing trace with hash -1382578898, now seen corresponding path program 1 times [2021-03-10 22:32:13,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:32:13,321 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939375844] [2021-03-10 22:32:13,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:32:13,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:32:13,343 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:13,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939375844] [2021-03-10 22:32:13,346 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 22:32:13,346 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-10 22:32:13,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716557347] [2021-03-10 22:32:13,346 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-10 22:32:13,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:32:13,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-10 22:32:13,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-10 22:32:13,348 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) [2021-03-10 22:32:13,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:32:13,358 INFO L93 Difference]: Finished difference Result 153 states and 416 transitions. [2021-03-10 22:32:13,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-10 22:32:13,358 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 [2021-03-10 22:32:13,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:32:13,359 INFO L225 Difference]: With dead ends: 153 [2021-03-10 22:32:13,359 INFO L226 Difference]: Without dead ends: 137 [2021-03-10 22:32:13,359 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-10 22:32:13,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-03-10 22:32:13,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 133. [2021-03-10 22:32:13,366 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) [2021-03-10 22:32:13,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 369 transitions. [2021-03-10 22:32:13,367 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 369 transitions. Word has length 18 [2021-03-10 22:32:13,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:32:13,367 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 369 transitions. [2021-03-10 22:32:13,367 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) [2021-03-10 22:32:13,367 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 369 transitions. [2021-03-10 22:32:13,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 22:32:13,369 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:32:13,369 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:32:13,369 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-03-10 22:32:13,369 INFO L428 AbstractCegarLoop]: === Iteration 6 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-03-10 22:32:13,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:32:13,369 INFO L82 PathProgramCache]: Analyzing trace with hash -1747969668, now seen corresponding path program 2 times [2021-03-10 22:32:13,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:32:13,370 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573483395] [2021-03-10 22:32:13,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:32:13,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:32:13,413 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:13,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573483395] [2021-03-10 22:32:13,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080932762] [2021-03-10 22:32:13,414 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 [2021-03-10 22:32:13,441 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:32:13,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:32:13,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 4 conjunts are in the unsatisfiable core [2021-03-10 22:32:13,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:32:13,525 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:13,525 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:32:13,525 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-03-10 22:32:13,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943646492] [2021-03-10 22:32:13,526 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 22:32:13,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:32:13,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 22:32:13,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-03-10 22:32:13,527 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) [2021-03-10 22:32:13,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:32:13,570 INFO L93 Difference]: Finished difference Result 205 states and 550 transitions. [2021-03-10 22:32:13,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-10 22:32:13,571 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 [2021-03-10 22:32:13,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:32:13,572 INFO L225 Difference]: With dead ends: 205 [2021-03-10 22:32:13,572 INFO L226 Difference]: Without dead ends: 205 [2021-03-10 22:32:13,573 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 23.3ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-03-10 22:32:13,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-03-10 22:32:13,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 136. [2021-03-10 22:32:13,576 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) [2021-03-10 22:32:13,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 383 transitions. [2021-03-10 22:32:13,579 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 383 transitions. Word has length 18 [2021-03-10 22:32:13,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:32:13,580 INFO L480 AbstractCegarLoop]: Abstraction has 136 states and 383 transitions. [2021-03-10 22:32:13,580 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) [2021-03-10 22:32:13,580 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 383 transitions. [2021-03-10 22:32:13,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 22:32:13,580 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:32:13,580 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:32:13,797 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:32:13,797 INFO L428 AbstractCegarLoop]: === Iteration 7 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-03-10 22:32:13,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:32:13,798 INFO L82 PathProgramCache]: Analyzing trace with hash -141666181, now seen corresponding path program 2 times [2021-03-10 22:32:13,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:32:13,798 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061669003] [2021-03-10 22:32:13,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:32:13,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:32:13,830 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:13,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061669003] [2021-03-10 22:32:13,830 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 22:32:13,830 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-10 22:32:13,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271697352] [2021-03-10 22:32:13,831 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-10 22:32:13,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:32:13,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-10 22:32:13,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-10 22:32:13,832 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) [2021-03-10 22:32:13,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:32:13,903 INFO L93 Difference]: Finished difference Result 253 states and 641 transitions. [2021-03-10 22:32:13,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 22:32:13,903 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 [2021-03-10 22:32:13,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:32:13,904 INFO L225 Difference]: With dead ends: 253 [2021-03-10 22:32:13,904 INFO L226 Difference]: Without dead ends: 244 [2021-03-10 22:32:13,905 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 26.0ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-03-10 22:32:13,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-03-10 22:32:13,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 160. [2021-03-10 22:32:13,910 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) [2021-03-10 22:32:13,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 447 transitions. [2021-03-10 22:32:13,910 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 447 transitions. Word has length 18 [2021-03-10 22:32:13,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:32:13,911 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 447 transitions. [2021-03-10 22:32:13,911 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) [2021-03-10 22:32:13,911 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 447 transitions. [2021-03-10 22:32:13,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 22:32:13,911 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:32:13,911 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:32:13,911 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-03-10 22:32:13,911 INFO L428 AbstractCegarLoop]: === Iteration 8 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-03-10 22:32:13,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:32:13,912 INFO L82 PathProgramCache]: Analyzing trace with hash -2044687976, now seen corresponding path program 3 times [2021-03-10 22:32:13,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:32:13,912 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792301213] [2021-03-10 22:32:13,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:32:13,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:32:13,955 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:13,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792301213] [2021-03-10 22:32:13,956 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 22:32:13,956 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-10 22:32:13,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632376212] [2021-03-10 22:32:13,956 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-10 22:32:13,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:32:13,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-10 22:32:13,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-10 22:32:13,957 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) [2021-03-10 22:32:14,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:32:14,001 INFO L93 Difference]: Finished difference Result 211 states and 560 transitions. [2021-03-10 22:32:14,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-10 22:32:14,002 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 [2021-03-10 22:32:14,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:32:14,003 INFO L225 Difference]: With dead ends: 211 [2021-03-10 22:32:14,003 INFO L226 Difference]: Without dead ends: 208 [2021-03-10 22:32:14,003 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 29.3ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-03-10 22:32:14,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-03-10 22:32:14,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 160. [2021-03-10 22:32:14,006 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) [2021-03-10 22:32:14,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 444 transitions. [2021-03-10 22:32:14,007 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 444 transitions. Word has length 18 [2021-03-10 22:32:14,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:32:14,007 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 444 transitions. [2021-03-10 22:32:14,007 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) [2021-03-10 22:32:14,007 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 444 transitions. [2021-03-10 22:32:14,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 22:32:14,008 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:32:14,008 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:32:14,008 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-03-10 22:32:14,008 INFO L428 AbstractCegarLoop]: === Iteration 9 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-03-10 22:32:14,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:32:14,008 INFO L82 PathProgramCache]: Analyzing trace with hash 1877852891, now seen corresponding path program 3 times [2021-03-10 22:32:14,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:32:14,008 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578014844] [2021-03-10 22:32:14,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:32:14,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:32:14,036 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:14,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578014844] [2021-03-10 22:32:14,037 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 22:32:14,037 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-10 22:32:14,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257965535] [2021-03-10 22:32:14,037 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-10 22:32:14,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:32:14,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-10 22:32:14,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-10 22:32:14,038 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) [2021-03-10 22:32:14,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:32:14,090 INFO L93 Difference]: Finished difference Result 190 states and 515 transitions. [2021-03-10 22:32:14,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-10 22:32:14,090 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 [2021-03-10 22:32:14,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:32:14,091 INFO L225 Difference]: With dead ends: 190 [2021-03-10 22:32:14,091 INFO L226 Difference]: Without dead ends: 190 [2021-03-10 22:32:14,091 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.8ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-03-10 22:32:14,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-03-10 22:32:14,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 142. [2021-03-10 22:32:14,094 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) [2021-03-10 22:32:14,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 396 transitions. [2021-03-10 22:32:14,095 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 396 transitions. Word has length 18 [2021-03-10 22:32:14,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:32:14,095 INFO L480 AbstractCegarLoop]: Abstraction has 142 states and 396 transitions. [2021-03-10 22:32:14,095 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) [2021-03-10 22:32:14,095 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 396 transitions. [2021-03-10 22:32:14,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 22:32:14,095 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:32:14,095 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:32:14,095 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-03-10 22:32:14,096 INFO L428 AbstractCegarLoop]: === Iteration 10 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-03-10 22:32:14,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:32:14,096 INFO L82 PathProgramCache]: Analyzing trace with hash -663824830, now seen corresponding path program 4 times [2021-03-10 22:32:14,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:32:14,096 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385280702] [2021-03-10 22:32:14,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:32:14,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:32:14,113 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:14,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385280702] [2021-03-10 22:32:14,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911536236] [2021-03-10 22:32:14,113 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 [2021-03-10 22:32:14,140 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:32:14,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:32:14,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 4 conjunts are in the unsatisfiable core [2021-03-10 22:32:14,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:32:14,186 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:14,186 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:32:14,187 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-03-10 22:32:14,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132122311] [2021-03-10 22:32:14,187 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 22:32:14,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:32:14,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 22:32:14,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-03-10 22:32:14,188 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) [2021-03-10 22:32:14,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:32:14,229 INFO L93 Difference]: Finished difference Result 193 states and 511 transitions. [2021-03-10 22:32:14,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-10 22:32:14,229 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 [2021-03-10 22:32:14,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:32:14,230 INFO L225 Difference]: With dead ends: 193 [2021-03-10 22:32:14,230 INFO L226 Difference]: Without dead ends: 193 [2021-03-10 22:32:14,230 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 24.3ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-03-10 22:32:14,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-03-10 22:32:14,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 142. [2021-03-10 22:32:14,233 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) [2021-03-10 22:32:14,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 396 transitions. [2021-03-10 22:32:14,233 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 396 transitions. Word has length 18 [2021-03-10 22:32:14,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:32:14,233 INFO L480 AbstractCegarLoop]: Abstraction has 142 states and 396 transitions. [2021-03-10 22:32:14,234 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) [2021-03-10 22:32:14,234 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 396 transitions. [2021-03-10 22:32:14,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 22:32:14,234 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:32:14,234 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:32:14,448 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-03-10 22:32:14,449 INFO L428 AbstractCegarLoop]: === Iteration 11 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-03-10 22:32:14,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:32:14,449 INFO L82 PathProgramCache]: Analyzing trace with hash 810916037, now seen corresponding path program 4 times [2021-03-10 22:32:14,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:32:14,449 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154411352] [2021-03-10 22:32:14,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:32:14,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:32:14,465 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:14,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154411352] [2021-03-10 22:32:14,466 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 22:32:14,466 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-10 22:32:14,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066964575] [2021-03-10 22:32:14,466 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-10 22:32:14,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:32:14,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-10 22:32:14,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-10 22:32:14,467 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) [2021-03-10 22:32:14,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:32:14,510 INFO L93 Difference]: Finished difference Result 197 states and 512 transitions. [2021-03-10 22:32:14,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-10 22:32:14,511 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 [2021-03-10 22:32:14,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:32:14,512 INFO L225 Difference]: With dead ends: 197 [2021-03-10 22:32:14,512 INFO L226 Difference]: Without dead ends: 188 [2021-03-10 22:32:14,512 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 20.5ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-03-10 22:32:14,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-03-10 22:32:14,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 164. [2021-03-10 22:32:14,515 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) [2021-03-10 22:32:14,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 455 transitions. [2021-03-10 22:32:14,516 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 455 transitions. Word has length 18 [2021-03-10 22:32:14,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:32:14,516 INFO L480 AbstractCegarLoop]: Abstraction has 164 states and 455 transitions. [2021-03-10 22:32:14,516 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) [2021-03-10 22:32:14,516 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 455 transitions. [2021-03-10 22:32:14,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 22:32:14,516 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:32:14,516 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:32:14,516 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-03-10 22:32:14,517 INFO L428 AbstractCegarLoop]: === Iteration 12 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-03-10 22:32:14,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:32:14,517 INFO L82 PathProgramCache]: Analyzing trace with hash -951885686, now seen corresponding path program 5 times [2021-03-10 22:32:14,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:32:14,517 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636061644] [2021-03-10 22:32:14,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:32:14,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:32:14,540 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:14,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636061644] [2021-03-10 22:32:14,540 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 22:32:14,540 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-10 22:32:14,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418385081] [2021-03-10 22:32:14,541 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-10 22:32:14,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:32:14,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-10 22:32:14,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-10 22:32:14,542 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) [2021-03-10 22:32:14,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:32:14,603 INFO L93 Difference]: Finished difference Result 248 states and 641 transitions. [2021-03-10 22:32:14,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 22:32:14,618 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 [2021-03-10 22:32:14,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:32:14,619 INFO L225 Difference]: With dead ends: 248 [2021-03-10 22:32:14,619 INFO L226 Difference]: Without dead ends: 245 [2021-03-10 22:32:14,619 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 27.3ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-03-10 22:32:14,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-03-10 22:32:14,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 164. [2021-03-10 22:32:14,622 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) [2021-03-10 22:32:14,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 452 transitions. [2021-03-10 22:32:14,623 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 452 transitions. Word has length 18 [2021-03-10 22:32:14,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:32:14,623 INFO L480 AbstractCegarLoop]: Abstraction has 164 states and 452 transitions. [2021-03-10 22:32:14,623 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) [2021-03-10 22:32:14,623 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 452 transitions. [2021-03-10 22:32:14,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 22:32:14,624 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:32:14,624 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:32:14,624 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-03-10 22:32:14,625 INFO L428 AbstractCegarLoop]: === Iteration 13 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-03-10 22:32:14,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:32:14,625 INFO L82 PathProgramCache]: Analyzing trace with hash -1324312115, now seen corresponding path program 5 times [2021-03-10 22:32:14,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:32:14,625 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92674405] [2021-03-10 22:32:14,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:32:14,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:32:14,648 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:14,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92674405] [2021-03-10 22:32:14,649 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 22:32:14,649 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-10 22:32:14,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443882051] [2021-03-10 22:32:14,650 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-10 22:32:14,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:32:14,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-10 22:32:14,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-10 22:32:14,652 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) [2021-03-10 22:32:14,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:32:14,685 INFO L93 Difference]: Finished difference Result 190 states and 503 transitions. [2021-03-10 22:32:14,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-10 22:32:14,686 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 [2021-03-10 22:32:14,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:32:14,687 INFO L225 Difference]: With dead ends: 190 [2021-03-10 22:32:14,687 INFO L226 Difference]: Without dead ends: 190 [2021-03-10 22:32:14,687 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.2ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-03-10 22:32:14,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-03-10 22:32:14,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 161. [2021-03-10 22:32:14,689 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) [2021-03-10 22:32:14,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 444 transitions. [2021-03-10 22:32:14,690 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 444 transitions. Word has length 18 [2021-03-10 22:32:14,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:32:14,690 INFO L480 AbstractCegarLoop]: Abstraction has 161 states and 444 transitions. [2021-03-10 22:32:14,690 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) [2021-03-10 22:32:14,691 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 444 transitions. [2021-03-10 22:32:14,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 22:32:14,692 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:32:14,692 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:32:14,692 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-03-10 22:32:14,692 INFO L428 AbstractCegarLoop]: === Iteration 14 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-03-10 22:32:14,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:32:14,692 INFO L82 PathProgramCache]: Analyzing trace with hash 11936556, now seen corresponding path program 6 times [2021-03-10 22:32:14,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:32:14,693 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730338809] [2021-03-10 22:32:14,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:32:14,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:32:14,712 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:14,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730338809] [2021-03-10 22:32:14,712 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 22:32:14,713 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-10 22:32:14,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032259979] [2021-03-10 22:32:14,713 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-10 22:32:14,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:32:14,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-10 22:32:14,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-10 22:32:14,713 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) [2021-03-10 22:32:14,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:32:14,754 INFO L93 Difference]: Finished difference Result 164 states and 446 transitions. [2021-03-10 22:32:14,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 22:32:14,755 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 [2021-03-10 22:32:14,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:32:14,755 INFO L225 Difference]: With dead ends: 164 [2021-03-10 22:32:14,755 INFO L226 Difference]: Without dead ends: 160 [2021-03-10 22:32:14,756 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 19.5ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-03-10 22:32:14,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-03-10 22:32:14,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2021-03-10 22:32:14,758 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) [2021-03-10 22:32:14,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 442 transitions. [2021-03-10 22:32:14,759 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 442 transitions. Word has length 18 [2021-03-10 22:32:14,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:32:14,759 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 442 transitions. [2021-03-10 22:32:14,759 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) [2021-03-10 22:32:14,759 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 442 transitions. [2021-03-10 22:32:14,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 22:32:14,760 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:32:14,760 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:32:14,760 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-03-10 22:32:14,760 INFO L428 AbstractCegarLoop]: === Iteration 15 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-03-10 22:32:14,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:32:14,760 INFO L82 PathProgramCache]: Analyzing trace with hash 459545933, now seen corresponding path program 6 times [2021-03-10 22:32:14,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:32:14,760 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129271941] [2021-03-10 22:32:14,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:32:14,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:32:14,778 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:14,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129271941] [2021-03-10 22:32:14,778 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 22:32:14,779 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-10 22:32:14,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474586321] [2021-03-10 22:32:14,779 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-10 22:32:14,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:32:14,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-10 22:32:14,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-10 22:32:14,779 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) [2021-03-10 22:32:14,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:32:14,809 INFO L93 Difference]: Finished difference Result 153 states and 422 transitions. [2021-03-10 22:32:14,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-10 22:32:14,809 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 [2021-03-10 22:32:14,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:32:14,810 INFO L225 Difference]: With dead ends: 153 [2021-03-10 22:32:14,810 INFO L226 Difference]: Without dead ends: 153 [2021-03-10 22:32:14,811 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.4ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-03-10 22:32:14,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-03-10 22:32:14,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 135. [2021-03-10 22:32:14,813 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) [2021-03-10 22:32:14,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 374 transitions. [2021-03-10 22:32:14,814 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 374 transitions. Word has length 18 [2021-03-10 22:32:14,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:32:14,814 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 374 transitions. [2021-03-10 22:32:14,814 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) [2021-03-10 22:32:14,815 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 374 transitions. [2021-03-10 22:32:14,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:32:14,815 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:32:14,815 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:32:14,815 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-03-10 22:32:14,815 INFO L428 AbstractCegarLoop]: === Iteration 16 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-03-10 22:32:14,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:32:14,815 INFO L82 PathProgramCache]: Analyzing trace with hash 442648773, now seen corresponding path program 1 times [2021-03-10 22:32:14,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:32:14,816 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198233389] [2021-03-10 22:32:14,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:32:14,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:32:14,896 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:14,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198233389] [2021-03-10 22:32:14,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117046829] [2021-03-10 22:32:14,896 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 [2021-03-10 22:32:14,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:32:14,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:32:14,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:32:15,049 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 [2021-03-10 22:32:15,051 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:32:15,054 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:32:15,055 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:32:15,055 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:10 [2021-03-10 22:32:15,084 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:15,085 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:32:15,085 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-03-10 22:32:15,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594495479] [2021-03-10 22:32:15,085 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:32:15,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:32:15,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:32:15,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:32:15,086 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) [2021-03-10 22:32:15,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:32:15,431 INFO L93 Difference]: Finished difference Result 382 states and 1086 transitions. [2021-03-10 22:32:15,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 22:32:15,432 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 [2021-03-10 22:32:15,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:32:15,433 INFO L225 Difference]: With dead ends: 382 [2021-03-10 22:32:15,433 INFO L226 Difference]: Without dead ends: 372 [2021-03-10 22:32:15,434 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 206.2ms TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:32:15,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2021-03-10 22:32:15,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 186. [2021-03-10 22:32:15,437 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) [2021-03-10 22:32:15,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 521 transitions. [2021-03-10 22:32:15,438 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 521 transitions. Word has length 20 [2021-03-10 22:32:15,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:32:15,439 INFO L480 AbstractCegarLoop]: Abstraction has 186 states and 521 transitions. [2021-03-10 22:32:15,439 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) [2021-03-10 22:32:15,439 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 521 transitions. [2021-03-10 22:32:15,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:32:15,439 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:32:15,439 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:32:15,655 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:32:15,655 INFO L428 AbstractCegarLoop]: === Iteration 17 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-03-10 22:32:15,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:32:15,655 INFO L82 PathProgramCache]: Analyzing trace with hash 600946541, now seen corresponding path program 2 times [2021-03-10 22:32:15,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:32:15,656 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355372610] [2021-03-10 22:32:15,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:32:15,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:32:15,758 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:15,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355372610] [2021-03-10 22:32:15,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462558798] [2021-03-10 22:32:15,759 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 22:32:15,783 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:32:15,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:32:15,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:32:15,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:32:15,945 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:32:15,945 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 [2021-03-10 22:32:15,948 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-10 22:32:15,957 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:32:15,974 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:32:15,974 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:20 [2021-03-10 22:32:16,045 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:16,045 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:32:16,045 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-03-10 22:32:16,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284816773] [2021-03-10 22:32:16,045 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:32:16,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:32:16,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:32:16,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:32:16,046 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) [2021-03-10 22:32:16,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:32:16,913 INFO L93 Difference]: Finished difference Result 399 states and 1155 transitions. [2021-03-10 22:32:16,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-10 22:32:16,913 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 [2021-03-10 22:32:16,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:32:16,915 INFO L225 Difference]: With dead ends: 399 [2021-03-10 22:32:16,915 INFO L226 Difference]: Without dead ends: 389 [2021-03-10 22:32:16,916 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 624.9ms TimeCoverageRelationStatistics Valid=219, Invalid=1041, Unknown=0, NotChecked=0, Total=1260 [2021-03-10 22:32:16,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2021-03-10 22:32:16,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 189. [2021-03-10 22:32:16,920 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) [2021-03-10 22:32:16,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 530 transitions. [2021-03-10 22:32:16,920 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 530 transitions. Word has length 20 [2021-03-10 22:32:16,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:32:16,921 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 530 transitions. [2021-03-10 22:32:16,921 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) [2021-03-10 22:32:16,921 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 530 transitions. [2021-03-10 22:32:16,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:32:16,921 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:32:16,921 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:32:17,137 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-03-10 22:32:17,138 INFO L428 AbstractCegarLoop]: === Iteration 18 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-03-10 22:32:17,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:32:17,138 INFO L82 PathProgramCache]: Analyzing trace with hash 424405109, now seen corresponding path program 3 times [2021-03-10 22:32:17,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:32:17,138 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102015965] [2021-03-10 22:32:17,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:32:17,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:32:17,234 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:17,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102015965] [2021-03-10 22:32:17,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245551363] [2021-03-10 22:32:17,235 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 [2021-03-10 22:32:17,268 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 22:32:17,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:32:17,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:32:17,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:32:17,323 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:32:17,324 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 [2021-03-10 22:32:17,325 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-10 22:32:17,333 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:32:17,334 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:32:17,334 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-03-10 22:32:17,438 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:17,439 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:32:17,439 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-03-10 22:32:17,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272427263] [2021-03-10 22:32:17,439 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:32:17,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:32:17,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:32:17,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:32:17,440 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) [2021-03-10 22:32:18,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:32:18,139 INFO L93 Difference]: Finished difference Result 363 states and 1048 transitions. [2021-03-10 22:32:18,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 22:32:18,139 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 [2021-03-10 22:32:18,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:32:18,140 INFO L225 Difference]: With dead ends: 363 [2021-03-10 22:32:18,140 INFO L226 Difference]: Without dead ends: 353 [2021-03-10 22:32:18,141 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 562.1ms TimeCoverageRelationStatistics Valid=214, Invalid=976, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 22:32:18,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-03-10 22:32:18,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 192. [2021-03-10 22:32:18,144 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) [2021-03-10 22:32:18,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 539 transitions. [2021-03-10 22:32:18,144 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 539 transitions. Word has length 20 [2021-03-10 22:32:18,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:32:18,145 INFO L480 AbstractCegarLoop]: Abstraction has 192 states and 539 transitions. [2021-03-10 22:32:18,145 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) [2021-03-10 22:32:18,145 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 539 transitions. [2021-03-10 22:32:18,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:32:18,145 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:32:18,145 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:32:18,365 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:32:18,365 INFO L428 AbstractCegarLoop]: === Iteration 19 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-03-10 22:32:18,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:32:18,365 INFO L82 PathProgramCache]: Analyzing trace with hash -409333331, now seen corresponding path program 4 times [2021-03-10 22:32:18,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:32:18,365 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354600629] [2021-03-10 22:32:18,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:32:18,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:32:18,465 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:18,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354600629] [2021-03-10 22:32:18,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276380303] [2021-03-10 22:32:18,465 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 22:32:18,497 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:32:18,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:32:18,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:32:18,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:32:18,569 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:32:18,570 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 [2021-03-10 22:32:18,571 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:32:18,576 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:32:18,578 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:32:18,578 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-03-10 22:32:18,621 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:18,621 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:32:18,622 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-03-10 22:32:18,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151358129] [2021-03-10 22:32:18,623 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:32:18,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:32:18,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:32:18,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:32:18,623 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) [2021-03-10 22:32:19,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:32:19,052 INFO L93 Difference]: Finished difference Result 310 states and 882 transitions. [2021-03-10 22:32:19,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 22:32:19,052 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 [2021-03-10 22:32:19,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:32:19,053 INFO L225 Difference]: With dead ends: 310 [2021-03-10 22:32:19,053 INFO L226 Difference]: Without dead ends: 298 [2021-03-10 22:32:19,054 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 299.8ms TimeCoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:32:19,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2021-03-10 22:32:19,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 210. [2021-03-10 22:32:19,057 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) [2021-03-10 22:32:19,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 601 transitions. [2021-03-10 22:32:19,057 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 601 transitions. Word has length 20 [2021-03-10 22:32:19,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:32:19,057 INFO L480 AbstractCegarLoop]: Abstraction has 210 states and 601 transitions. [2021-03-10 22:32:19,057 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) [2021-03-10 22:32:19,057 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 601 transitions. [2021-03-10 22:32:19,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:32:19,058 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:32:19,058 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:32:19,274 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:32:19,274 INFO L428 AbstractCegarLoop]: === Iteration 20 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-03-10 22:32:19,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:32:19,275 INFO L82 PathProgramCache]: Analyzing trace with hash -908838833, now seen corresponding path program 1 times [2021-03-10 22:32:19,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:32:19,275 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107284565] [2021-03-10 22:32:19,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:32:19,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:32:19,337 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:19,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107284565] [2021-03-10 22:32:19,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484066892] [2021-03-10 22:32:19,337 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 [2021-03-10 22:32:19,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:32:19,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:32:19,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:32:19,449 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 [2021-03-10 22:32:19,450 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:32:19,454 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:32:19,454 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:32:19,454 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:10 [2021-03-10 22:32:19,477 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:19,477 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:32:19,477 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-03-10 22:32:19,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757290201] [2021-03-10 22:32:19,478 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:32:19,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:32:19,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:32:19,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:32:19,479 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) [2021-03-10 22:32:19,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:32:19,815 INFO L93 Difference]: Finished difference Result 423 states and 1216 transitions. [2021-03-10 22:32:19,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 22:32:19,815 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 [2021-03-10 22:32:19,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:32:19,817 INFO L225 Difference]: With dead ends: 423 [2021-03-10 22:32:19,817 INFO L226 Difference]: Without dead ends: 414 [2021-03-10 22:32:19,817 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 180.3ms TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:32:19,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-03-10 22:32:19,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 216. [2021-03-10 22:32:19,821 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) [2021-03-10 22:32:19,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 621 transitions. [2021-03-10 22:32:19,821 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 621 transitions. Word has length 20 [2021-03-10 22:32:19,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:32:19,821 INFO L480 AbstractCegarLoop]: Abstraction has 216 states and 621 transitions. [2021-03-10 22:32:19,821 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) [2021-03-10 22:32:19,821 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 621 transitions. [2021-03-10 22:32:19,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:32:19,822 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:32:19,822 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:32:20,027 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-03-10 22:32:20,027 INFO L428 AbstractCegarLoop]: === Iteration 21 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-03-10 22:32:20,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:32:20,028 INFO L82 PathProgramCache]: Analyzing trace with hash -1199871497, now seen corresponding path program 2 times [2021-03-10 22:32:20,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:32:20,028 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507636775] [2021-03-10 22:32:20,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:32:20,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:32:20,094 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:20,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507636775] [2021-03-10 22:32:20,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480816696] [2021-03-10 22:32:20,094 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 [2021-03-10 22:32:20,114 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:32:20,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:32:20,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:32:20,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:32:20,255 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:32:20,255 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 [2021-03-10 22:32:20,258 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-10 22:32:20,269 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:32:20,272 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:32:20,272 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:35 [2021-03-10 22:32:20,352 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:20,353 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:32:20,353 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:32:20,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848296071] [2021-03-10 22:32:20,353 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:32:20,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:32:20,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:32:20,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:32:20,354 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) [2021-03-10 22:32:20,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:32:20,913 INFO L93 Difference]: Finished difference Result 360 states and 1047 transitions. [2021-03-10 22:32:20,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 22:32:20,913 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 [2021-03-10 22:32:20,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:32:20,914 INFO L225 Difference]: With dead ends: 360 [2021-03-10 22:32:20,914 INFO L226 Difference]: Without dead ends: 351 [2021-03-10 22:32:20,915 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 393.1ms TimeCoverageRelationStatistics Valid=119, Invalid=531, Unknown=0, NotChecked=0, Total=650 [2021-03-10 22:32:20,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2021-03-10 22:32:20,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 219. [2021-03-10 22:32:20,918 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) [2021-03-10 22:32:20,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 631 transitions. [2021-03-10 22:32:20,919 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 631 transitions. Word has length 20 [2021-03-10 22:32:20,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:32:20,919 INFO L480 AbstractCegarLoop]: Abstraction has 219 states and 631 transitions. [2021-03-10 22:32:20,919 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) [2021-03-10 22:32:20,919 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 631 transitions. [2021-03-10 22:32:20,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:32:20,920 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:32:20,920 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:32:21,127 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:32:21,127 INFO L428 AbstractCegarLoop]: === Iteration 22 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-03-10 22:32:21,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:32:21,128 INFO L82 PathProgramCache]: Analyzing trace with hash 2066945939, now seen corresponding path program 3 times [2021-03-10 22:32:21,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:32:21,128 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113908661] [2021-03-10 22:32:21,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:32:21,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:32:21,183 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:21,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113908661] [2021-03-10 22:32:21,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966686907] [2021-03-10 22:32:21,183 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 [2021-03-10 22:32:21,203 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 22:32:21,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:32:21,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:32:21,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:32:21,300 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:32:21,300 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 [2021-03-10 22:32:21,301 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-10 22:32:21,314 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:32:21,316 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:32:21,316 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:38 [2021-03-10 22:32:21,434 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:21,434 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:32:21,434 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-03-10 22:32:21,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400754094] [2021-03-10 22:32:21,435 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:32:21,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:32:21,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:32:21,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:32:21,435 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) [2021-03-10 22:32:21,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:32:21,931 INFO L93 Difference]: Finished difference Result 343 states and 998 transitions. [2021-03-10 22:32:21,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 22:32:21,932 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 [2021-03-10 22:32:21,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:32:21,933 INFO L225 Difference]: With dead ends: 343 [2021-03-10 22:32:21,933 INFO L226 Difference]: Without dead ends: 334 [2021-03-10 22:32:21,933 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 371.3ms TimeCoverageRelationStatistics Valid=116, Invalid=436, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:32:21,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2021-03-10 22:32:21,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 222. [2021-03-10 22:32:21,937 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) [2021-03-10 22:32:21,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 641 transitions. [2021-03-10 22:32:21,937 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 641 transitions. Word has length 20 [2021-03-10 22:32:21,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:32:21,937 INFO L480 AbstractCegarLoop]: Abstraction has 222 states and 641 transitions. [2021-03-10 22:32:21,937 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) [2021-03-10 22:32:21,937 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 641 transitions. [2021-03-10 22:32:21,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:32:21,938 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:32:21,938 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:32:22,146 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-03-10 22:32:22,146 INFO L428 AbstractCegarLoop]: === Iteration 23 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-03-10 22:32:22,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:32:22,146 INFO L82 PathProgramCache]: Analyzing trace with hash -1904435179, now seen corresponding path program 4 times [2021-03-10 22:32:22,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:32:22,147 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582522559] [2021-03-10 22:32:22,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:32:22,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:32:22,206 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:22,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582522559] [2021-03-10 22:32:22,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79603043] [2021-03-10 22:32:22,206 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 [2021-03-10 22:32:22,227 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:32:22,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:32:22,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:32:22,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:32:22,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:32:22,310 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 [2021-03-10 22:32:22,311 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:32:22,317 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:32:22,318 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:32:22,318 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-03-10 22:32:22,362 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:22,362 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:32:22,362 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-03-10 22:32:22,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077333284] [2021-03-10 22:32:22,363 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:32:22,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:32:22,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:32:22,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:32:22,363 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) [2021-03-10 22:32:22,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:32:22,600 INFO L93 Difference]: Finished difference Result 318 states and 927 transitions. [2021-03-10 22:32:22,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:32:22,601 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 [2021-03-10 22:32:22,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:32:22,602 INFO L225 Difference]: With dead ends: 318 [2021-03-10 22:32:22,602 INFO L226 Difference]: Without dead ends: 307 [2021-03-10 22:32:22,603 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 183.8ms TimeCoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:32:22,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2021-03-10 22:32:22,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 224. [2021-03-10 22:32:22,610 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) [2021-03-10 22:32:22,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 648 transitions. [2021-03-10 22:32:22,610 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 648 transitions. Word has length 20 [2021-03-10 22:32:22,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:32:22,610 INFO L480 AbstractCegarLoop]: Abstraction has 224 states and 648 transitions. [2021-03-10 22:32:22,611 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) [2021-03-10 22:32:22,611 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 648 transitions. [2021-03-10 22:32:22,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:32:22,611 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:32:22,611 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:32:22,826 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-03-10 22:32:22,826 INFO L428 AbstractCegarLoop]: === Iteration 24 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-03-10 22:32:22,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:32:22,826 INFO L82 PathProgramCache]: Analyzing trace with hash -453703043, now seen corresponding path program 5 times [2021-03-10 22:32:22,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:32:22,826 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276946249] [2021-03-10 22:32:22,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:32:22,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:32:22,912 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:22,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276946249] [2021-03-10 22:32:22,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920550287] [2021-03-10 22:32:22,913 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) [2021-03-10 22:32:22,940 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:32:22,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:32:22,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:32:22,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:32:23,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:32:23,040 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 [2021-03-10 22:32:23,041 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:32:23,046 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:32:23,047 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:32:23,047 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-03-10 22:32:23,079 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:23,079 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:32:23,079 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-03-10 22:32:23,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910576311] [2021-03-10 22:32:23,080 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:32:23,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:32:23,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:32:23,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:32:23,080 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) [2021-03-10 22:32:23,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:32:23,287 INFO L93 Difference]: Finished difference Result 328 states and 946 transitions. [2021-03-10 22:32:23,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:32:23,295 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 [2021-03-10 22:32:23,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:32:23,296 INFO L225 Difference]: With dead ends: 328 [2021-03-10 22:32:23,296 INFO L226 Difference]: Without dead ends: 318 [2021-03-10 22:32:23,296 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 169.8ms TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:32:23,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2021-03-10 22:32:23,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 224. [2021-03-10 22:32:23,308 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) [2021-03-10 22:32:23,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 648 transitions. [2021-03-10 22:32:23,309 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 648 transitions. Word has length 20 [2021-03-10 22:32:23,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:32:23,309 INFO L480 AbstractCegarLoop]: Abstraction has 224 states and 648 transitions. [2021-03-10 22:32:23,309 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) [2021-03-10 22:32:23,309 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 648 transitions. [2021-03-10 22:32:23,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:32:23,309 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:32:23,310 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:32:23,523 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:32:23,523 INFO L428 AbstractCegarLoop]: === Iteration 25 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-03-10 22:32:23,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:32:23,523 INFO L82 PathProgramCache]: Analyzing trace with hash -236278157, now seen corresponding path program 6 times [2021-03-10 22:32:23,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:32:23,523 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224795510] [2021-03-10 22:32:23,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:32:23,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:32:23,606 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:23,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224795510] [2021-03-10 22:32:23,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223433046] [2021-03-10 22:32:23,606 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 [2021-03-10 22:32:23,628 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 22:32:23,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:32:23,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:32:23,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:32:23,702 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:32:23,702 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 [2021-03-10 22:32:23,703 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-10 22:32:23,712 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:32:23,714 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:32:23,714 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-03-10 22:32:23,817 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:23,817 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:32:23,817 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-03-10 22:32:23,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552400669] [2021-03-10 22:32:23,818 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:32:23,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:32:23,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:32:23,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:32:23,818 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) [2021-03-10 22:32:24,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:32:24,565 INFO L93 Difference]: Finished difference Result 462 states and 1347 transitions. [2021-03-10 22:32:24,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-03-10 22:32:24,565 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 [2021-03-10 22:32:24,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:32:24,566 INFO L225 Difference]: With dead ends: 462 [2021-03-10 22:32:24,566 INFO L226 Difference]: Without dead ends: 442 [2021-03-10 22:32:24,567 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 599.1ms TimeCoverageRelationStatistics Valid=231, Invalid=959, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 22:32:24,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2021-03-10 22:32:24,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 235. [2021-03-10 22:32:24,571 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) [2021-03-10 22:32:24,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 694 transitions. [2021-03-10 22:32:24,572 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 694 transitions. Word has length 20 [2021-03-10 22:32:24,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:32:24,572 INFO L480 AbstractCegarLoop]: Abstraction has 235 states and 694 transitions. [2021-03-10 22:32:24,572 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) [2021-03-10 22:32:24,572 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 694 transitions. [2021-03-10 22:32:24,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:32:24,572 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:32:24,572 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:32:24,787 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-03-10 22:32:24,787 INFO L428 AbstractCegarLoop]: === Iteration 26 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-03-10 22:32:24,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:32:24,787 INFO L82 PathProgramCache]: Analyzing trace with hash 188465799, now seen corresponding path program 5 times [2021-03-10 22:32:24,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:32:24,787 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573576424] [2021-03-10 22:32:24,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:32:24,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:32:24,859 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:24,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573576424] [2021-03-10 22:32:24,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985751844] [2021-03-10 22:32:24,860 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 [2021-03-10 22:32:24,902 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:32:24,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:32:24,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:32:24,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:32:25,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:32:25,026 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 [2021-03-10 22:32:25,028 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:32:25,033 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:32:25,035 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:32:25,035 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-03-10 22:32:25,059 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:25,059 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:32:25,059 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-03-10 22:32:25,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700089577] [2021-03-10 22:32:25,059 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:32:25,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:32:25,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:32:25,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:32:25,060 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) [2021-03-10 22:32:25,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:32:25,269 INFO L93 Difference]: Finished difference Result 327 states and 955 transitions. [2021-03-10 22:32:25,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:32:25,269 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 [2021-03-10 22:32:25,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:32:25,270 INFO L225 Difference]: With dead ends: 327 [2021-03-10 22:32:25,270 INFO L226 Difference]: Without dead ends: 318 [2021-03-10 22:32:25,271 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 147.4ms TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:32:25,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2021-03-10 22:32:25,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 238. [2021-03-10 22:32:25,274 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) [2021-03-10 22:32:25,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 704 transitions. [2021-03-10 22:32:25,275 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 704 transitions. Word has length 20 [2021-03-10 22:32:25,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:32:25,275 INFO L480 AbstractCegarLoop]: Abstraction has 238 states and 704 transitions. [2021-03-10 22:32:25,275 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) [2021-03-10 22:32:25,275 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 704 transitions. [2021-03-10 22:32:25,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:32:25,276 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:32:25,276 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:32:25,483 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:32:25,483 INFO L428 AbstractCegarLoop]: === Iteration 27 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-03-10 22:32:25,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:32:25,483 INFO L82 PathProgramCache]: Analyzing trace with hash -839684061, now seen corresponding path program 6 times [2021-03-10 22:32:25,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:32:25,483 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062411803] [2021-03-10 22:32:25,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:32:25,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:32:25,538 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:25,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062411803] [2021-03-10 22:32:25,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894923399] [2021-03-10 22:32:25,539 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 [2021-03-10 22:32:25,558 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 22:32:25,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:32:25,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:32:25,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:32:25,628 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:32:25,629 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 [2021-03-10 22:32:25,629 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-10 22:32:25,640 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:32:25,644 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:32:25,644 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:38 [2021-03-10 22:32:25,738 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:25,738 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:32:25,738 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-03-10 22:32:25,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672291406] [2021-03-10 22:32:25,739 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:32:25,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:32:25,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:32:25,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:32:25,739 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) [2021-03-10 22:32:26,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:32:26,205 INFO L93 Difference]: Finished difference Result 341 states and 1001 transitions. [2021-03-10 22:32:26,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 22:32:26,205 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 [2021-03-10 22:32:26,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:32:26,207 INFO L225 Difference]: With dead ends: 341 [2021-03-10 22:32:26,207 INFO L226 Difference]: Without dead ends: 332 [2021-03-10 22:32:26,207 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 432.3ms TimeCoverageRelationStatistics Valid=107, Invalid=399, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:32:26,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2021-03-10 22:32:26,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 241. [2021-03-10 22:32:26,211 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) [2021-03-10 22:32:26,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 714 transitions. [2021-03-10 22:32:26,211 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 714 transitions. Word has length 20 [2021-03-10 22:32:26,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:32:26,211 INFO L480 AbstractCegarLoop]: Abstraction has 241 states and 714 transitions. [2021-03-10 22:32:26,211 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) [2021-03-10 22:32:26,211 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 714 transitions. [2021-03-10 22:32:26,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:32:26,212 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:32:26,212 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:32:26,417 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-03-10 22:32:26,421 INFO L428 AbstractCegarLoop]: === Iteration 28 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-03-10 22:32:26,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:32:26,421 INFO L82 PathProgramCache]: Analyzing trace with hash -516097883, now seen corresponding path program 7 times [2021-03-10 22:32:26,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:32:26,421 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918225286] [2021-03-10 22:32:26,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:32:26,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:32:26,496 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:26,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918225286] [2021-03-10 22:32:26,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8559637] [2021-03-10 22:32:26,497 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 [2021-03-10 22:32:26,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:32:26,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:32:26,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:32:26,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:32:26,572 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 [2021-03-10 22:32:26,573 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:32:26,579 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:32:26,580 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:32:26,580 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-03-10 22:32:26,619 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:26,620 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:32:26,620 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-03-10 22:32:26,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944571736] [2021-03-10 22:32:26,620 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:32:26,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:32:26,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:32:26,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:32:26,620 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) [2021-03-10 22:32:26,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:32:26,792 INFO L93 Difference]: Finished difference Result 310 states and 911 transitions. [2021-03-10 22:32:26,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:32:26,792 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 [2021-03-10 22:32:26,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:32:26,793 INFO L225 Difference]: With dead ends: 310 [2021-03-10 22:32:26,793 INFO L226 Difference]: Without dead ends: 299 [2021-03-10 22:32:26,793 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 144.9ms TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:32:26,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2021-03-10 22:32:26,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 235. [2021-03-10 22:32:26,797 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) [2021-03-10 22:32:26,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 694 transitions. [2021-03-10 22:32:26,797 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 694 transitions. Word has length 20 [2021-03-10 22:32:26,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:32:26,797 INFO L480 AbstractCegarLoop]: Abstraction has 235 states and 694 transitions. [2021-03-10 22:32:26,797 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) [2021-03-10 22:32:26,797 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 694 transitions. [2021-03-10 22:32:26,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:32:26,798 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:32:26,798 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:32:26,998 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:32:26,998 INFO L428 AbstractCegarLoop]: === Iteration 29 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-03-10 22:32:26,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:32:26,999 INFO L82 PathProgramCache]: Analyzing trace with hash 1628624025, now seen corresponding path program 7 times [2021-03-10 22:32:26,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:32:26,999 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936480580] [2021-03-10 22:32:26,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:32:27,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:32:27,079 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:27,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936480580] [2021-03-10 22:32:27,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486174259] [2021-03-10 22:32:27,080 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 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 [2021-03-10 22:32:27,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:32:27,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:32:27,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:32:27,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:32:27,163 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 [2021-03-10 22:32:27,164 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:32:27,170 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:32:27,171 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:32:27,171 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-03-10 22:32:27,212 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:27,212 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:32:27,213 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-03-10 22:32:27,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185385128] [2021-03-10 22:32:27,213 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:32:27,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:32:27,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:32:27,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:32:27,213 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) [2021-03-10 22:32:27,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:32:27,433 INFO L93 Difference]: Finished difference Result 350 states and 1025 transitions. [2021-03-10 22:32:27,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:32:27,433 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 [2021-03-10 22:32:27,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:32:27,434 INFO L225 Difference]: With dead ends: 350 [2021-03-10 22:32:27,434 INFO L226 Difference]: Without dead ends: 340 [2021-03-10 22:32:27,434 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 173.0ms TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:32:27,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2021-03-10 22:32:27,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 246. [2021-03-10 22:32:27,438 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) [2021-03-10 22:32:27,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 738 transitions. [2021-03-10 22:32:27,438 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 738 transitions. Word has length 20 [2021-03-10 22:32:27,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:32:27,439 INFO L480 AbstractCegarLoop]: Abstraction has 246 states and 738 transitions. [2021-03-10 22:32:27,439 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) [2021-03-10 22:32:27,439 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 738 transitions. [2021-03-10 22:32:27,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:32:27,439 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:32:27,439 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:32:27,654 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-03-10 22:32:27,654 INFO L428 AbstractCegarLoop]: === Iteration 30 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-03-10 22:32:27,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:32:27,654 INFO L82 PathProgramCache]: Analyzing trace with hash -162237149, now seen corresponding path program 8 times [2021-03-10 22:32:27,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:32:27,654 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177619169] [2021-03-10 22:32:27,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:32:27,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:32:27,734 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:27,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177619169] [2021-03-10 22:32:27,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348813521] [2021-03-10 22:32:27,735 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 [2021-03-10 22:32:27,760 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:32:27,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:32:27,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 22:32:27,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:32:27,809 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:32:27,810 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 [2021-03-10 22:32:27,811 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-10 22:32:27,821 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:32:27,824 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:32:27,824 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:26 [2021-03-10 22:32:27,894 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:27,894 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:32:27,895 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-03-10 22:32:27,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400524297] [2021-03-10 22:32:27,895 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:32:27,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:32:27,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:32:27,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:32:27,895 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) [2021-03-10 22:32:28,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:32:28,181 INFO L93 Difference]: Finished difference Result 404 states and 1198 transitions. [2021-03-10 22:32:28,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 22:32:28,181 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 [2021-03-10 22:32:28,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:32:28,182 INFO L225 Difference]: With dead ends: 404 [2021-03-10 22:32:28,182 INFO L226 Difference]: Without dead ends: 382 [2021-03-10 22:32:28,183 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 249.9ms TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:32:28,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2021-03-10 22:32:28,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 256. [2021-03-10 22:32:28,186 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) [2021-03-10 22:32:28,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 781 transitions. [2021-03-10 22:32:28,187 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 781 transitions. Word has length 20 [2021-03-10 22:32:28,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:32:28,187 INFO L480 AbstractCegarLoop]: Abstraction has 256 states and 781 transitions. [2021-03-10 22:32:28,187 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) [2021-03-10 22:32:28,187 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 781 transitions. [2021-03-10 22:32:28,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:32:28,188 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:32:28,188 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:32:28,399 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-03-10 22:32:28,399 INFO L428 AbstractCegarLoop]: === Iteration 31 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-03-10 22:32:28,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:32:28,399 INFO L82 PathProgramCache]: Analyzing trace with hash -428870833, now seen corresponding path program 8 times [2021-03-10 22:32:28,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:32:28,399 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155922683] [2021-03-10 22:32:28,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:32:28,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:32:28,462 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:28,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155922683] [2021-03-10 22:32:28,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102495951] [2021-03-10 22:32:28,463 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 [2021-03-10 22:32:28,482 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:32:28,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:32:28,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 22:32:28,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:32:28,549 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:32:28,549 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 [2021-03-10 22:32:28,550 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-10 22:32:28,563 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:32:28,566 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:32:28,566 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:26 [2021-03-10 22:32:28,642 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:28,642 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:32:28,642 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-03-10 22:32:28,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632665704] [2021-03-10 22:32:28,642 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:32:28,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:32:28,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:32:28,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:32:28,643 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) [2021-03-10 22:32:28,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:32:28,972 INFO L93 Difference]: Finished difference Result 350 states and 1049 transitions. [2021-03-10 22:32:28,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:32:28,972 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 [2021-03-10 22:32:28,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:32:28,973 INFO L225 Difference]: With dead ends: 350 [2021-03-10 22:32:28,973 INFO L226 Difference]: Without dead ends: 341 [2021-03-10 22:32:28,974 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 315.5ms TimeCoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:32:28,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2021-03-10 22:32:28,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 259. [2021-03-10 22:32:28,977 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) [2021-03-10 22:32:28,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 791 transitions. [2021-03-10 22:32:28,978 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 791 transitions. Word has length 20 [2021-03-10 22:32:28,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:32:28,978 INFO L480 AbstractCegarLoop]: Abstraction has 259 states and 791 transitions. [2021-03-10 22:32:28,978 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) [2021-03-10 22:32:28,978 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 791 transitions. [2021-03-10 22:32:28,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:32:28,978 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:32:28,979 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:32:29,194 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-03-10 22:32:29,194 INFO L428 AbstractCegarLoop]: === Iteration 32 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-03-10 22:32:29,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:32:29,195 INFO L82 PathProgramCache]: Analyzing trace with hash -105284655, now seen corresponding path program 9 times [2021-03-10 22:32:29,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:32:29,195 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521485354] [2021-03-10 22:32:29,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:32:29,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:32:29,273 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:29,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521485354] [2021-03-10 22:32:29,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045349795] [2021-03-10 22:32:29,273 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 [2021-03-10 22:32:29,295 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:32:29,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:32:29,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:32:29,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:32:29,363 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:32:29,363 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 [2021-03-10 22:32:29,364 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-10 22:32:29,374 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:32:29,374 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:32:29,374 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-03-10 22:32:29,492 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:29,493 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:32:29,493 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-03-10 22:32:29,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420098014] [2021-03-10 22:32:29,493 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:32:29,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:32:29,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:32:29,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:32:29,494 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) [2021-03-10 22:32:30,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:32:30,149 INFO L93 Difference]: Finished difference Result 353 states and 1060 transitions. [2021-03-10 22:32:30,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 22:32:30,150 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 [2021-03-10 22:32:30,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:32:30,151 INFO L225 Difference]: With dead ends: 353 [2021-03-10 22:32:30,151 INFO L226 Difference]: Without dead ends: 340 [2021-03-10 22:32:30,151 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 509.5ms TimeCoverageRelationStatistics Valid=143, Invalid=613, Unknown=0, NotChecked=0, Total=756 [2021-03-10 22:32:30,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2021-03-10 22:32:30,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 256. [2021-03-10 22:32:30,155 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) [2021-03-10 22:32:30,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 781 transitions. [2021-03-10 22:32:30,155 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 781 transitions. Word has length 20 [2021-03-10 22:32:30,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:32:30,155 INFO L480 AbstractCegarLoop]: Abstraction has 256 states and 781 transitions. [2021-03-10 22:32:30,156 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) [2021-03-10 22:32:30,156 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 781 transitions. [2021-03-10 22:32:30,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:32:30,156 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:32:30,156 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:32:30,373 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-03-10 22:32:30,373 INFO L428 AbstractCegarLoop]: === Iteration 33 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-03-10 22:32:30,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:32:30,373 INFO L82 PathProgramCache]: Analyzing trace with hash 431638013, now seen corresponding path program 9 times [2021-03-10 22:32:30,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:32:30,373 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841630150] [2021-03-10 22:32:30,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:32:30,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:32:30,449 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:30,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841630150] [2021-03-10 22:32:30,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953109867] [2021-03-10 22:32:30,449 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 [2021-03-10 22:32:30,471 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:32:30,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:32:30,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:32:30,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:32:30,538 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:32:30,538 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 [2021-03-10 22:32:30,539 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-10 22:32:30,547 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:32:30,548 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:32:30,548 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:23 [2021-03-10 22:32:30,637 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:30,637 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:32:30,637 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-03-10 22:32:30,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645622039] [2021-03-10 22:32:30,637 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:32:30,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:32:30,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:32:30,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:32:30,638 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) [2021-03-10 22:32:31,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:32:31,489 INFO L93 Difference]: Finished difference Result 485 states and 1380 transitions. [2021-03-10 22:32:31,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 22:32:31,490 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 [2021-03-10 22:32:31,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:32:31,491 INFO L225 Difference]: With dead ends: 485 [2021-03-10 22:32:31,491 INFO L226 Difference]: Without dead ends: 458 [2021-03-10 22:32:31,491 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 616.7ms TimeCoverageRelationStatistics Valid=162, Invalid=830, Unknown=0, NotChecked=0, Total=992 [2021-03-10 22:32:31,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2021-03-10 22:32:31,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 293. [2021-03-10 22:32:31,496 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) [2021-03-10 22:32:31,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 904 transitions. [2021-03-10 22:32:31,496 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 904 transitions. Word has length 20 [2021-03-10 22:32:31,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:32:31,497 INFO L480 AbstractCegarLoop]: Abstraction has 293 states and 904 transitions. [2021-03-10 22:32:31,497 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) [2021-03-10 22:32:31,497 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 904 transitions. [2021-03-10 22:32:31,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:32:31,497 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:32:31,497 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:32:31,703 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-03-10 22:32:31,703 INFO L428 AbstractCegarLoop]: === Iteration 34 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-03-10 22:32:31,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:32:31,703 INFO L82 PathProgramCache]: Analyzing trace with hash 226719879, now seen corresponding path program 10 times [2021-03-10 22:32:31,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:32:31,703 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258184503] [2021-03-10 22:32:31,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:32:31,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:32:31,782 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:31,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258184503] [2021-03-10 22:32:31,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793779551] [2021-03-10 22:32:31,782 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 [2021-03-10 22:32:31,802 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:32:31,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:32:31,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:32:31,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:32:31,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:32:31,863 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 [2021-03-10 22:32:31,864 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:32:31,869 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:32:31,870 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:32:31,870 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:10 [2021-03-10 22:32:31,898 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:31,898 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:32:31,898 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-03-10 22:32:31,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072609291] [2021-03-10 22:32:31,899 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:32:31,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:32:31,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:32:31,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:32:31,899 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) [2021-03-10 22:32:32,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:32:32,051 INFO L93 Difference]: Finished difference Result 371 states and 1128 transitions. [2021-03-10 22:32:32,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 22:32:32,051 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 [2021-03-10 22:32:32,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:32:32,052 INFO L225 Difference]: With dead ends: 371 [2021-03-10 22:32:32,052 INFO L226 Difference]: Without dead ends: 360 [2021-03-10 22:32:32,052 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 152.5ms TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:32:32,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2021-03-10 22:32:32,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 295. [2021-03-10 22:32:32,056 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) [2021-03-10 22:32:32,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 908 transitions. [2021-03-10 22:32:32,057 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 908 transitions. Word has length 20 [2021-03-10 22:32:32,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:32:32,057 INFO L480 AbstractCegarLoop]: Abstraction has 295 states and 908 transitions. [2021-03-10 22:32:32,057 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) [2021-03-10 22:32:32,057 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 908 transitions. [2021-03-10 22:32:32,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:32:32,058 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:32:32,058 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:32:32,272 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:32:32,272 INFO L428 AbstractCegarLoop]: === Iteration 35 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-03-10 22:32:32,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:32:32,272 INFO L82 PathProgramCache]: Analyzing trace with hash 2027400643, now seen corresponding path program 10 times [2021-03-10 22:32:32,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:32:32,272 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972363018] [2021-03-10 22:32:32,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:32:32,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:32:32,332 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:32,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972363018] [2021-03-10 22:32:32,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972761939] [2021-03-10 22:32:32,332 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 [2021-03-10 22:32:32,351 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:32:32,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:32:32,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:32:32,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:32:32,427 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:32:32,428 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:32:32,428 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:32:32,434 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:32:32,440 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:32:32,440 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:10 [2021-03-10 22:32:32,462 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:32,462 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:32:32,462 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-03-10 22:32:32,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399460114] [2021-03-10 22:32:32,463 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:32:32,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:32:32,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:32:32,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:32:32,463 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) [2021-03-10 22:32:32,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:32:32,644 INFO L93 Difference]: Finished difference Result 412 states and 1240 transitions. [2021-03-10 22:32:32,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:32:32,644 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 [2021-03-10 22:32:32,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:32:32,646 INFO L225 Difference]: With dead ends: 412 [2021-03-10 22:32:32,646 INFO L226 Difference]: Without dead ends: 402 [2021-03-10 22:32:32,646 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 153.6ms TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:32:32,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2021-03-10 22:32:32,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 298. [2021-03-10 22:32:32,650 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) [2021-03-10 22:32:32,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 917 transitions. [2021-03-10 22:32:32,650 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 917 transitions. Word has length 20 [2021-03-10 22:32:32,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:32:32,650 INFO L480 AbstractCegarLoop]: Abstraction has 298 states and 917 transitions. [2021-03-10 22:32:32,650 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) [2021-03-10 22:32:32,651 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 917 transitions. [2021-03-10 22:32:32,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:32:32,651 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:32:32,651 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:32:32,865 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:32:32,866 INFO L428 AbstractCegarLoop]: === Iteration 36 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-03-10 22:32:32,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:32:32,866 INFO L82 PathProgramCache]: Analyzing trace with hash -1645911141, now seen corresponding path program 11 times [2021-03-10 22:32:32,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:32:32,866 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835016905] [2021-03-10 22:32:32,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:32:32,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:32:32,951 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:32,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835016905] [2021-03-10 22:32:32,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53217697] [2021-03-10 22:32:32,952 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 [2021-03-10 22:32:32,971 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:32:32,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:32:32,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:32:32,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:32:33,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:32:33,039 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 [2021-03-10 22:32:33,039 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:32:33,046 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:32:33,047 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:32:33,047 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:28, output treesize:10 [2021-03-10 22:32:33,096 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:33,097 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:32:33,097 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:32:33,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44793286] [2021-03-10 22:32:33,097 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:32:33,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:32:33,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:32:33,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:32:33,097 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) [2021-03-10 22:32:33,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:32:33,516 INFO L93 Difference]: Finished difference Result 460 states and 1382 transitions. [2021-03-10 22:32:33,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 22:32:33,516 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 [2021-03-10 22:32:33,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:32:33,517 INFO L225 Difference]: With dead ends: 460 [2021-03-10 22:32:33,518 INFO L226 Difference]: Without dead ends: 450 [2021-03-10 22:32:33,518 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 338.0ms TimeCoverageRelationStatistics Valid=132, Invalid=518, Unknown=0, NotChecked=0, Total=650 [2021-03-10 22:32:33,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2021-03-10 22:32:33,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 298. [2021-03-10 22:32:33,522 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) [2021-03-10 22:32:33,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 917 transitions. [2021-03-10 22:32:33,523 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 917 transitions. Word has length 20 [2021-03-10 22:32:33,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:32:33,523 INFO L480 AbstractCegarLoop]: Abstraction has 298 states and 917 transitions. [2021-03-10 22:32:33,523 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) [2021-03-10 22:32:33,523 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 917 transitions. [2021-03-10 22:32:33,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:32:33,524 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:32:33,524 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:32:33,738 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:32:33,738 INFO L428 AbstractCegarLoop]: === Iteration 37 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-03-10 22:32:33,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:32:33,738 INFO L82 PathProgramCache]: Analyzing trace with hash 1815317715, now seen corresponding path program 12 times [2021-03-10 22:32:33,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:32:33,738 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320915019] [2021-03-10 22:32:33,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:32:33,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:32:33,843 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:32:33,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320915019] [2021-03-10 22:32:33,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972765063] [2021-03-10 22:32:33,843 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 [2021-03-10 22:32:33,865 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 22:32:33,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:32:33,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:32:33,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:32:33,916 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:32:33,917 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 [2021-03-10 22:32:33,917 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-10 22:32:33,926 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:32:33,927 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:32:33,927 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-03-10 22:32:34,026 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:34,026 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:32:34,026 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-03-10 22:32:34,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783286767] [2021-03-10 22:32:34,026 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:32:34,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:32:34,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:32:34,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:32:34,027 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) [2021-03-10 22:32:34,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:32:34,715 INFO L93 Difference]: Finished difference Result 552 states and 1617 transitions. [2021-03-10 22:32:34,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-10 22:32:34,715 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 [2021-03-10 22:32:34,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:32:34,717 INFO L225 Difference]: With dead ends: 552 [2021-03-10 22:32:34,717 INFO L226 Difference]: Without dead ends: 520 [2021-03-10 22:32:34,717 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 574.1ms TimeCoverageRelationStatistics Valid=215, Invalid=777, Unknown=0, NotChecked=0, Total=992 [2021-03-10 22:32:34,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2021-03-10 22:32:34,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 306. [2021-03-10 22:32:34,721 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) [2021-03-10 22:32:34,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 951 transitions. [2021-03-10 22:32:34,722 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 951 transitions. Word has length 20 [2021-03-10 22:32:34,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:32:34,722 INFO L480 AbstractCegarLoop]: Abstraction has 306 states and 951 transitions. [2021-03-10 22:32:34,722 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) [2021-03-10 22:32:34,722 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 951 transitions. [2021-03-10 22:32:34,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:32:34,723 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:32:34,723 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:32:34,923 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-03-10 22:32:34,923 INFO L428 AbstractCegarLoop]: === Iteration 38 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-03-10 22:32:34,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:32:34,923 INFO L82 PathProgramCache]: Analyzing trace with hash -1895521031, now seen corresponding path program 11 times [2021-03-10 22:32:34,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:32:34,924 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141862472] [2021-03-10 22:32:34,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:32:34,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:32:34,987 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:34,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141862472] [2021-03-10 22:32:34,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27606573] [2021-03-10 22:32:34,988 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 [2021-03-10 22:32:35,008 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:32:35,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:32:35,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:32:35,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:32:35,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:32:35,082 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 [2021-03-10 22:32:35,082 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:32:35,087 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:32:35,088 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:32:35,088 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:10 [2021-03-10 22:32:35,110 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:35,110 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:32:35,111 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-03-10 22:32:35,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268095264] [2021-03-10 22:32:35,111 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:32:35,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:32:35,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:32:35,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:32:35,111 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) [2021-03-10 22:32:35,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:32:35,290 INFO L93 Difference]: Finished difference Result 408 states and 1237 transitions. [2021-03-10 22:32:35,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:32:35,290 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 [2021-03-10 22:32:35,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:32:35,292 INFO L225 Difference]: With dead ends: 408 [2021-03-10 22:32:35,292 INFO L226 Difference]: Without dead ends: 399 [2021-03-10 22:32:35,292 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 155.0ms TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:32:35,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2021-03-10 22:32:35,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 309. [2021-03-10 22:32:35,296 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) [2021-03-10 22:32:35,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 961 transitions. [2021-03-10 22:32:35,296 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 961 transitions. Word has length 20 [2021-03-10 22:32:35,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:32:35,297 INFO L480 AbstractCegarLoop]: Abstraction has 309 states and 961 transitions. [2021-03-10 22:32:35,297 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) [2021-03-10 22:32:35,297 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 961 transitions. [2021-03-10 22:32:35,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:32:35,297 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:32:35,297 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:32:35,511 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:32:35,511 INFO L428 AbstractCegarLoop]: === Iteration 39 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-03-10 22:32:35,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:32:35,511 INFO L82 PathProgramCache]: Analyzing trace with hash 1371296405, now seen corresponding path program 12 times [2021-03-10 22:32:35,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:32:35,512 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689874028] [2021-03-10 22:32:35,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:32:35,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:32:35,564 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:35,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689874028] [2021-03-10 22:32:35,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894732003] [2021-03-10 22:32:35,564 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 [2021-03-10 22:32:35,586 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 22:32:35,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:32:35,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:32:35,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:32:35,641 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:32:35,642 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 [2021-03-10 22:32:35,643 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-10 22:32:35,649 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:32:35,650 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:32:35,650 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:21 [2021-03-10 22:32:35,715 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:35,715 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:32:35,715 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-03-10 22:32:35,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503382700] [2021-03-10 22:32:35,715 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:32:35,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:32:35,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:32:35,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:32:35,716 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) [2021-03-10 22:32:36,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:32:36,024 INFO L93 Difference]: Finished difference Result 429 states and 1298 transitions. [2021-03-10 22:32:36,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:32:36,024 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 [2021-03-10 22:32:36,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:32:36,026 INFO L225 Difference]: With dead ends: 429 [2021-03-10 22:32:36,026 INFO L226 Difference]: Without dead ends: 420 [2021-03-10 22:32:36,026 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 299.2ms TimeCoverageRelationStatistics Valid=113, Invalid=393, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:32:36,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2021-03-10 22:32:36,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 312. [2021-03-10 22:32:36,030 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) [2021-03-10 22:32:36,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 971 transitions. [2021-03-10 22:32:36,030 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 971 transitions. Word has length 20 [2021-03-10 22:32:36,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:32:36,030 INFO L480 AbstractCegarLoop]: Abstraction has 312 states and 971 transitions. [2021-03-10 22:32:36,030 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) [2021-03-10 22:32:36,030 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 971 transitions. [2021-03-10 22:32:36,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:32:36,031 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:32:36,031 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:32:36,235 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-03-10 22:32:36,235 INFO L428 AbstractCegarLoop]: === Iteration 40 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-03-10 22:32:36,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:32:36,235 INFO L82 PathProgramCache]: Analyzing trace with hash 1694882583, now seen corresponding path program 13 times [2021-03-10 22:32:36,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:32:36,235 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277618598] [2021-03-10 22:32:36,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:32:36,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:32:36,290 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:36,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277618598] [2021-03-10 22:32:36,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204766041] [2021-03-10 22:32:36,290 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:32:36,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:32:36,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:32:36,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:32:36,371 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:32:36,371 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 [2021-03-10 22:32:36,372 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:32:36,378 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:32:36,379 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:32:36,379 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-03-10 22:32:36,430 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:36,430 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:32:36,430 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-03-10 22:32:36,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988912157] [2021-03-10 22:32:36,430 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:32:36,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:32:36,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:32:36,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:32:36,431 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) [2021-03-10 22:32:36,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:32:36,574 INFO L93 Difference]: Finished difference Result 391 states and 1193 transitions. [2021-03-10 22:32:36,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:32:36,575 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 [2021-03-10 22:32:36,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:32:36,576 INFO L225 Difference]: With dead ends: 391 [2021-03-10 22:32:36,576 INFO L226 Difference]: Without dead ends: 380 [2021-03-10 22:32:36,576 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 136.5ms TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:32:36,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2021-03-10 22:32:36,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 306. [2021-03-10 22:32:36,580 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) [2021-03-10 22:32:36,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 951 transitions. [2021-03-10 22:32:36,580 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 951 transitions. Word has length 20 [2021-03-10 22:32:36,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:32:36,580 INFO L480 AbstractCegarLoop]: Abstraction has 306 states and 951 transitions. [2021-03-10 22:32:36,580 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) [2021-03-10 22:32:36,580 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 951 transitions. [2021-03-10 22:32:36,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:32:36,581 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:32:36,581 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:32:36,795 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-03-10 22:32:36,795 INFO L428 AbstractCegarLoop]: === Iteration 41 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-03-10 22:32:36,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:32:36,796 INFO L82 PathProgramCache]: Analyzing trace with hash -455362805, now seen corresponding path program 13 times [2021-03-10 22:32:36,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:32:36,796 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713212410] [2021-03-10 22:32:36,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:32:36,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:32:36,878 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:36,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713212410] [2021-03-10 22:32:36,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251223509] [2021-03-10 22:32:36,879 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 [2021-03-10 22:32:36,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:32:36,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:32:36,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:32:36,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:32:36,948 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 [2021-03-10 22:32:36,949 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:32:36,955 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:32:36,956 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:32:36,956 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-03-10 22:32:36,997 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:36,997 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:32:36,998 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-03-10 22:32:36,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433662457] [2021-03-10 22:32:36,998 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:32:36,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:32:36,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:32:36,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:32:36,998 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) [2021-03-10 22:32:37,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:32:37,233 INFO L93 Difference]: Finished difference Result 431 states and 1307 transitions. [2021-03-10 22:32:37,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 22:32:37,233 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 [2021-03-10 22:32:37,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:32:37,234 INFO L225 Difference]: With dead ends: 431 [2021-03-10 22:32:37,234 INFO L226 Difference]: Without dead ends: 421 [2021-03-10 22:32:37,235 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 189.0ms TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:32:37,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2021-03-10 22:32:37,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 309. [2021-03-10 22:32:37,238 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) [2021-03-10 22:32:37,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 959 transitions. [2021-03-10 22:32:37,239 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 959 transitions. Word has length 20 [2021-03-10 22:32:37,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:32:37,239 INFO L480 AbstractCegarLoop]: Abstraction has 309 states and 959 transitions. [2021-03-10 22:32:37,239 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) [2021-03-10 22:32:37,239 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 959 transitions. [2021-03-10 22:32:37,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:32:37,240 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:32:37,240 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:32:37,454 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-03-10 22:32:37,454 INFO L428 AbstractCegarLoop]: === Iteration 42 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-03-10 22:32:37,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:32:37,454 INFO L82 PathProgramCache]: Analyzing trace with hash 2048743317, now seen corresponding path program 14 times [2021-03-10 22:32:37,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:32:37,454 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720301532] [2021-03-10 22:32:37,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:32:37,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:32:37,534 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:37,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720301532] [2021-03-10 22:32:37,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644438711] [2021-03-10 22:32:37,534 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) [2021-03-10 22:32:37,555 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:32:37,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:32:37,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 22:32:37,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:32:37,609 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:32:37,609 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 [2021-03-10 22:32:37,610 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-10 22:32:37,618 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:32:37,618 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:32:37,618 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:24 [2021-03-10 22:32:37,696 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:37,696 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:32:37,696 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-03-10 22:32:37,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884972236] [2021-03-10 22:32:37,697 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:32:37,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:32:37,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:32:37,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:32:37,697 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) [2021-03-10 22:32:38,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:32:38,058 INFO L93 Difference]: Finished difference Result 487 states and 1471 transitions. [2021-03-10 22:32:38,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 22:32:38,058 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 [2021-03-10 22:32:38,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:32:38,060 INFO L225 Difference]: With dead ends: 487 [2021-03-10 22:32:38,060 INFO L226 Difference]: Without dead ends: 465 [2021-03-10 22:32:38,060 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 301.4ms TimeCoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:32:38,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2021-03-10 22:32:38,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 309. [2021-03-10 22:32:38,064 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) [2021-03-10 22:32:38,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 959 transitions. [2021-03-10 22:32:38,064 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 959 transitions. Word has length 20 [2021-03-10 22:32:38,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:32:38,064 INFO L480 AbstractCegarLoop]: Abstraction has 309 states and 959 transitions. [2021-03-10 22:32:38,065 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) [2021-03-10 22:32:38,065 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 959 transitions. [2021-03-10 22:32:38,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:32:38,065 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:32:38,065 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:32:38,279 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:32:38,279 INFO L428 AbstractCegarLoop]: === Iteration 43 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-03-10 22:32:38,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:32:38,279 INFO L82 PathProgramCache]: Analyzing trace with hash 1782109633, now seen corresponding path program 14 times [2021-03-10 22:32:38,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:32:38,279 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574967351] [2021-03-10 22:32:38,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:32:38,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:32:38,354 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:38,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574967351] [2021-03-10 22:32:38,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444075440] [2021-03-10 22:32:38,355 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) [2021-03-10 22:32:38,378 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:32:38,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:32:38,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 22:32:38,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:32:38,432 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:32:38,433 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 [2021-03-10 22:32:38,433 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-10 22:32:38,441 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:32:38,442 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:32:38,442 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:24 [2021-03-10 22:32:38,519 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:38,519 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:32:38,519 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-03-10 22:32:38,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715783896] [2021-03-10 22:32:38,519 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:32:38,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:32:38,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:32:38,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:32:38,520 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) [2021-03-10 22:32:38,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:32:38,882 INFO L93 Difference]: Finished difference Result 428 states and 1295 transitions. [2021-03-10 22:32:38,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:32:38,882 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 [2021-03-10 22:32:38,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:32:38,884 INFO L225 Difference]: With dead ends: 428 [2021-03-10 22:32:38,884 INFO L226 Difference]: Without dead ends: 419 [2021-03-10 22:32:38,884 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 300.1ms TimeCoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:32:38,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2021-03-10 22:32:38,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 312. [2021-03-10 22:32:38,888 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) [2021-03-10 22:32:38,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 969 transitions. [2021-03-10 22:32:38,888 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 969 transitions. Word has length 20 [2021-03-10 22:32:38,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:32:38,888 INFO L480 AbstractCegarLoop]: Abstraction has 312 states and 969 transitions. [2021-03-10 22:32:38,888 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) [2021-03-10 22:32:38,888 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 969 transitions. [2021-03-10 22:32:38,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:32:38,889 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:32:38,889 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:32:39,089 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:32:39,090 INFO L428 AbstractCegarLoop]: === Iteration 44 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-03-10 22:32:39,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:32:39,090 INFO L82 PathProgramCache]: Analyzing trace with hash 2105695811, now seen corresponding path program 15 times [2021-03-10 22:32:39,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:32:39,090 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983613682] [2021-03-10 22:32:39,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:32:39,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:32:39,153 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:39,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983613682] [2021-03-10 22:32:39,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434307037] [2021-03-10 22:32:39,153 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 [2021-03-10 22:32:39,173 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:32:39,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:32:39,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:32:39,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:32:39,229 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:32:39,229 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 [2021-03-10 22:32:39,231 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-10 22:32:39,239 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:32:39,240 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:32:39,240 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-03-10 22:32:39,356 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:39,356 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:32:39,356 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-03-10 22:32:39,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521743733] [2021-03-10 22:32:39,357 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:32:39,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:32:39,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:32:39,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:32:39,357 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) [2021-03-10 22:32:40,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:32:40,196 INFO L93 Difference]: Finished difference Result 464 states and 1400 transitions. [2021-03-10 22:32:40,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 22:32:40,196 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 [2021-03-10 22:32:40,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:32:40,198 INFO L225 Difference]: With dead ends: 464 [2021-03-10 22:32:40,198 INFO L226 Difference]: Without dead ends: 451 [2021-03-10 22:32:40,198 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 698.9ms TimeCoverageRelationStatistics Valid=219, Invalid=971, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 22:32:40,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2021-03-10 22:32:40,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 309. [2021-03-10 22:32:40,202 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) [2021-03-10 22:32:40,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 959 transitions. [2021-03-10 22:32:40,203 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 959 transitions. Word has length 20 [2021-03-10 22:32:40,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:32:40,203 INFO L480 AbstractCegarLoop]: Abstraction has 309 states and 959 transitions. [2021-03-10 22:32:40,203 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) [2021-03-10 22:32:40,203 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 959 transitions. [2021-03-10 22:32:40,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:32:40,204 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:32:40,204 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:32:40,415 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-03-10 22:32:40,415 INFO L428 AbstractCegarLoop]: === Iteration 45 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-03-10 22:32:40,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:32:40,416 INFO L82 PathProgramCache]: Analyzing trace with hash -1652348817, now seen corresponding path program 15 times [2021-03-10 22:32:40,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:32:40,416 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054219803] [2021-03-10 22:32:40,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:32:40,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:32:40,485 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:40,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054219803] [2021-03-10 22:32:40,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25580202] [2021-03-10 22:32:40,486 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 [2021-03-10 22:32:40,520 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:32:40,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:32:40,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:32:40,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:32:40,585 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:32:40,585 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 [2021-03-10 22:32:40,598 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-10 22:32:40,606 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:32:40,606 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:32:40,607 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:23 [2021-03-10 22:32:40,697 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:40,697 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:32:40,697 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-03-10 22:32:40,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561390106] [2021-03-10 22:32:40,697 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:32:40,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:32:40,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:32:40,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:32:40,698 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) [2021-03-10 22:32:41,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:32:41,704 INFO L93 Difference]: Finished difference Result 598 states and 1728 transitions. [2021-03-10 22:32:41,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-03-10 22:32:41,705 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 [2021-03-10 22:32:41,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:32:41,706 INFO L225 Difference]: With dead ends: 598 [2021-03-10 22:32:41,707 INFO L226 Difference]: Without dead ends: 571 [2021-03-10 22:32:41,707 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 777.4ms TimeCoverageRelationStatistics Valid=223, Invalid=1259, Unknown=0, NotChecked=0, Total=1482 [2021-03-10 22:32:41,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-03-10 22:32:41,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 313. [2021-03-10 22:32:41,711 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) [2021-03-10 22:32:41,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 971 transitions. [2021-03-10 22:32:41,712 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 971 transitions. Word has length 20 [2021-03-10 22:32:41,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:32:41,712 INFO L480 AbstractCegarLoop]: Abstraction has 313 states and 971 transitions. [2021-03-10 22:32:41,712 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) [2021-03-10 22:32:41,712 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 971 transitions. [2021-03-10 22:32:41,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:32:41,712 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:32:41,712 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:32:41,926 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:32:41,926 INFO L428 AbstractCegarLoop]: === Iteration 46 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-03-10 22:32:41,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:32:41,927 INFO L82 PathProgramCache]: Analyzing trace with hash -1857266951, now seen corresponding path program 16 times [2021-03-10 22:32:41,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:32:41,927 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938141400] [2021-03-10 22:32:41,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:32:41,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:32:42,001 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:42,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938141400] [2021-03-10 22:32:42,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882995124] [2021-03-10 22:32:42,001 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 [2021-03-10 22:32:42,020 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:32:42,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:32:42,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:32:42,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:32:42,094 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:32:42,095 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 [2021-03-10 22:32:42,096 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:32:42,101 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:32:42,102 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:32:42,102 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-03-10 22:32:42,133 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:42,133 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:32:42,133 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-03-10 22:32:42,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345860533] [2021-03-10 22:32:42,133 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:32:42,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:32:42,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:32:42,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:32:42,133 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) [2021-03-10 22:32:42,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:32:42,331 INFO L93 Difference]: Finished difference Result 403 states and 1227 transitions. [2021-03-10 22:32:42,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:32:42,331 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 [2021-03-10 22:32:42,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:32:42,332 INFO L225 Difference]: With dead ends: 403 [2021-03-10 22:32:42,332 INFO L226 Difference]: Without dead ends: 392 [2021-03-10 22:32:42,332 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 168.7ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:32:42,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2021-03-10 22:32:42,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 306. [2021-03-10 22:32:42,342 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) [2021-03-10 22:32:42,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 951 transitions. [2021-03-10 22:32:42,342 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 951 transitions. Word has length 20 [2021-03-10 22:32:42,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:32:42,342 INFO L480 AbstractCegarLoop]: Abstraction has 306 states and 951 transitions. [2021-03-10 22:32:42,342 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) [2021-03-10 22:32:42,342 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 951 transitions. [2021-03-10 22:32:42,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:32:42,343 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:32:42,343 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:32:42,557 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2021-03-10 22:32:42,557 INFO L428 AbstractCegarLoop]: === Iteration 47 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-03-10 22:32:42,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:32:42,558 INFO L82 PathProgramCache]: Analyzing trace with hash -76255857, now seen corresponding path program 16 times [2021-03-10 22:32:42,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:32:42,558 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765534774] [2021-03-10 22:32:42,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:32:42,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:32:42,643 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:42,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765534774] [2021-03-10 22:32:42,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519350232] [2021-03-10 22:32:42,644 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:32:42,665 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:32:42,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:32:42,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:32:42,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:32:42,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:32:42,716 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 [2021-03-10 22:32:42,717 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:32:42,723 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:32:42,724 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:32:42,724 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-03-10 22:32:42,770 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:42,770 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:32:42,770 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-03-10 22:32:42,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721865123] [2021-03-10 22:32:42,770 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:32:42,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:32:42,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:32:42,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:32:42,771 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) [2021-03-10 22:32:43,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:32:43,065 INFO L93 Difference]: Finished difference Result 448 states and 1357 transitions. [2021-03-10 22:32:43,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:32:43,066 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 [2021-03-10 22:32:43,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:32:43,067 INFO L225 Difference]: With dead ends: 448 [2021-03-10 22:32:43,067 INFO L226 Difference]: Without dead ends: 438 [2021-03-10 22:32:43,067 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 247.8ms TimeCoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:32:43,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2021-03-10 22:32:43,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 312. [2021-03-10 22:32:43,071 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) [2021-03-10 22:32:43,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 968 transitions. [2021-03-10 22:32:43,072 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 968 transitions. Word has length 20 [2021-03-10 22:32:43,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:32:43,072 INFO L480 AbstractCegarLoop]: Abstraction has 312 states and 968 transitions. [2021-03-10 22:32:43,072 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) [2021-03-10 22:32:43,072 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 968 transitions. [2021-03-10 22:32:43,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:32:43,072 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:32:43,072 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:32:43,287 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:32:43,287 INFO L428 AbstractCegarLoop]: === Iteration 48 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-03-10 22:32:43,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:32:43,287 INFO L82 PathProgramCache]: Analyzing trace with hash -1438435337, now seen corresponding path program 17 times [2021-03-10 22:32:43,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:32:43,287 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608067164] [2021-03-10 22:32:43,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:32:43,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:32:43,413 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:43,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608067164] [2021-03-10 22:32:43,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632227185] [2021-03-10 22:32:43,414 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 [2021-03-10 22:32:43,434 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:32:43,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:32:43,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:32:43,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:32:43,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:32:43,495 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 [2021-03-10 22:32:43,496 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:32:43,504 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:32:43,505 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:32:43,505 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-03-10 22:32:43,559 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:43,560 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:32:43,560 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-03-10 22:32:43,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967801825] [2021-03-10 22:32:43,560 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:32:43,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:32:43,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:32:43,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:32:43,560 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) [2021-03-10 22:32:43,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:32:43,933 INFO L93 Difference]: Finished difference Result 497 states and 1504 transitions. [2021-03-10 22:32:43,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 22:32:43,934 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 [2021-03-10 22:32:43,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:32:43,935 INFO L225 Difference]: With dead ends: 497 [2021-03-10 22:32:43,935 INFO L226 Difference]: Without dead ends: 485 [2021-03-10 22:32:43,935 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 309.9ms TimeCoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:32:43,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2021-03-10 22:32:43,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 312. [2021-03-10 22:32:43,939 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) [2021-03-10 22:32:43,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 968 transitions. [2021-03-10 22:32:43,940 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 968 transitions. Word has length 20 [2021-03-10 22:32:43,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:32:43,940 INFO L480 AbstractCegarLoop]: Abstraction has 312 states and 968 transitions. [2021-03-10 22:32:43,940 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) [2021-03-10 22:32:43,940 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 968 transitions. [2021-03-10 22:32:43,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:32:43,940 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:32:43,940 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:32:44,143 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2021-03-10 22:32:44,143 INFO L428 AbstractCegarLoop]: === Iteration 49 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-03-10 22:32:44,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:32:44,143 INFO L82 PathProgramCache]: Analyzing trace with hash -1865369703, now seen corresponding path program 17 times [2021-03-10 22:32:44,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:32:44,143 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035941003] [2021-03-10 22:32:44,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:32:44,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:32:44,212 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:44,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035941003] [2021-03-10 22:32:44,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331425718] [2021-03-10 22:32:44,213 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 [2021-03-10 22:32:44,232 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:32:44,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:32:44,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:32:44,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:32:44,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:32:44,290 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 [2021-03-10 22:32:44,290 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:32:44,297 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:32:44,297 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:32:44,297 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-03-10 22:32:44,338 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:44,339 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:32:44,339 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-03-10 22:32:44,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879420668] [2021-03-10 22:32:44,339 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:32:44,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:32:44,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:32:44,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:32:44,339 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) [2021-03-10 22:32:44,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:32:44,508 INFO L93 Difference]: Finished difference Result 435 states and 1319 transitions. [2021-03-10 22:32:44,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 22:32:44,508 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 [2021-03-10 22:32:44,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:32:44,509 INFO L225 Difference]: With dead ends: 435 [2021-03-10 22:32:44,509 INFO L226 Difference]: Without dead ends: 426 [2021-03-10 22:32:44,509 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 177.7ms TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:32:44,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2021-03-10 22:32:44,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 315. [2021-03-10 22:32:44,513 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) [2021-03-10 22:32:44,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 978 transitions. [2021-03-10 22:32:44,514 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 978 transitions. Word has length 20 [2021-03-10 22:32:44,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:32:44,514 INFO L480 AbstractCegarLoop]: Abstraction has 315 states and 978 transitions. [2021-03-10 22:32:44,514 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) [2021-03-10 22:32:44,514 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 978 transitions. [2021-03-10 22:32:44,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:32:44,514 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:32:44,514 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:32:44,720 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-03-10 22:32:44,721 INFO L428 AbstractCegarLoop]: === Iteration 50 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-03-10 22:32:44,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:32:44,721 INFO L82 PathProgramCache]: Analyzing trace with hash -1541783525, now seen corresponding path program 18 times [2021-03-10 22:32:44,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:32:44,721 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357960295] [2021-03-10 22:32:44,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:32:44,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:32:44,786 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:44,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357960295] [2021-03-10 22:32:44,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165688507] [2021-03-10 22:32:44,786 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 [2021-03-10 22:32:44,806 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:32:44,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:32:44,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:32:44,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:32:44,852 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:32:44,852 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 [2021-03-10 22:32:44,853 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-10 22:32:44,860 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:32:44,861 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:32:44,861 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:21 [2021-03-10 22:32:44,942 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:44,942 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:32:44,942 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-03-10 22:32:44,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475635027] [2021-03-10 22:32:44,942 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:32:44,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:32:44,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:32:44,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:32:44,943 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) [2021-03-10 22:32:45,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:32:45,239 INFO L93 Difference]: Finished difference Result 432 states and 1315 transitions. [2021-03-10 22:32:45,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:32:45,239 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 [2021-03-10 22:32:45,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:32:45,240 INFO L225 Difference]: With dead ends: 432 [2021-03-10 22:32:45,240 INFO L226 Difference]: Without dead ends: 421 [2021-03-10 22:32:45,240 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 241.6ms TimeCoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:32:45,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2021-03-10 22:32:45,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 312. [2021-03-10 22:32:45,244 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) [2021-03-10 22:32:45,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 968 transitions. [2021-03-10 22:32:45,245 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 968 transitions. Word has length 20 [2021-03-10 22:32:45,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:32:45,245 INFO L480 AbstractCegarLoop]: Abstraction has 312 states and 968 transitions. [2021-03-10 22:32:45,245 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) [2021-03-10 22:32:45,245 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 968 transitions. [2021-03-10 22:32:45,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:32:45,245 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:32:45,245 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:32:45,459 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:32:45,459 INFO L428 AbstractCegarLoop]: === Iteration 51 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-03-10 22:32:45,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:32:45,460 INFO L82 PathProgramCache]: Analyzing trace with hash -1004860857, now seen corresponding path program 18 times [2021-03-10 22:32:45,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:32:45,460 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001889931] [2021-03-10 22:32:45,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:32:45,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:32:45,545 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:45,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001889931] [2021-03-10 22:32:45,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624937034] [2021-03-10 22:32:45,545 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) [2021-03-10 22:32:45,582 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:32:45,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:32:45,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:32:45,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:32:45,652 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:32:45,652 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 [2021-03-10 22:32:45,653 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-10 22:32:45,661 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:32:45,663 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:32:45,664 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:29 [2021-03-10 22:32:45,728 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:45,729 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:32:45,729 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:32:45,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176780046] [2021-03-10 22:32:45,729 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:32:45,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:32:45,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:32:45,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:32:45,729 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) [2021-03-10 22:32:46,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:32:46,672 INFO L93 Difference]: Finished difference Result 644 states and 1918 transitions. [2021-03-10 22:32:46,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 22:32:46,672 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 [2021-03-10 22:32:46,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:32:46,673 INFO L225 Difference]: With dead ends: 644 [2021-03-10 22:32:46,673 INFO L226 Difference]: Without dead ends: 622 [2021-03-10 22:32:46,673 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 671.4ms TimeCoverageRelationStatistics Valid=160, Invalid=832, Unknown=0, NotChecked=0, Total=992 [2021-03-10 22:32:46,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 622 states. [2021-03-10 22:32:46,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 622 to 316. [2021-03-10 22:32:46,678 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) [2021-03-10 22:32:46,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 980 transitions. [2021-03-10 22:32:46,678 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 980 transitions. Word has length 20 [2021-03-10 22:32:46,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:32:46,678 INFO L480 AbstractCegarLoop]: Abstraction has 316 states and 980 transitions. [2021-03-10 22:32:46,678 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) [2021-03-10 22:32:46,678 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 980 transitions. [2021-03-10 22:32:46,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:32:46,679 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:32:46,679 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:32:46,883 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:32:46,883 INFO L428 AbstractCegarLoop]: === Iteration 52 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-03-10 22:32:46,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:32:46,883 INFO L82 PathProgramCache]: Analyzing trace with hash -1209778991, now seen corresponding path program 19 times [2021-03-10 22:32:46,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:32:46,883 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698998010] [2021-03-10 22:32:46,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:32:46,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:32:46,961 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:46,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698998010] [2021-03-10 22:32:46,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794229011] [2021-03-10 22:32:46,962 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 [2021-03-10 22:32:46,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:32:46,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:32:46,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:32:47,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:32:47,055 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 [2021-03-10 22:32:47,055 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:32:47,061 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:32:47,062 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:32:47,062 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-03-10 22:32:47,096 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:47,096 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:32:47,096 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-03-10 22:32:47,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614921206] [2021-03-10 22:32:47,096 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:32:47,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:32:47,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:32:47,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:32:47,096 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) [2021-03-10 22:32:47,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:32:47,332 INFO L93 Difference]: Finished difference Result 437 states and 1326 transitions. [2021-03-10 22:32:47,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:32:47,332 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 [2021-03-10 22:32:47,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:32:47,333 INFO L225 Difference]: With dead ends: 437 [2021-03-10 22:32:47,333 INFO L226 Difference]: Without dead ends: 426 [2021-03-10 22:32:47,333 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 202.6ms TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:32:47,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2021-03-10 22:32:47,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 315. [2021-03-10 22:32:47,337 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) [2021-03-10 22:32:47,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 979 transitions. [2021-03-10 22:32:47,337 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 979 transitions. Word has length 20 [2021-03-10 22:32:47,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:32:47,337 INFO L480 AbstractCegarLoop]: Abstraction has 315 states and 979 transitions. [2021-03-10 22:32:47,337 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) [2021-03-10 22:32:47,337 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 979 transitions. [2021-03-10 22:32:47,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:32:47,338 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:32:47,338 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:32:47,545 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:32:47,545 INFO L428 AbstractCegarLoop]: === Iteration 53 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-03-10 22:32:47,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:32:47,545 INFO L82 PathProgramCache]: Analyzing trace with hash -1625404767, now seen corresponding path program 19 times [2021-03-10 22:32:47,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:32:47,545 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157474885] [2021-03-10 22:32:47,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:32:47,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:32:47,625 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:47,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157474885] [2021-03-10 22:32:47,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281673251] [2021-03-10 22:32:47,625 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 [2021-03-10 22:32:47,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:32:47,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:32:47,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:32:47,712 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:32:47,712 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 [2021-03-10 22:32:47,713 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:32:47,718 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:32:47,719 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:32:47,719 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-03-10 22:32:47,752 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:47,753 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:32:47,753 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-03-10 22:32:47,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863623751] [2021-03-10 22:32:47,753 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:32:47,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:32:47,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:32:47,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:32:47,753 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) [2021-03-10 22:32:48,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:32:48,223 INFO L93 Difference]: Finished difference Result 577 states and 1769 transitions. [2021-03-10 22:32:48,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 22:32:48,224 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 [2021-03-10 22:32:48,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:32:48,225 INFO L225 Difference]: With dead ends: 577 [2021-03-10 22:32:48,225 INFO L226 Difference]: Without dead ends: 566 [2021-03-10 22:32:48,225 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 288.0ms TimeCoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:32:48,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2021-03-10 22:32:48,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 323. [2021-03-10 22:32:48,229 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) [2021-03-10 22:32:48,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 1004 transitions. [2021-03-10 22:32:48,230 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 1004 transitions. Word has length 20 [2021-03-10 22:32:48,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:32:48,230 INFO L480 AbstractCegarLoop]: Abstraction has 323 states and 1004 transitions. [2021-03-10 22:32:48,230 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) [2021-03-10 22:32:48,230 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 1004 transitions. [2021-03-10 22:32:48,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:32:48,230 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:32:48,230 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:32:48,439 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:32:48,439 INFO L428 AbstractCegarLoop]: === Iteration 54 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-03-10 22:32:48,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:32:48,439 INFO L82 PathProgramCache]: Analyzing trace with hash -1821665449, now seen corresponding path program 20 times [2021-03-10 22:32:48,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:32:48,439 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864344216] [2021-03-10 22:32:48,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:32:48,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:32:48,504 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:48,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864344216] [2021-03-10 22:32:48,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599615554] [2021-03-10 22:32:48,504 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 [2021-03-10 22:32:48,525 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:32:48,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:32:48,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 22:32:48,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:32:48,593 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:32:48,594 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 [2021-03-10 22:32:48,596 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-10 22:32:48,604 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:32:48,605 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:32:48,605 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:22 [2021-03-10 22:32:48,665 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:48,665 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:32:48,665 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-03-10 22:32:48,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938892657] [2021-03-10 22:32:48,666 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:32:48,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:32:48,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:32:48,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:32:48,666 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) [2021-03-10 22:32:49,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:32:49,055 INFO L93 Difference]: Finished difference Result 516 states and 1586 transitions. [2021-03-10 22:32:49,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:32:49,055 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 [2021-03-10 22:32:49,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:32:49,056 INFO L225 Difference]: With dead ends: 516 [2021-03-10 22:32:49,056 INFO L226 Difference]: Without dead ends: 505 [2021-03-10 22:32:49,056 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 268.8ms TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:32:49,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2021-03-10 22:32:49,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 322. [2021-03-10 22:32:49,060 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) [2021-03-10 22:32:49,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 1003 transitions. [2021-03-10 22:32:49,061 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 1003 transitions. Word has length 20 [2021-03-10 22:32:49,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:32:49,061 INFO L480 AbstractCegarLoop]: Abstraction has 322 states and 1003 transitions. [2021-03-10 22:32:49,061 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) [2021-03-10 22:32:49,061 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 1003 transitions. [2021-03-10 22:32:49,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 22:32:49,061 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:32:49,062 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:32:49,262 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:32:49,262 INFO L428 AbstractCegarLoop]: === Iteration 55 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-03-10 22:32:49,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:32:49,262 INFO L82 PathProgramCache]: Analyzing trace with hash -827696633, now seen corresponding path program 20 times [2021-03-10 22:32:49,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:32:49,262 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162145361] [2021-03-10 22:32:49,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:32:49,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:32:49,282 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:49,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162145361] [2021-03-10 22:32:49,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331215322] [2021-03-10 22:32:49,282 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 [2021-03-10 22:32:49,302 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:32:49,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:32:49,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 22:32:49,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:32:49,348 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:49,348 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:32:49,348 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-03-10 22:32:49,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434192829] [2021-03-10 22:32:49,348 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 22:32:49,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:32:49,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 22:32:49,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-03-10 22:32:49,349 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) [2021-03-10 22:32:49,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:32:49,404 INFO L93 Difference]: Finished difference Result 489 states and 1527 transitions. [2021-03-10 22:32:49,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 22:32:49,405 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 [2021-03-10 22:32:49,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:32:49,406 INFO L225 Difference]: With dead ends: 489 [2021-03-10 22:32:49,406 INFO L226 Difference]: Without dead ends: 489 [2021-03-10 22:32:49,406 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 40.7ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:32:49,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2021-03-10 22:32:49,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 311. [2021-03-10 22:32:49,409 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) [2021-03-10 22:32:49,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 993 transitions. [2021-03-10 22:32:49,410 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 993 transitions. Word has length 22 [2021-03-10 22:32:49,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:32:49,410 INFO L480 AbstractCegarLoop]: Abstraction has 311 states and 993 transitions. [2021-03-10 22:32:49,410 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) [2021-03-10 22:32:49,410 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 993 transitions. [2021-03-10 22:32:49,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 22:32:49,411 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:32:49,411 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:32:49,625 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:32:49,625 INFO L428 AbstractCegarLoop]: === Iteration 56 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-03-10 22:32:49,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:32:49,625 INFO L82 PathProgramCache]: Analyzing trace with hash 196643718, now seen corresponding path program 21 times [2021-03-10 22:32:49,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:32:49,625 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107631575] [2021-03-10 22:32:49,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:32:49,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:32:49,644 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:49,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107631575] [2021-03-10 22:32:49,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931081641] [2021-03-10 22:32:49,645 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 [2021-03-10 22:32:49,665 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:32:49,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:32:49,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 22:32:49,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:32:49,713 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:49,713 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:32:49,713 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-03-10 22:32:49,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798626996] [2021-03-10 22:32:49,713 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 22:32:49,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:32:49,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 22:32:49,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-03-10 22:32:49,714 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) [2021-03-10 22:32:49,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:32:49,788 INFO L93 Difference]: Finished difference Result 498 states and 1529 transitions. [2021-03-10 22:32:49,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:32:49,788 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 [2021-03-10 22:32:49,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:32:49,789 INFO L225 Difference]: With dead ends: 498 [2021-03-10 22:32:49,789 INFO L226 Difference]: Without dead ends: 439 [2021-03-10 22:32:49,789 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 54.5ms TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:32:49,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2021-03-10 22:32:49,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 311. [2021-03-10 22:32:49,793 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) [2021-03-10 22:32:49,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 983 transitions. [2021-03-10 22:32:49,793 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 983 transitions. Word has length 22 [2021-03-10 22:32:49,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:32:49,793 INFO L480 AbstractCegarLoop]: Abstraction has 311 states and 983 transitions. [2021-03-10 22:32:49,794 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) [2021-03-10 22:32:49,794 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 983 transitions. [2021-03-10 22:32:49,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 22:32:49,794 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:32:49,794 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:32:50,007 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2021-03-10 22:32:50,007 INFO L428 AbstractCegarLoop]: === Iteration 57 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-03-10 22:32:50,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:32:50,007 INFO L82 PathProgramCache]: Analyzing trace with hash -1724048449, now seen corresponding path program 22 times [2021-03-10 22:32:50,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:32:50,007 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736135589] [2021-03-10 22:32:50,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:32:50,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:32:50,037 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:50,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736135589] [2021-03-10 22:32:50,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796932653] [2021-03-10 22:32:50,037 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 [2021-03-10 22:32:50,066 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:32:50,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:32:50,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 22:32:50,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:32:50,114 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:50,114 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:32:50,114 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-03-10 22:32:50,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719730175] [2021-03-10 22:32:50,115 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 22:32:50,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:32:50,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 22:32:50,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-03-10 22:32:50,115 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) [2021-03-10 22:32:50,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:32:50,221 INFO L93 Difference]: Finished difference Result 640 states and 1919 transitions. [2021-03-10 22:32:50,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:32:50,221 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 [2021-03-10 22:32:50,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:32:50,222 INFO L225 Difference]: With dead ends: 640 [2021-03-10 22:32:50,223 INFO L226 Difference]: Without dead ends: 640 [2021-03-10 22:32:50,223 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 66.9ms TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:32:50,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 640 states. [2021-03-10 22:32:50,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 640 to 368. [2021-03-10 22:32:50,227 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) [2021-03-10 22:32:50,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 1186 transitions. [2021-03-10 22:32:50,228 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 1186 transitions. Word has length 22 [2021-03-10 22:32:50,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:32:50,228 INFO L480 AbstractCegarLoop]: Abstraction has 368 states and 1186 transitions. [2021-03-10 22:32:50,228 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) [2021-03-10 22:32:50,228 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 1186 transitions. [2021-03-10 22:32:50,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 22:32:50,229 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:32:50,229 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:32:50,437 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-03-10 22:32:50,437 INFO L428 AbstractCegarLoop]: === Iteration 58 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-03-10 22:32:50,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:32:50,437 INFO L82 PathProgramCache]: Analyzing trace with hash 40343294, now seen corresponding path program 23 times [2021-03-10 22:32:50,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:32:50,437 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108255085] [2021-03-10 22:32:50,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:32:50,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:32:50,456 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:50,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108255085] [2021-03-10 22:32:50,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047737137] [2021-03-10 22:32:50,457 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 [2021-03-10 22:32:50,477 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:32:50,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:32:50,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 22:32:50,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:32:50,544 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:50,544 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:32:50,544 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-03-10 22:32:50,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133098184] [2021-03-10 22:32:50,544 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 22:32:50,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:32:50,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 22:32:50,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-03-10 22:32:50,544 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) [2021-03-10 22:32:50,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:32:50,690 INFO L93 Difference]: Finished difference Result 772 states and 2287 transitions. [2021-03-10 22:32:50,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 22:32:50,690 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 [2021-03-10 22:32:50,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:32:50,692 INFO L225 Difference]: With dead ends: 772 [2021-03-10 22:32:50,692 INFO L226 Difference]: Without dead ends: 728 [2021-03-10 22:32:50,692 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 103.0ms TimeCoverageRelationStatistics Valid=115, Invalid=265, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:32:50,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 728 states. [2021-03-10 22:32:50,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 728 to 506. [2021-03-10 22:32:50,698 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) [2021-03-10 22:32:50,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 1634 transitions. [2021-03-10 22:32:50,699 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 1634 transitions. Word has length 22 [2021-03-10 22:32:50,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:32:50,699 INFO L480 AbstractCegarLoop]: Abstraction has 506 states and 1634 transitions. [2021-03-10 22:32:50,699 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) [2021-03-10 22:32:50,699 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 1634 transitions. [2021-03-10 22:32:50,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 22:32:50,700 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:32:50,700 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:32:50,900 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-03-10 22:32:50,900 INFO L428 AbstractCegarLoop]: === Iteration 59 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-03-10 22:32:50,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:32:50,900 INFO L82 PathProgramCache]: Analyzing trace with hash 358278619, now seen corresponding path program 24 times [2021-03-10 22:32:50,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:32:50,900 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832226623] [2021-03-10 22:32:50,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:32:50,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:32:50,922 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:50,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832226623] [2021-03-10 22:32:50,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783222288] [2021-03-10 22:32:50,923 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) [2021-03-10 22:32:50,946 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:32:50,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:32:50,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 22:32:50,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:32:50,993 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:50,993 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:32:50,994 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-03-10 22:32:50,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864691665] [2021-03-10 22:32:50,994 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 22:32:50,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:32:50,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 22:32:50,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-03-10 22:32:50,994 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) [2021-03-10 22:32:51,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:32:51,118 INFO L93 Difference]: Finished difference Result 972 states and 2907 transitions. [2021-03-10 22:32:51,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:32:51,118 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 [2021-03-10 22:32:51,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:32:51,120 INFO L225 Difference]: With dead ends: 972 [2021-03-10 22:32:51,120 INFO L226 Difference]: Without dead ends: 972 [2021-03-10 22:32:51,120 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 70.9ms TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:32:51,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 972 states. [2021-03-10 22:32:51,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 972 to 557. [2021-03-10 22:32:51,127 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) [2021-03-10 22:32:51,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 557 states to 557 states and 1845 transitions. [2021-03-10 22:32:51,128 INFO L78 Accepts]: Start accepts. Automaton has 557 states and 1845 transitions. Word has length 22 [2021-03-10 22:32:51,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:32:51,128 INFO L480 AbstractCegarLoop]: Abstraction has 557 states and 1845 transitions. [2021-03-10 22:32:51,128 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) [2021-03-10 22:32:51,128 INFO L276 IsEmpty]: Start isEmpty. Operand 557 states and 1845 transitions. [2021-03-10 22:32:51,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 22:32:51,129 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:32:51,129 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:32:51,342 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:32:51,342 INFO L428 AbstractCegarLoop]: === Iteration 60 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-03-10 22:32:51,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:32:51,343 INFO L82 PathProgramCache]: Analyzing trace with hash -527046306, now seen corresponding path program 25 times [2021-03-10 22:32:51,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:32:51,343 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687810223] [2021-03-10 22:32:51,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:32:51,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:32:51,364 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:51,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687810223] [2021-03-10 22:32:51,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655334102] [2021-03-10 22:32:51,365 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 [2021-03-10 22:32:51,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:32:51,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 22:32:51,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:32:51,440 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:51,440 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:32:51,440 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-03-10 22:32:51,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882799991] [2021-03-10 22:32:51,440 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 22:32:51,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:32:51,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 22:32:51,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-03-10 22:32:51,441 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) [2021-03-10 22:32:51,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:32:51,604 INFO L93 Difference]: Finished difference Result 964 states and 2972 transitions. [2021-03-10 22:32:51,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 22:32:51,604 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 [2021-03-10 22:32:51,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:32:51,606 INFO L225 Difference]: With dead ends: 964 [2021-03-10 22:32:51,606 INFO L226 Difference]: Without dead ends: 916 [2021-03-10 22:32:51,606 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 103.6ms TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:32:51,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 916 states. [2021-03-10 22:32:51,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 916 to 606. [2021-03-10 22:32:51,613 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) [2021-03-10 22:32:51,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 606 states to 606 states and 2017 transitions. [2021-03-10 22:32:51,615 INFO L78 Accepts]: Start accepts. Automaton has 606 states and 2017 transitions. Word has length 22 [2021-03-10 22:32:51,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:32:51,615 INFO L480 AbstractCegarLoop]: Abstraction has 606 states and 2017 transitions. [2021-03-10 22:32:51,615 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) [2021-03-10 22:32:51,615 INFO L276 IsEmpty]: Start isEmpty. Operand 606 states and 2017 transitions. [2021-03-10 22:32:51,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 22:32:51,616 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:32:51,616 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:32:51,816 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-03-10 22:32:51,816 INFO L428 AbstractCegarLoop]: === Iteration 61 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-03-10 22:32:51,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:32:51,816 INFO L82 PathProgramCache]: Analyzing trace with hash -1135425701, now seen corresponding path program 26 times [2021-03-10 22:32:51,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:32:51,816 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801384080] [2021-03-10 22:32:51,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:32:51,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:32:51,840 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:51,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801384080] [2021-03-10 22:32:51,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630460792] [2021-03-10 22:32:51,840 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) [2021-03-10 22:32:51,868 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:32:51,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:32:51,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 22:32:51,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:32:51,913 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:51,913 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:32:51,913 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-03-10 22:32:51,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195821565] [2021-03-10 22:32:51,913 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 22:32:51,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:32:51,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 22:32:51,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-03-10 22:32:51,914 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) [2021-03-10 22:32:52,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:32:52,062 INFO L93 Difference]: Finished difference Result 881 states and 2727 transitions. [2021-03-10 22:32:52,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 22:32:52,062 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 [2021-03-10 22:32:52,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:32:52,064 INFO L225 Difference]: With dead ends: 881 [2021-03-10 22:32:52,064 INFO L226 Difference]: Without dead ends: 871 [2021-03-10 22:32:52,064 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 97.9ms TimeCoverageRelationStatistics Valid=149, Invalid=271, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:32:52,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 871 states. [2021-03-10 22:32:52,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 871 to 612. [2021-03-10 22:32:52,071 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) [2021-03-10 22:32:52,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 612 states to 612 states and 2020 transitions. [2021-03-10 22:32:52,072 INFO L78 Accepts]: Start accepts. Automaton has 612 states and 2020 transitions. Word has length 22 [2021-03-10 22:32:52,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:32:52,072 INFO L480 AbstractCegarLoop]: Abstraction has 612 states and 2020 transitions. [2021-03-10 22:32:52,072 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) [2021-03-10 22:32:52,072 INFO L276 IsEmpty]: Start isEmpty. Operand 612 states and 2020 transitions. [2021-03-10 22:32:52,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 22:32:52,073 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:32:52,073 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:32:52,291 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-03-10 22:32:52,291 INFO L428 AbstractCegarLoop]: === Iteration 62 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-03-10 22:32:52,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:32:52,292 INFO L82 PathProgramCache]: Analyzing trace with hash -1507852130, now seen corresponding path program 27 times [2021-03-10 22:32:52,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:32:52,292 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21168730] [2021-03-10 22:32:52,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:32:52,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:32:52,312 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:52,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21168730] [2021-03-10 22:32:52,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694533659] [2021-03-10 22:32:52,312 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 [2021-03-10 22:32:52,334 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:32:52,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:32:52,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 22:32:52,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:32:52,378 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:52,378 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:32:52,378 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-03-10 22:32:52,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742526545] [2021-03-10 22:32:52,378 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 22:32:52,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:32:52,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 22:32:52,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-03-10 22:32:52,379 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) [2021-03-10 22:32:52,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:32:52,498 INFO L93 Difference]: Finished difference Result 917 states and 2822 transitions. [2021-03-10 22:32:52,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:32:52,499 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 [2021-03-10 22:32:52,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:32:52,500 INFO L225 Difference]: With dead ends: 917 [2021-03-10 22:32:52,500 INFO L226 Difference]: Without dead ends: 893 [2021-03-10 22:32:52,500 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 70.0ms TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:32:52,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 893 states. [2021-03-10 22:32:52,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 893 to 606. [2021-03-10 22:32:52,508 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) [2021-03-10 22:32:52,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 606 states to 606 states and 2011 transitions. [2021-03-10 22:32:52,509 INFO L78 Accepts]: Start accepts. Automaton has 606 states and 2011 transitions. Word has length 22 [2021-03-10 22:32:52,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:32:52,510 INFO L480 AbstractCegarLoop]: Abstraction has 606 states and 2011 transitions. [2021-03-10 22:32:52,510 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) [2021-03-10 22:32:52,510 INFO L276 IsEmpty]: Start isEmpty. Operand 606 states and 2011 transitions. [2021-03-10 22:32:52,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 22:32:52,511 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:32:52,511 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:32:52,719 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:32:52,719 INFO L428 AbstractCegarLoop]: === Iteration 63 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-03-10 22:32:52,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:32:52,719 INFO L82 PathProgramCache]: Analyzing trace with hash 326583295, now seen corresponding path program 28 times [2021-03-10 22:32:52,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:32:52,719 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327791748] [2021-03-10 22:32:52,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:32:52,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:32:52,739 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:52,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327791748] [2021-03-10 22:32:52,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879729693] [2021-03-10 22:32:52,739 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 [2021-03-10 22:32:52,769 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:32:52,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:32:52,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 22:32:52,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:32:52,822 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:52,823 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:32:52,823 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-03-10 22:32:52,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102874577] [2021-03-10 22:32:52,823 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 22:32:52,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:32:52,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 22:32:52,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-03-10 22:32:52,823 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) [2021-03-10 22:32:52,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:32:52,971 INFO L93 Difference]: Finished difference Result 1221 states and 3751 transitions. [2021-03-10 22:32:52,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:32:52,972 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 [2021-03-10 22:32:52,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:32:52,974 INFO L225 Difference]: With dead ends: 1221 [2021-03-10 22:32:52,974 INFO L226 Difference]: Without dead ends: 1221 [2021-03-10 22:32:52,974 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 98.0ms TimeCoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:32:52,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1221 states. [2021-03-10 22:32:52,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1221 to 650. [2021-03-10 22:32:52,983 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) [2021-03-10 22:32:52,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 650 states to 650 states and 2182 transitions. [2021-03-10 22:32:52,984 INFO L78 Accepts]: Start accepts. Automaton has 650 states and 2182 transitions. Word has length 22 [2021-03-10 22:32:52,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:32:52,984 INFO L480 AbstractCegarLoop]: Abstraction has 650 states and 2182 transitions. [2021-03-10 22:32:52,984 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) [2021-03-10 22:32:52,985 INFO L276 IsEmpty]: Start isEmpty. Operand 650 states and 2182 transitions. [2021-03-10 22:32:52,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 22:32:52,985 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:32:52,985 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:32:53,199 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2021-03-10 22:32:53,199 INFO L428 AbstractCegarLoop]: === Iteration 64 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-03-10 22:32:53,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:32:53,199 INFO L82 PathProgramCache]: Analyzing trace with hash -1657114921, now seen corresponding path program 29 times [2021-03-10 22:32:53,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:32:53,200 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341042570] [2021-03-10 22:32:53,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:32:53,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:32:53,224 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:53,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341042570] [2021-03-10 22:32:53,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196886556] [2021-03-10 22:32:53,224 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 [2021-03-10 22:32:53,244 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 22:32:53,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:32:53,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 22:32:53,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:32:53,313 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:53,314 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:32:53,314 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-03-10 22:32:53,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646020567] [2021-03-10 22:32:53,314 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 22:32:53,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:32:53,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 22:32:53,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-03-10 22:32:53,315 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) [2021-03-10 22:32:53,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:32:53,442 INFO L93 Difference]: Finished difference Result 1386 states and 4279 transitions. [2021-03-10 22:32:53,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:32:53,442 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 [2021-03-10 22:32:53,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:32:53,444 INFO L225 Difference]: With dead ends: 1386 [2021-03-10 22:32:53,444 INFO L226 Difference]: Without dead ends: 1386 [2021-03-10 22:32:53,444 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 84.6ms TimeCoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:32:53,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1386 states. [2021-03-10 22:32:53,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1386 to 762. [2021-03-10 22:32:53,455 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) [2021-03-10 22:32:53,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 762 states to 762 states and 2624 transitions. [2021-03-10 22:32:53,456 INFO L78 Accepts]: Start accepts. Automaton has 762 states and 2624 transitions. Word has length 22 [2021-03-10 22:32:53,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:32:53,456 INFO L480 AbstractCegarLoop]: Abstraction has 762 states and 2624 transitions. [2021-03-10 22:32:53,456 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) [2021-03-10 22:32:53,456 INFO L276 IsEmpty]: Start isEmpty. Operand 762 states and 2624 transitions. [2021-03-10 22:32:53,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 22:32:53,457 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:32:53,457 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:32:53,672 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-03-10 22:32:53,672 INFO L428 AbstractCegarLoop]: === Iteration 65 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-03-10 22:32:53,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:32:53,672 INFO L82 PathProgramCache]: Analyzing trace with hash 1144148055, now seen corresponding path program 30 times [2021-03-10 22:32:53,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:32:53,672 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944815688] [2021-03-10 22:32:53,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:32:53,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:32:53,694 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:32:53,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944815688] [2021-03-10 22:32:53,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031951296] [2021-03-10 22:32:53,695 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 [2021-03-10 22:32:53,717 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 22:32:53,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:32:53,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 22:32:53,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:32:53,767 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:53,767 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:32:53,767 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-03-10 22:32:53,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906871610] [2021-03-10 22:32:53,767 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 22:32:53,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:32:53,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 22:32:53,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-03-10 22:32:53,768 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) [2021-03-10 22:32:53,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:32:53,937 INFO L93 Difference]: Finished difference Result 1253 states and 3889 transitions. [2021-03-10 22:32:53,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 22:32:53,938 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 [2021-03-10 22:32:53,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:32:53,940 INFO L225 Difference]: With dead ends: 1253 [2021-03-10 22:32:53,940 INFO L226 Difference]: Without dead ends: 1244 [2021-03-10 22:32:53,940 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 118.7ms TimeCoverageRelationStatistics Valid=165, Invalid=297, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:32:53,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1244 states. [2021-03-10 22:32:53,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1244 to 762. [2021-03-10 22:32:53,949 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) [2021-03-10 22:32:53,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 762 states to 762 states and 2602 transitions. [2021-03-10 22:32:53,951 INFO L78 Accepts]: Start accepts. Automaton has 762 states and 2602 transitions. Word has length 22 [2021-03-10 22:32:53,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:32:53,951 INFO L480 AbstractCegarLoop]: Abstraction has 762 states and 2602 transitions. [2021-03-10 22:32:53,951 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) [2021-03-10 22:32:53,951 INFO L276 IsEmpty]: Start isEmpty. Operand 762 states and 2602 transitions. [2021-03-10 22:32:53,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 22:32:53,952 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:32:53,952 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:32:54,166 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-03-10 22:32:54,167 INFO L428 AbstractCegarLoop]: === Iteration 66 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-03-10 22:32:54,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:32:54,167 INFO L82 PathProgramCache]: Analyzing trace with hash 1294632791, now seen corresponding path program 31 times [2021-03-10 22:32:54,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:32:54,167 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646970422] [2021-03-10 22:32:54,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:32:54,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:32:54,188 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:54,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646970422] [2021-03-10 22:32:54,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205134887] [2021-03-10 22:32:54,189 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 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 [2021-03-10 22:32:54,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:32:54,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 22:32:54,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:32:54,273 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:54,273 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:32:54,273 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-03-10 22:32:54,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526065208] [2021-03-10 22:32:54,273 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 22:32:54,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:32:54,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 22:32:54,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-03-10 22:32:54,274 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) [2021-03-10 22:32:54,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:32:54,439 INFO L93 Difference]: Finished difference Result 1263 states and 4021 transitions. [2021-03-10 22:32:54,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 22:32:54,441 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 [2021-03-10 22:32:54,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:32:54,455 INFO L225 Difference]: With dead ends: 1263 [2021-03-10 22:32:54,456 INFO L226 Difference]: Without dead ends: 1251 [2021-03-10 22:32:54,456 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 118.1ms TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:32:54,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1251 states. [2021-03-10 22:32:54,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1251 to 847. [2021-03-10 22:32:54,466 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) [2021-03-10 22:32:54,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 847 states to 847 states and 2922 transitions. [2021-03-10 22:32:54,467 INFO L78 Accepts]: Start accepts. Automaton has 847 states and 2922 transitions. Word has length 22 [2021-03-10 22:32:54,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:32:54,468 INFO L480 AbstractCegarLoop]: Abstraction has 847 states and 2922 transitions. [2021-03-10 22:32:54,468 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) [2021-03-10 22:32:54,468 INFO L276 IsEmpty]: Start isEmpty. Operand 847 states and 2922 transitions. [2021-03-10 22:32:54,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 22:32:54,469 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:32:54,469 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:32:54,683 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:32:54,683 INFO L428 AbstractCegarLoop]: === Iteration 67 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-03-10 22:32:54,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:32:54,684 INFO L82 PathProgramCache]: Analyzing trace with hash -1456964799, now seen corresponding path program 32 times [2021-03-10 22:32:54,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:32:54,684 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704855842] [2021-03-10 22:32:54,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:32:54,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:32:54,704 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:54,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704855842] [2021-03-10 22:32:54,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516776725] [2021-03-10 22:32:54,705 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 [2021-03-10 22:32:54,725 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:32:54,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:32:54,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 22:32:54,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:32:54,782 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:54,782 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:32:54,782 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-03-10 22:32:54,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156077979] [2021-03-10 22:32:54,782 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 22:32:54,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:32:54,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 22:32:54,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-03-10 22:32:54,782 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) [2021-03-10 22:32:54,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:32:54,937 INFO L93 Difference]: Finished difference Result 1246 states and 3991 transitions. [2021-03-10 22:32:54,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:32:54,937 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 [2021-03-10 22:32:54,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:32:54,939 INFO L225 Difference]: With dead ends: 1246 [2021-03-10 22:32:54,939 INFO L226 Difference]: Without dead ends: 1246 [2021-03-10 22:32:54,939 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 88.4ms TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:32:54,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1246 states. [2021-03-10 22:32:54,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1246 to 888. [2021-03-10 22:32:54,955 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) [2021-03-10 22:32:54,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 3083 transitions. [2021-03-10 22:32:54,957 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 3083 transitions. Word has length 22 [2021-03-10 22:32:54,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:32:54,957 INFO L480 AbstractCegarLoop]: Abstraction has 888 states and 3083 transitions. [2021-03-10 22:32:54,957 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) [2021-03-10 22:32:54,957 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 3083 transitions. [2021-03-10 22:32:54,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 22:32:54,959 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:32:54,959 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:32:55,159 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:32:55,159 INFO L428 AbstractCegarLoop]: === Iteration 68 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-03-10 22:32:55,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:32:55,159 INFO L82 PathProgramCache]: Analyzing trace with hash -1570199292, now seen corresponding path program 33 times [2021-03-10 22:32:55,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:32:55,159 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113020266] [2021-03-10 22:32:55,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:32:55,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:32:55,181 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:55,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113020266] [2021-03-10 22:32:55,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123710795] [2021-03-10 22:32:55,181 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 [2021-03-10 22:32:55,201 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:32:55,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:32:55,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 22:32:55,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:32:55,256 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:55,256 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:32:55,256 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-03-10 22:32:55,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586744537] [2021-03-10 22:32:55,263 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 22:32:55,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:32:55,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 22:32:55,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-03-10 22:32:55,263 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) [2021-03-10 22:32:55,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:32:55,452 INFO L93 Difference]: Finished difference Result 1362 states and 4328 transitions. [2021-03-10 22:32:55,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 22:32:55,452 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 [2021-03-10 22:32:55,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:32:55,454 INFO L225 Difference]: With dead ends: 1362 [2021-03-10 22:32:55,454 INFO L226 Difference]: Without dead ends: 1275 [2021-03-10 22:32:55,454 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 139.5ms TimeCoverageRelationStatistics Valid=198, Invalid=402, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:32:55,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1275 states. [2021-03-10 22:32:55,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1275 to 976. [2021-03-10 22:32:55,466 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) [2021-03-10 22:32:55,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 976 states to 976 states and 3371 transitions. [2021-03-10 22:32:55,467 INFO L78 Accepts]: Start accepts. Automaton has 976 states and 3371 transitions. Word has length 22 [2021-03-10 22:32:55,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:32:55,468 INFO L480 AbstractCegarLoop]: Abstraction has 976 states and 3371 transitions. [2021-03-10 22:32:55,468 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) [2021-03-10 22:32:55,468 INFO L276 IsEmpty]: Start isEmpty. Operand 976 states and 3371 transitions. [2021-03-10 22:32:55,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 22:32:55,469 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:32:55,469 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:32:55,683 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:32:55,683 INFO L428 AbstractCegarLoop]: === Iteration 69 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-03-10 22:32:55,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:32:55,683 INFO L82 PathProgramCache]: Analyzing trace with hash -1138465271, now seen corresponding path program 34 times [2021-03-10 22:32:55,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:32:55,683 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897746829] [2021-03-10 22:32:55,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:32:55,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:32:55,700 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:55,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897746829] [2021-03-10 22:32:55,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095790696] [2021-03-10 22:32:55,700 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) [2021-03-10 22:32:55,725 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:32:55,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:32:55,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 22:32:55,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:32:55,777 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:55,777 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:32:55,777 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-03-10 22:32:55,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346802258] [2021-03-10 22:32:55,778 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 22:32:55,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:32:55,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 22:32:55,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-03-10 22:32:55,778 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) [2021-03-10 22:32:55,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:32:55,917 INFO L93 Difference]: Finished difference Result 1340 states and 4319 transitions. [2021-03-10 22:32:55,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 22:32:55,917 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 [2021-03-10 22:32:55,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:32:55,919 INFO L225 Difference]: With dead ends: 1340 [2021-03-10 22:32:55,919 INFO L226 Difference]: Without dead ends: 1331 [2021-03-10 22:32:55,919 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 81.2ms TimeCoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:32:55,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1331 states. [2021-03-10 22:32:55,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1331 to 928. [2021-03-10 22:32:55,930 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) [2021-03-10 22:32:55,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 928 states to 928 states and 3172 transitions. [2021-03-10 22:32:55,931 INFO L78 Accepts]: Start accepts. Automaton has 928 states and 3172 transitions. Word has length 22 [2021-03-10 22:32:55,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:32:55,932 INFO L480 AbstractCegarLoop]: Abstraction has 928 states and 3172 transitions. [2021-03-10 22:32:55,932 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) [2021-03-10 22:32:55,932 INFO L276 IsEmpty]: Start isEmpty. Operand 928 states and 3172 transitions. [2021-03-10 22:32:55,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 22:32:55,933 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:32:55,933 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:32:56,133 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:32:56,133 INFO L428 AbstractCegarLoop]: === Iteration 70 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-03-10 22:32:56,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:32:56,134 INFO L82 PathProgramCache]: Analyzing trace with hash -1510891700, now seen corresponding path program 35 times [2021-03-10 22:32:56,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:32:56,134 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007119237] [2021-03-10 22:32:56,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:32:56,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:32:56,150 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:56,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007119237] [2021-03-10 22:32:56,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832953287] [2021-03-10 22:32:56,150 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 [2021-03-10 22:32:56,171 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:32:56,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:32:56,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 22:32:56,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:32:56,234 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:56,234 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:32:56,234 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-03-10 22:32:56,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971948698] [2021-03-10 22:32:56,234 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 22:32:56,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:32:56,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 22:32:56,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-03-10 22:32:56,235 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) [2021-03-10 22:32:56,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:32:56,342 INFO L93 Difference]: Finished difference Result 1477 states and 4669 transitions. [2021-03-10 22:32:56,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:32:56,343 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 [2021-03-10 22:32:56,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:32:56,345 INFO L225 Difference]: With dead ends: 1477 [2021-03-10 22:32:56,345 INFO L226 Difference]: Without dead ends: 1435 [2021-03-10 22:32:56,345 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 75.0ms TimeCoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:32:56,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1435 states. [2021-03-10 22:32:56,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1435 to 1075. [2021-03-10 22:32:56,368 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) [2021-03-10 22:32:56,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1075 states to 1075 states and 3686 transitions. [2021-03-10 22:32:56,370 INFO L78 Accepts]: Start accepts. Automaton has 1075 states and 3686 transitions. Word has length 22 [2021-03-10 22:32:56,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:32:56,372 INFO L480 AbstractCegarLoop]: Abstraction has 1075 states and 3686 transitions. [2021-03-10 22:32:56,372 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) [2021-03-10 22:32:56,372 INFO L276 IsEmpty]: Start isEmpty. Operand 1075 states and 3686 transitions. [2021-03-10 22:32:56,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 22:32:56,373 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:32:56,373 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:32:56,587 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-03-10 22:32:56,587 INFO L428 AbstractCegarLoop]: === Iteration 71 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-03-10 22:32:56,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:32:56,587 INFO L82 PathProgramCache]: Analyzing trace with hash 1381268681, now seen corresponding path program 36 times [2021-03-10 22:32:56,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:32:56,587 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916577242] [2021-03-10 22:32:56,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:32:56,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:32:56,604 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:56,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916577242] [2021-03-10 22:32:56,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155368073] [2021-03-10 22:32:56,604 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 [2021-03-10 22:32:56,623 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 22:32:56,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:32:56,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 22:32:56,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:32:56,676 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:56,676 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:32:56,676 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-03-10 22:32:56,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878911484] [2021-03-10 22:32:56,676 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 22:32:56,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:32:56,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 22:32:56,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-03-10 22:32:56,677 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) [2021-03-10 22:32:56,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:32:56,773 INFO L93 Difference]: Finished difference Result 1825 states and 5875 transitions. [2021-03-10 22:32:56,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:32:56,773 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 [2021-03-10 22:32:56,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:32:56,775 INFO L225 Difference]: With dead ends: 1825 [2021-03-10 22:32:56,775 INFO L226 Difference]: Without dead ends: 1825 [2021-03-10 22:32:56,775 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 61.8ms TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:32:56,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1825 states. [2021-03-10 22:32:56,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1825 to 1237. [2021-03-10 22:32:56,790 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) [2021-03-10 22:32:56,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1237 states to 1237 states and 4330 transitions. [2021-03-10 22:32:56,792 INFO L78 Accepts]: Start accepts. Automaton has 1237 states and 4330 transitions. Word has length 22 [2021-03-10 22:32:56,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:32:56,792 INFO L480 AbstractCegarLoop]: Abstraction has 1237 states and 4330 transitions. [2021-03-10 22:32:56,792 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) [2021-03-10 22:32:56,792 INFO L276 IsEmpty]: Start isEmpty. Operand 1237 states and 4330 transitions. [2021-03-10 22:32:56,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 22:32:56,794 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:32:56,794 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:32:56,994 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-03-10 22:32:56,995 INFO L428 AbstractCegarLoop]: === Iteration 72 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-03-10 22:32:56,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:32:56,995 INFO L82 PathProgramCache]: Analyzing trace with hash 495943756, now seen corresponding path program 37 times [2021-03-10 22:32:56,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:32:56,995 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793198778] [2021-03-10 22:32:56,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:32:56,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:32:57,011 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:57,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793198778] [2021-03-10 22:32:57,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920536062] [2021-03-10 22:32:57,011 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 [2021-03-10 22:32:57,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:32:57,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 22:32:57,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:32:57,087 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:57,087 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:32:57,088 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-03-10 22:32:57,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915334277] [2021-03-10 22:32:57,088 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 22:32:57,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:32:57,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 22:32:57,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-03-10 22:32:57,088 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) [2021-03-10 22:32:57,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:32:57,258 INFO L93 Difference]: Finished difference Result 1507 states and 5030 transitions. [2021-03-10 22:32:57,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 22:32:57,258 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 [2021-03-10 22:32:57,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:32:57,260 INFO L225 Difference]: With dead ends: 1507 [2021-03-10 22:32:57,260 INFO L226 Difference]: Without dead ends: 1464 [2021-03-10 22:32:57,260 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 104.3ms TimeCoverageRelationStatistics Valid=135, Invalid=285, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:32:57,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1464 states. [2021-03-10 22:32:57,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1464 to 1278. [2021-03-10 22:32:57,275 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) [2021-03-10 22:32:57,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1278 states to 1278 states and 4513 transitions. [2021-03-10 22:32:57,277 INFO L78 Accepts]: Start accepts. Automaton has 1278 states and 4513 transitions. Word has length 22 [2021-03-10 22:32:57,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:32:57,277 INFO L480 AbstractCegarLoop]: Abstraction has 1278 states and 4513 transitions. [2021-03-10 22:32:57,277 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) [2021-03-10 22:32:57,277 INFO L276 IsEmpty]: Start isEmpty. Operand 1278 states and 4513 transitions. [2021-03-10 22:32:57,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 22:32:57,279 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:32:57,279 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:32:57,480 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-03-10 22:32:57,480 INFO L428 AbstractCegarLoop]: === Iteration 73 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-03-10 22:32:57,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:32:57,480 INFO L82 PathProgramCache]: Analyzing trace with hash -112435639, now seen corresponding path program 38 times [2021-03-10 22:32:57,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:32:57,480 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504296743] [2021-03-10 22:32:57,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:32:57,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:32:57,496 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:32:57,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504296743] [2021-03-10 22:32:57,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804269879] [2021-03-10 22:32:57,497 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) [2021-03-10 22:32:57,531 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:32:57,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:32:57,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 22:32:57,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:32:57,581 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:57,581 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:32:57,581 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-03-10 22:32:57,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816131036] [2021-03-10 22:32:57,581 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 22:32:57,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:32:57,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 22:32:57,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-03-10 22:32:57,582 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) [2021-03-10 22:32:57,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:32:57,718 INFO L93 Difference]: Finished difference Result 1841 states and 5998 transitions. [2021-03-10 22:32:57,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 22:32:57,718 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 [2021-03-10 22:32:57,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:32:57,721 INFO L225 Difference]: With dead ends: 1841 [2021-03-10 22:32:57,721 INFO L226 Difference]: Without dead ends: 1832 [2021-03-10 22:32:57,721 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 82.4ms TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:32:57,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1832 states. [2021-03-10 22:32:57,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1832 to 1224. [2021-03-10 22:32:57,735 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) [2021-03-10 22:32:57,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1224 states to 1224 states and 4272 transitions. [2021-03-10 22:32:57,737 INFO L78 Accepts]: Start accepts. Automaton has 1224 states and 4272 transitions. Word has length 22 [2021-03-10 22:32:57,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:32:57,737 INFO L480 AbstractCegarLoop]: Abstraction has 1224 states and 4272 transitions. [2021-03-10 22:32:57,738 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) [2021-03-10 22:32:57,738 INFO L276 IsEmpty]: Start isEmpty. Operand 1224 states and 4272 transitions. [2021-03-10 22:32:57,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 22:32:57,739 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:32:57,739 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:32:57,939 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:32:57,940 INFO L428 AbstractCegarLoop]: === Iteration 74 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-03-10 22:32:57,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:32:57,940 INFO L82 PathProgramCache]: Analyzing trace with hash 38049097, now seen corresponding path program 39 times [2021-03-10 22:32:57,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:32:57,940 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863574527] [2021-03-10 22:32:57,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:32:57,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:32:57,963 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:57,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863574527] [2021-03-10 22:32:57,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481189772] [2021-03-10 22:32:57,963 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 [2021-03-10 22:32:57,984 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:32:57,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:32:57,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 22:32:57,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:32:58,039 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:58,040 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:32:58,040 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-03-10 22:32:58,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994926202] [2021-03-10 22:32:58,040 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 22:32:58,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:32:58,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 22:32:58,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-03-10 22:32:58,040 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) [2021-03-10 22:32:58,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:32:58,191 INFO L93 Difference]: Finished difference Result 1811 states and 5904 transitions. [2021-03-10 22:32:58,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 22:32:58,191 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 [2021-03-10 22:32:58,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:32:58,193 INFO L225 Difference]: With dead ends: 1811 [2021-03-10 22:32:58,193 INFO L226 Difference]: Without dead ends: 1799 [2021-03-10 22:32:58,193 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 103.8ms TimeCoverageRelationStatistics Valid=118, Invalid=302, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:32:58,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1799 states. [2021-03-10 22:32:58,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1799 to 1222. [2021-03-10 22:32:58,208 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) [2021-03-10 22:32:58,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1222 states to 1222 states and 4265 transitions. [2021-03-10 22:32:58,210 INFO L78 Accepts]: Start accepts. Automaton has 1222 states and 4265 transitions. Word has length 22 [2021-03-10 22:32:58,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:32:58,210 INFO L480 AbstractCegarLoop]: Abstraction has 1222 states and 4265 transitions. [2021-03-10 22:32:58,210 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) [2021-03-10 22:32:58,210 INFO L276 IsEmpty]: Start isEmpty. Operand 1222 states and 4265 transitions. [2021-03-10 22:32:58,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 22:32:58,212 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:32:58,212 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:32:58,420 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-03-10 22:32:58,420 INFO L428 AbstractCegarLoop]: === Iteration 75 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-03-10 22:32:58,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:32:58,421 INFO L82 PathProgramCache]: Analyzing trace with hash 414299473, now seen corresponding path program 40 times [2021-03-10 22:32:58,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:32:58,421 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85130346] [2021-03-10 22:32:58,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:32:58,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:32:58,440 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:58,440 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85130346] [2021-03-10 22:32:58,440 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582684125] [2021-03-10 22:32:58,441 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) [2021-03-10 22:32:58,479 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:32:58,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:32:58,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 22:32:58,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:32:58,525 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:58,525 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:32:58,525 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-03-10 22:32:58,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017242477] [2021-03-10 22:32:58,525 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 22:32:58,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:32:58,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 22:32:58,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-03-10 22:32:58,526 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) [2021-03-10 22:32:58,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:32:58,646 INFO L93 Difference]: Finished difference Result 2184 states and 7117 transitions. [2021-03-10 22:32:58,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:32:58,647 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 [2021-03-10 22:32:58,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:32:58,650 INFO L225 Difference]: With dead ends: 2184 [2021-03-10 22:32:58,650 INFO L226 Difference]: Without dead ends: 2184 [2021-03-10 22:32:58,650 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 65.9ms TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:32:58,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2184 states. [2021-03-10 22:32:58,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2184 to 1282. [2021-03-10 22:32:58,668 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) [2021-03-10 22:32:58,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1282 states to 1282 states and 4519 transitions. [2021-03-10 22:32:58,670 INFO L78 Accepts]: Start accepts. Automaton has 1282 states and 4519 transitions. Word has length 22 [2021-03-10 22:32:58,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:32:58,670 INFO L480 AbstractCegarLoop]: Abstraction has 1282 states and 4519 transitions. [2021-03-10 22:32:58,670 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) [2021-03-10 22:32:58,671 INFO L276 IsEmpty]: Start isEmpty. Operand 1282 states and 4519 transitions. [2021-03-10 22:32:58,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 22:32:58,672 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:32:58,672 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:32:58,887 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:32:58,887 INFO L428 AbstractCegarLoop]: === Iteration 76 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-03-10 22:32:58,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:32:58,887 INFO L82 PathProgramCache]: Analyzing trace with hash -254499376, now seen corresponding path program 41 times [2021-03-10 22:32:58,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:32:58,888 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52238059] [2021-03-10 22:32:58,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:32:58,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:32:58,906 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:58,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52238059] [2021-03-10 22:32:58,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171083683] [2021-03-10 22:32:58,907 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) [2021-03-10 22:32:58,939 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:32:58,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:32:58,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 22:32:58,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:32:58,990 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:58,991 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:32:58,991 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-03-10 22:32:58,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911912971] [2021-03-10 22:32:58,991 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 22:32:58,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:32:58,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 22:32:58,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-03-10 22:32:58,992 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) [2021-03-10 22:32:59,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:32:59,166 INFO L93 Difference]: Finished difference Result 1724 states and 5684 transitions. [2021-03-10 22:32:59,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 22:32:59,166 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 [2021-03-10 22:32:59,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:32:59,168 INFO L225 Difference]: With dead ends: 1724 [2021-03-10 22:32:59,168 INFO L226 Difference]: Without dead ends: 1690 [2021-03-10 22:32:59,168 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 108.5ms TimeCoverageRelationStatistics Valid=168, Invalid=294, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:32:59,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1690 states. [2021-03-10 22:32:59,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1690 to 1281. [2021-03-10 22:32:59,183 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) [2021-03-10 22:32:59,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1281 states to 1281 states and 4499 transitions. [2021-03-10 22:32:59,185 INFO L78 Accepts]: Start accepts. Automaton has 1281 states and 4499 transitions. Word has length 22 [2021-03-10 22:32:59,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:32:59,185 INFO L480 AbstractCegarLoop]: Abstraction has 1281 states and 4499 transitions. [2021-03-10 22:32:59,185 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) [2021-03-10 22:32:59,185 INFO L276 IsEmpty]: Start isEmpty. Operand 1281 states and 4499 transitions. [2021-03-10 22:32:59,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 22:32:59,187 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:32:59,187 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:32:59,388 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-03-10 22:32:59,388 INFO L428 AbstractCegarLoop]: === Iteration 77 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-03-10 22:32:59,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:32:59,388 INFO L82 PathProgramCache]: Analyzing trace with hash -811023835, now seen corresponding path program 42 times [2021-03-10 22:32:59,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:32:59,388 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819998193] [2021-03-10 22:32:59,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:32:59,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:32:59,407 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:59,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819998193] [2021-03-10 22:32:59,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661244653] [2021-03-10 22:32:59,408 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 [2021-03-10 22:32:59,427 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 22:32:59,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:32:59,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 22:32:59,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:32:59,473 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:59,473 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:32:59,473 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-03-10 22:32:59,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872869112] [2021-03-10 22:32:59,474 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 22:32:59,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:32:59,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 22:32:59,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-03-10 22:32:59,474 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) [2021-03-10 22:32:59,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:32:59,678 INFO L93 Difference]: Finished difference Result 2125 states and 6947 transitions. [2021-03-10 22:32:59,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 22:32:59,679 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 [2021-03-10 22:32:59,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:32:59,681 INFO L225 Difference]: With dead ends: 2125 [2021-03-10 22:32:59,681 INFO L226 Difference]: Without dead ends: 2116 [2021-03-10 22:32:59,682 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 120.3ms TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:32:59,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2116 states. [2021-03-10 22:32:59,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2116 to 1245. [2021-03-10 22:32:59,700 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) [2021-03-10 22:32:59,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1245 states to 1245 states and 4336 transitions. [2021-03-10 22:32:59,702 INFO L78 Accepts]: Start accepts. Automaton has 1245 states and 4336 transitions. Word has length 22 [2021-03-10 22:32:59,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:32:59,702 INFO L480 AbstractCegarLoop]: Abstraction has 1245 states and 4336 transitions. [2021-03-10 22:32:59,702 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) [2021-03-10 22:32:59,702 INFO L276 IsEmpty]: Start isEmpty. Operand 1245 states and 4336 transitions. [2021-03-10 22:32:59,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 22:32:59,704 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:32:59,704 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:32:59,918 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable119 [2021-03-10 22:32:59,919 INFO L428 AbstractCegarLoop]: === Iteration 78 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-03-10 22:32:59,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:32:59,919 INFO L82 PathProgramCache]: Analyzing trace with hash -1183450264, now seen corresponding path program 43 times [2021-03-10 22:32:59,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:32:59,919 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558589883] [2021-03-10 22:32:59,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:32:59,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:32:59,938 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:59,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558589883] [2021-03-10 22:32:59,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595055369] [2021-03-10 22:32:59,938 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 [2021-03-10 22:32:59,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:32:59,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 22:32:59,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:33:00,002 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:33:00,003 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:33:00,003 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-03-10 22:33:00,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207733453] [2021-03-10 22:33:00,003 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 22:33:00,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:33:00,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 22:33:00,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-03-10 22:33:00,003 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) [2021-03-10 22:33:00,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:33:00,107 INFO L93 Difference]: Finished difference Result 1497 states and 4889 transitions. [2021-03-10 22:33:00,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:33:00,107 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 [2021-03-10 22:33:00,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:33:00,109 INFO L225 Difference]: With dead ends: 1497 [2021-03-10 22:33:00,109 INFO L226 Difference]: Without dead ends: 1497 [2021-03-10 22:33:00,109 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 69.1ms TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:33:00,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1497 states. [2021-03-10 22:33:00,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1497 to 1200. [2021-03-10 22:33:00,122 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) [2021-03-10 22:33:00,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1200 states to 1200 states and 4117 transitions. [2021-03-10 22:33:00,124 INFO L78 Accepts]: Start accepts. Automaton has 1200 states and 4117 transitions. Word has length 22 [2021-03-10 22:33:00,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:33:00,124 INFO L480 AbstractCegarLoop]: Abstraction has 1200 states and 4117 transitions. [2021-03-10 22:33:00,124 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) [2021-03-10 22:33:00,124 INFO L276 IsEmpty]: Start isEmpty. Operand 1200 states and 4117 transitions. [2021-03-10 22:33:00,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 22:33:00,126 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:33:00,126 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:33:00,326 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:33:00,326 INFO L428 AbstractCegarLoop]: === Iteration 79 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-03-10 22:33:00,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:33:00,326 INFO L82 PathProgramCache]: Analyzing trace with hash -496279263, now seen corresponding path program 44 times [2021-03-10 22:33:00,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:33:00,327 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492597105] [2021-03-10 22:33:00,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:33:00,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:33:00,366 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:33:00,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492597105] [2021-03-10 22:33:00,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319468898] [2021-03-10 22:33:00,366 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) [2021-03-10 22:33:00,390 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:33:00,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:33:00,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 22:33:00,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:33:00,443 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:33:00,443 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:33:00,443 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-03-10 22:33:00,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073353862] [2021-03-10 22:33:00,444 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 22:33:00,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:33:00,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 22:33:00,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-03-10 22:33:00,444 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) [2021-03-10 22:33:00,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:33:00,573 INFO L93 Difference]: Finished difference Result 1698 states and 5519 transitions. [2021-03-10 22:33:00,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:33:00,574 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 [2021-03-10 22:33:00,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:33:00,576 INFO L225 Difference]: With dead ends: 1698 [2021-03-10 22:33:00,576 INFO L226 Difference]: Without dead ends: 1690 [2021-03-10 22:33:00,576 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 101.6ms TimeCoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:33:00,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1690 states. [2021-03-10 22:33:00,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1690 to 1200. [2021-03-10 22:33:00,591 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) [2021-03-10 22:33:00,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1200 states to 1200 states and 4111 transitions. [2021-03-10 22:33:00,593 INFO L78 Accepts]: Start accepts. Automaton has 1200 states and 4111 transitions. Word has length 22 [2021-03-10 22:33:00,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:33:00,593 INFO L480 AbstractCegarLoop]: Abstraction has 1200 states and 4111 transitions. [2021-03-10 22:33:00,593 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) [2021-03-10 22:33:00,593 INFO L276 IsEmpty]: Start isEmpty. Operand 1200 states and 4111 transitions. [2021-03-10 22:33:00,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 22:33:00,595 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:33:00,595 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:33:00,807 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:33:00,807 INFO L428 AbstractCegarLoop]: === Iteration 80 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-03-10 22:33:00,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:33:00,807 INFO L82 PathProgramCache]: Analyzing trace with hash -1029973939, now seen corresponding path program 45 times [2021-03-10 22:33:00,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:33:00,807 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65593834] [2021-03-10 22:33:00,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:33:00,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:33:00,826 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:33:00,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65593834] [2021-03-10 22:33:00,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461941815] [2021-03-10 22:33:00,827 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 [2021-03-10 22:33:00,847 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:33:00,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:33:00,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 22:33:00,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:33:00,889 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:33:00,889 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:33:00,889 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-03-10 22:33:00,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290219256] [2021-03-10 22:33:00,889 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 22:33:00,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:33:00,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 22:33:00,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-03-10 22:33:00,889 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) [2021-03-10 22:33:00,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:33:00,959 INFO L93 Difference]: Finished difference Result 1428 states and 4807 transitions. [2021-03-10 22:33:00,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 22:33:00,960 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 [2021-03-10 22:33:00,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:33:00,961 INFO L225 Difference]: With dead ends: 1428 [2021-03-10 22:33:00,961 INFO L226 Difference]: Without dead ends: 1419 [2021-03-10 22:33:00,962 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 52.6ms TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:33:00,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1419 states. [2021-03-10 22:33:00,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1419 to 1199. [2021-03-10 22:33:00,973 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) [2021-03-10 22:33:00,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1199 states to 1199 states and 4109 transitions. [2021-03-10 22:33:00,975 INFO L78 Accepts]: Start accepts. Automaton has 1199 states and 4109 transitions. Word has length 22 [2021-03-10 22:33:00,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:33:00,975 INFO L480 AbstractCegarLoop]: Abstraction has 1199 states and 4109 transitions. [2021-03-10 22:33:00,975 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) [2021-03-10 22:33:00,975 INFO L276 IsEmpty]: Start isEmpty. Operand 1199 states and 4109 transitions. [2021-03-10 22:33:00,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 22:33:00,977 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:33:00,977 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:33:01,183 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-03-10 22:33:01,183 INFO L428 AbstractCegarLoop]: === Iteration 81 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-03-10 22:33:01,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:33:01,183 INFO L82 PathProgramCache]: Analyzing trace with hash -736606674, now seen corresponding path program 46 times [2021-03-10 22:33:01,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:33:01,183 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327368007] [2021-03-10 22:33:01,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:33:01,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:33:01,205 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:33:01,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327368007] [2021-03-10 22:33:01,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412517604] [2021-03-10 22:33:01,206 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 [2021-03-10 22:33:01,225 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:33:01,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:33:01,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 22:33:01,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:33:01,270 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:33:01,270 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:33:01,270 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-03-10 22:33:01,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489729967] [2021-03-10 22:33:01,271 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 22:33:01,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:33:01,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 22:33:01,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-03-10 22:33:01,271 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) [2021-03-10 22:33:01,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:33:01,331 INFO L93 Difference]: Finished difference Result 1470 states and 4948 transitions. [2021-03-10 22:33:01,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 22:33:01,331 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 [2021-03-10 22:33:01,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:33:01,333 INFO L225 Difference]: With dead ends: 1470 [2021-03-10 22:33:01,333 INFO L226 Difference]: Without dead ends: 1470 [2021-03-10 22:33:01,333 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 41.5ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:33:01,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1470 states. [2021-03-10 22:33:01,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1470 to 1208. [2021-03-10 22:33:01,345 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) [2021-03-10 22:33:01,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1208 states to 1208 states and 4143 transitions. [2021-03-10 22:33:01,347 INFO L78 Accepts]: Start accepts. Automaton has 1208 states and 4143 transitions. Word has length 22 [2021-03-10 22:33:01,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:33:01,347 INFO L480 AbstractCegarLoop]: Abstraction has 1208 states and 4143 transitions. [2021-03-10 22:33:01,347 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) [2021-03-10 22:33:01,347 INFO L276 IsEmpty]: Start isEmpty. Operand 1208 states and 4143 transitions. [2021-03-10 22:33:01,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 22:33:01,349 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:33:01,349 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:33:01,549 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-03-10 22:33:01,549 INFO L428 AbstractCegarLoop]: === Iteration 82 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-03-10 22:33:01,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:33:01,549 INFO L82 PathProgramCache]: Analyzing trace with hash -834579384, now seen corresponding path program 47 times [2021-03-10 22:33:01,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:33:01,549 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299781164] [2021-03-10 22:33:01,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:33:01,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:33:01,736 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:33:01,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299781164] [2021-03-10 22:33:01,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435449244] [2021-03-10 22:33:01,736 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 22:33:01,757 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:33:01,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:33:01,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:33:01,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:33:01,909 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 [2021-03-10 22:33:01,910 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:33:01,911 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:33:01,911 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:33:01,911 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-03-10 22:33:01,940 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:33:01,941 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:33:01,941 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-03-10 22:33:01,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196251075] [2021-03-10 22:33:01,941 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:33:01,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:33:01,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:33:01,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:33:01,941 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) [2021-03-10 22:33:05,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:33:05,487 INFO L93 Difference]: Finished difference Result 4448 states and 15165 transitions. [2021-03-10 22:33:05,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-03-10 22:33:05,487 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 [2021-03-10 22:33:05,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:33:05,493 INFO L225 Difference]: With dead ends: 4448 [2021-03-10 22:33:05,494 INFO L226 Difference]: Without dead ends: 4426 [2021-03-10 22:33:05,494 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2192 ImplicationChecksByTransitivity, 2762.8ms TimeCoverageRelationStatistics Valid=1022, Invalid=5620, Unknown=0, NotChecked=0, Total=6642 [2021-03-10 22:33:05,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4426 states. [2021-03-10 22:33:05,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4426 to 1303. [2021-03-10 22:33:05,520 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) [2021-03-10 22:33:05,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1303 states to 1303 states and 4479 transitions. [2021-03-10 22:33:05,523 INFO L78 Accepts]: Start accepts. Automaton has 1303 states and 4479 transitions. Word has length 24 [2021-03-10 22:33:05,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:33:05,523 INFO L480 AbstractCegarLoop]: Abstraction has 1303 states and 4479 transitions. [2021-03-10 22:33:05,523 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) [2021-03-10 22:33:05,523 INFO L276 IsEmpty]: Start isEmpty. Operand 1303 states and 4479 transitions. [2021-03-10 22:33:05,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 22:33:05,525 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:33:05,525 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:33:05,739 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-03-10 22:33:05,739 INFO L428 AbstractCegarLoop]: === Iteration 83 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-03-10 22:33:05,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:33:05,739 INFO L82 PathProgramCache]: Analyzing trace with hash 965720304, now seen corresponding path program 48 times [2021-03-10 22:33:05,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:33:05,739 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009973338] [2021-03-10 22:33:05,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:33:05,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:33:05,946 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:33:05,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009973338] [2021-03-10 22:33:05,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503849052] [2021-03-10 22:33:05,946 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 [2021-03-10 22:33:05,967 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:33:05,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:33:05,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 22:33:05,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:33:06,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 22:33:06,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 22:33:06,154 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:33:06,154 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 [2021-03-10 22:33:06,171 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:33:06,203 INFO L628 ElimStorePlain]: treesize reduction 48, result has 42.9 percent of original size [2021-03-10 22:33:06,218 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:33:06,218 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:41 [2021-03-10 22:33:06,314 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:33:06,314 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:33:06,314 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 21 [2021-03-10 22:33:06,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338009775] [2021-03-10 22:33:06,315 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 22:33:06,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:33:06,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 22:33:06,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:33:06,315 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) [2021-03-10 22:33:09,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:33:09,238 INFO L93 Difference]: Finished difference Result 2829 states and 9372 transitions. [2021-03-10 22:33:09,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-03-10 22:33:09,239 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 [2021-03-10 22:33:09,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:33:09,243 INFO L225 Difference]: With dead ends: 2829 [2021-03-10 22:33:09,243 INFO L226 Difference]: Without dead ends: 2799 [2021-03-10 22:33:09,243 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1118 ImplicationChecksByTransitivity, 2376.1ms TimeCoverageRelationStatistics Valid=661, Invalid=3121, Unknown=0, NotChecked=0, Total=3782 [2021-03-10 22:33:09,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2799 states. [2021-03-10 22:33:09,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2799 to 1316. [2021-03-10 22:33:09,262 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) [2021-03-10 22:33:09,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1316 states to 1316 states and 4524 transitions. [2021-03-10 22:33:09,264 INFO L78 Accepts]: Start accepts. Automaton has 1316 states and 4524 transitions. Word has length 24 [2021-03-10 22:33:09,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:33:09,264 INFO L480 AbstractCegarLoop]: Abstraction has 1316 states and 4524 transitions. [2021-03-10 22:33:09,264 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) [2021-03-10 22:33:09,264 INFO L276 IsEmpty]: Start isEmpty. Operand 1316 states and 4524 transitions. [2021-03-10 22:33:09,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 22:33:09,266 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:33:09,266 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:33:09,466 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-03-10 22:33:09,467 INFO L428 AbstractCegarLoop]: === Iteration 84 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-03-10 22:33:09,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:33:09,467 INFO L82 PathProgramCache]: Analyzing trace with hash -1186871304, now seen corresponding path program 49 times [2021-03-10 22:33:09,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:33:09,467 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712864105] [2021-03-10 22:33:09,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:33:09,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:33:09,670 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:33:09,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712864105] [2021-03-10 22:33:09,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773134283] [2021-03-10 22:33:09,670 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 [2021-03-10 22:33:09,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:33:09,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:33:09,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:33:09,843 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 [2021-03-10 22:33:09,844 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:33:09,845 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:33:09,845 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:33:09,845 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-03-10 22:33:09,875 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:33:09,875 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:33:09,876 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-03-10 22:33:09,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168962641] [2021-03-10 22:33:09,876 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:33:09,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:33:09,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:33:09,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:33:09,876 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) [2021-03-10 22:33:11,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:33:11,645 INFO L93 Difference]: Finished difference Result 2754 states and 9152 transitions. [2021-03-10 22:33:11,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-03-10 22:33:11,645 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 [2021-03-10 22:33:11,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:33:11,649 INFO L225 Difference]: With dead ends: 2754 [2021-03-10 22:33:11,649 INFO L226 Difference]: Without dead ends: 2720 [2021-03-10 22:33:11,649 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 621 ImplicationChecksByTransitivity, 1337.0ms TimeCoverageRelationStatistics Valid=379, Invalid=2171, Unknown=0, NotChecked=0, Total=2550 [2021-03-10 22:33:11,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2720 states. [2021-03-10 22:33:11,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2720 to 1330. [2021-03-10 22:33:11,668 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) [2021-03-10 22:33:11,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1330 states to 1330 states and 4576 transitions. [2021-03-10 22:33:11,670 INFO L78 Accepts]: Start accepts. Automaton has 1330 states and 4576 transitions. Word has length 24 [2021-03-10 22:33:11,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:33:11,670 INFO L480 AbstractCegarLoop]: Abstraction has 1330 states and 4576 transitions. [2021-03-10 22:33:11,670 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) [2021-03-10 22:33:11,670 INFO L276 IsEmpty]: Start isEmpty. Operand 1330 states and 4576 transitions. [2021-03-10 22:33:11,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 22:33:11,672 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:33:11,672 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:33:11,872 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-03-10 22:33:11,873 INFO L428 AbstractCegarLoop]: === Iteration 85 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-03-10 22:33:11,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:33:11,873 INFO L82 PathProgramCache]: Analyzing trace with hash 749372208, now seen corresponding path program 50 times [2021-03-10 22:33:11,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:33:11,873 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362697388] [2021-03-10 22:33:11,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:33:11,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:33:12,063 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:33:12,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362697388] [2021-03-10 22:33:12,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879908161] [2021-03-10 22:33:12,064 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 [2021-03-10 22:33:12,085 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:33:12,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:33:12,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 22:33:12,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:33:12,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 22:33:12,276 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:33:12,277 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 [2021-03-10 22:33:12,281 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:33:12,312 INFO L628 ElimStorePlain]: treesize reduction 29, result has 50.8 percent of original size [2021-03-10 22:33:12,314 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:33:12,315 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:32 [2021-03-10 22:33:12,377 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:33:12,377 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:33:12,378 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-03-10 22:33:12,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839395951] [2021-03-10 22:33:12,378 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 22:33:12,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:33:12,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 22:33:12,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:33:12,378 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) [2021-03-10 22:33:14,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:33:14,128 INFO L93 Difference]: Finished difference Result 2600 states and 8701 transitions. [2021-03-10 22:33:14,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-03-10 22:33:14,129 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 [2021-03-10 22:33:14,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:33:14,132 INFO L225 Difference]: With dead ends: 2600 [2021-03-10 22:33:14,132 INFO L226 Difference]: Without dead ends: 2578 [2021-03-10 22:33:14,133 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 748 ImplicationChecksByTransitivity, 1401.2ms TimeCoverageRelationStatistics Valid=457, Invalid=2299, Unknown=0, NotChecked=0, Total=2756 [2021-03-10 22:33:14,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2578 states. [2021-03-10 22:33:14,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2578 to 1330. [2021-03-10 22:33:14,150 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) [2021-03-10 22:33:14,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1330 states to 1330 states and 4584 transitions. [2021-03-10 22:33:14,153 INFO L78 Accepts]: Start accepts. Automaton has 1330 states and 4584 transitions. Word has length 24 [2021-03-10 22:33:14,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:33:14,153 INFO L480 AbstractCegarLoop]: Abstraction has 1330 states and 4584 transitions. [2021-03-10 22:33:14,153 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) [2021-03-10 22:33:14,153 INFO L276 IsEmpty]: Start isEmpty. Operand 1330 states and 4584 transitions. [2021-03-10 22:33:14,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 22:33:14,155 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:33:14,155 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:33:14,355 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:33:14,355 INFO L428 AbstractCegarLoop]: === Iteration 86 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-03-10 22:33:14,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:33:14,355 INFO L82 PathProgramCache]: Analyzing trace with hash 572830776, now seen corresponding path program 51 times [2021-03-10 22:33:14,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:33:14,355 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601102679] [2021-03-10 22:33:14,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:33:14,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:33:14,544 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:33:14,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601102679] [2021-03-10 22:33:14,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961850758] [2021-03-10 22:33:14,544 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 [2021-03-10 22:33:14,574 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 22:33:14,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:33:14,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:33:14,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:33:14,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 22:33:14,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 22:33:14,735 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:33:14,735 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 [2021-03-10 22:33:14,736 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:33:14,754 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:33:14,754 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:33:14,754 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:50 [2021-03-10 22:33:14,926 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:33:14,926 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:33:14,926 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-03-10 22:33:14,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570592732] [2021-03-10 22:33:14,926 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 22:33:14,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:33:14,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 22:33:14,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:33:14,927 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) [2021-03-10 22:33:16,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:33:16,779 INFO L93 Difference]: Finished difference Result 2457 states and 8209 transitions. [2021-03-10 22:33:16,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-03-10 22:33:16,779 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 [2021-03-10 22:33:16,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:33:16,783 INFO L225 Difference]: With dead ends: 2457 [2021-03-10 22:33:16,783 INFO L226 Difference]: Without dead ends: 2437 [2021-03-10 22:33:16,783 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 882 ImplicationChecksByTransitivity, 1600.8ms TimeCoverageRelationStatistics Valid=478, Invalid=2602, Unknown=0, NotChecked=0, Total=3080 [2021-03-10 22:33:16,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2437 states. [2021-03-10 22:33:16,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2437 to 1338. [2021-03-10 22:33:16,807 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) [2021-03-10 22:33:16,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1338 states to 1338 states and 4603 transitions. [2021-03-10 22:33:16,809 INFO L78 Accepts]: Start accepts. Automaton has 1338 states and 4603 transitions. Word has length 24 [2021-03-10 22:33:16,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:33:16,809 INFO L480 AbstractCegarLoop]: Abstraction has 1338 states and 4603 transitions. [2021-03-10 22:33:16,809 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) [2021-03-10 22:33:16,809 INFO L276 IsEmpty]: Start isEmpty. Operand 1338 states and 4603 transitions. [2021-03-10 22:33:16,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 22:33:16,811 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:33:16,811 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:33:17,011 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2021-03-10 22:33:17,011 INFO L428 AbstractCegarLoop]: === Iteration 87 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-03-10 22:33:17,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:33:17,012 INFO L82 PathProgramCache]: Analyzing trace with hash -260907664, now seen corresponding path program 52 times [2021-03-10 22:33:17,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:33:17,012 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671806666] [2021-03-10 22:33:17,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:33:17,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:33:17,220 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:33:17,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671806666] [2021-03-10 22:33:17,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147472918] [2021-03-10 22:33:17,220 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 [2021-03-10 22:33:17,243 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:33:17,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:33:17,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:33:17,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:33:17,368 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 [2021-03-10 22:33:17,369 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:33:17,372 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:33:17,372 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:33:17,372 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-03-10 22:33:17,421 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:33:17,421 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:33:17,421 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-03-10 22:33:17,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650796970] [2021-03-10 22:33:17,421 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 22:33:17,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:33:17,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 22:33:17,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:33:17,421 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) [2021-03-10 22:33:18,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:33:18,420 INFO L93 Difference]: Finished difference Result 2445 states and 8230 transitions. [2021-03-10 22:33:18,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-03-10 22:33:18,421 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 [2021-03-10 22:33:18,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:33:18,424 INFO L225 Difference]: With dead ends: 2445 [2021-03-10 22:33:18,424 INFO L226 Difference]: Without dead ends: 2434 [2021-03-10 22:33:18,424 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 841.4ms TimeCoverageRelationStatistics Valid=271, Invalid=1451, Unknown=0, NotChecked=0, Total=1722 [2021-03-10 22:33:18,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2434 states. [2021-03-10 22:33:18,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2434 to 1337. [2021-03-10 22:33:18,440 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) [2021-03-10 22:33:18,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1337 states to 1337 states and 4606 transitions. [2021-03-10 22:33:18,443 INFO L78 Accepts]: Start accepts. Automaton has 1337 states and 4606 transitions. Word has length 24 [2021-03-10 22:33:18,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:33:18,443 INFO L480 AbstractCegarLoop]: Abstraction has 1337 states and 4606 transitions. [2021-03-10 22:33:18,443 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) [2021-03-10 22:33:18,443 INFO L276 IsEmpty]: Start isEmpty. Operand 1337 states and 4606 transitions. [2021-03-10 22:33:18,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 22:33:18,444 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:33:18,444 INFO L519 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] [2021-03-10 22:33:18,645 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:33:18,645 INFO L428 AbstractCegarLoop]: === Iteration 88 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-03-10 22:33:18,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:33:18,645 INFO L82 PathProgramCache]: Analyzing trace with hash 1760921938, now seen corresponding path program 1 times [2021-03-10 22:33:18,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:33:18,645 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670741869] [2021-03-10 22:33:18,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:33:18,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:33:18,824 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:33:18,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670741869] [2021-03-10 22:33:18,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132240655] [2021-03-10 22:33:18,824 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 [2021-03-10 22:33:18,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:33:18,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:33:18,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:33:19,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2021-03-10 22:33:19,033 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:33:19,035 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:33:19,035 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:33:19,035 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-03-10 22:33:19,067 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:33:19,067 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:33:19,067 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-03-10 22:33:19,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402813375] [2021-03-10 22:33:19,067 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:33:19,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:33:19,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:33:19,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:33:19,068 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) [2021-03-10 22:33:22,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:33:22,407 INFO L93 Difference]: Finished difference Result 3789 states and 12976 transitions. [2021-03-10 22:33:22,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-03-10 22:33:22,407 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 [2021-03-10 22:33:22,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:33:22,413 INFO L225 Difference]: With dead ends: 3789 [2021-03-10 22:33:22,413 INFO L226 Difference]: Without dead ends: 3770 [2021-03-10 22:33:22,413 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1512 ImplicationChecksByTransitivity, 2548.7ms TimeCoverageRelationStatistics Valid=761, Invalid=4351, Unknown=0, NotChecked=0, Total=5112 [2021-03-10 22:33:22,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3770 states. [2021-03-10 22:33:22,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3770 to 1372. [2021-03-10 22:33:22,436 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) [2021-03-10 22:33:22,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1372 states to 1372 states and 4739 transitions. [2021-03-10 22:33:22,439 INFO L78 Accepts]: Start accepts. Automaton has 1372 states and 4739 transitions. Word has length 24 [2021-03-10 22:33:22,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:33:22,439 INFO L480 AbstractCegarLoop]: Abstraction has 1372 states and 4739 transitions. [2021-03-10 22:33:22,439 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) [2021-03-10 22:33:22,439 INFO L276 IsEmpty]: Start isEmpty. Operand 1372 states and 4739 transitions. [2021-03-10 22:33:22,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 22:33:22,441 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:33:22,441 INFO L519 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] [2021-03-10 22:33:22,641 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-03-10 22:33:22,641 INFO L428 AbstractCegarLoop]: === Iteration 89 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-03-10 22:33:22,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:33:22,641 INFO L82 PathProgramCache]: Analyzing trace with hash 1251406074, now seen corresponding path program 2 times [2021-03-10 22:33:22,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:33:22,642 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864829720] [2021-03-10 22:33:22,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:33:22,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:33:22,837 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:33:22,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864829720] [2021-03-10 22:33:22,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392112801] [2021-03-10 22:33:22,837 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 [2021-03-10 22:33:22,859 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:33:22,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:33:22,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-10 22:33:22,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:33:23,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 22:33:23,089 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:33:23,090 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 [2021-03-10 22:33:23,090 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:33:23,094 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:33:23,095 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:33:23,095 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-03-10 22:33:23,128 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:33:23,128 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:33:23,128 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-03-10 22:33:23,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007781365] [2021-03-10 22:33:23,129 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 22:33:23,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:33:23,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 22:33:23,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:33:23,129 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) [2021-03-10 22:33:24,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:33:24,737 INFO L93 Difference]: Finished difference Result 2341 states and 7957 transitions. [2021-03-10 22:33:24,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-03-10 22:33:24,737 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 [2021-03-10 22:33:24,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:33:24,741 INFO L225 Difference]: With dead ends: 2341 [2021-03-10 22:33:24,741 INFO L226 Difference]: Without dead ends: 2332 [2021-03-10 22:33:24,741 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 645 ImplicationChecksByTransitivity, 1327.6ms TimeCoverageRelationStatistics Valid=376, Invalid=2276, Unknown=0, NotChecked=0, Total=2652 [2021-03-10 22:33:24,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2332 states. [2021-03-10 22:33:24,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2332 to 1382. [2021-03-10 22:33:24,757 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) [2021-03-10 22:33:24,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1382 states to 1382 states and 4775 transitions. [2021-03-10 22:33:24,759 INFO L78 Accepts]: Start accepts. Automaton has 1382 states and 4775 transitions. Word has length 24 [2021-03-10 22:33:24,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:33:24,759 INFO L480 AbstractCegarLoop]: Abstraction has 1382 states and 4775 transitions. [2021-03-10 22:33:24,760 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) [2021-03-10 22:33:24,760 INFO L276 IsEmpty]: Start isEmpty. Operand 1382 states and 4775 transitions. [2021-03-10 22:33:24,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 22:33:24,761 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:33:24,761 INFO L519 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] [2021-03-10 22:33:24,962 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-03-10 22:33:24,962 INFO L428 AbstractCegarLoop]: === Iteration 90 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-03-10 22:33:24,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:33:24,962 INFO L82 PathProgramCache]: Analyzing trace with hash 1041868694, now seen corresponding path program 3 times [2021-03-10 22:33:24,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:33:24,962 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008981237] [2021-03-10 22:33:24,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:33:24,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:33:25,192 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:33:25,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008981237] [2021-03-10 22:33:25,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936808816] [2021-03-10 22:33:25,193 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 [2021-03-10 22:33:25,214 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:33:25,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:33:25,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:33:25,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:33:25,374 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 20 treesize of output 12 [2021-03-10 22:33:25,375 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:33:25,376 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:33:25,377 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:33:25,377 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-03-10 22:33:25,407 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:33:25,407 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:33:25,407 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-03-10 22:33:25,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170951534] [2021-03-10 22:33:25,408 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:33:25,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:33:25,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:33:25,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:33:25,408 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) [2021-03-10 22:33:27,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:33:27,172 INFO L93 Difference]: Finished difference Result 2522 states and 8473 transitions. [2021-03-10 22:33:27,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-03-10 22:33:27,172 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 [2021-03-10 22:33:27,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:33:27,176 INFO L225 Difference]: With dead ends: 2522 [2021-03-10 22:33:27,176 INFO L226 Difference]: Without dead ends: 2493 [2021-03-10 22:33:27,176 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 566 ImplicationChecksByTransitivity, 1271.6ms TimeCoverageRelationStatistics Valid=348, Invalid=2004, Unknown=0, NotChecked=0, Total=2352 [2021-03-10 22:33:27,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2493 states. [2021-03-10 22:33:27,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2493 to 1392. [2021-03-10 22:33:27,195 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) [2021-03-10 22:33:27,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1392 states to 1392 states and 4814 transitions. [2021-03-10 22:33:27,198 INFO L78 Accepts]: Start accepts. Automaton has 1392 states and 4814 transitions. Word has length 24 [2021-03-10 22:33:27,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:33:27,198 INFO L480 AbstractCegarLoop]: Abstraction has 1392 states and 4814 transitions. [2021-03-10 22:33:27,198 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) [2021-03-10 22:33:27,198 INFO L276 IsEmpty]: Start isEmpty. Operand 1392 states and 4814 transitions. [2021-03-10 22:33:27,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 22:33:27,200 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:33:27,200 INFO L519 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] [2021-03-10 22:33:27,400 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-03-10 22:33:27,400 INFO L428 AbstractCegarLoop]: === Iteration 91 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-03-10 22:33:27,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:33:27,401 INFO L82 PathProgramCache]: Analyzing trace with hash -1524426856, now seen corresponding path program 4 times [2021-03-10 22:33:27,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:33:27,401 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880734607] [2021-03-10 22:33:27,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:33:27,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:33:27,624 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:33:27,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880734607] [2021-03-10 22:33:27,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439914044] [2021-03-10 22:33:27,624 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 [2021-03-10 22:33:27,645 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:33:27,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:33:27,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:33:27,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:33:27,794 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 [2021-03-10 22:33:27,795 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:33:27,797 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:33:27,797 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:33:27,797 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-03-10 22:33:27,826 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:33:27,827 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:33:27,827 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-03-10 22:33:27,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318483741] [2021-03-10 22:33:27,827 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:33:27,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:33:27,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:33:27,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:33:27,827 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) [2021-03-10 22:33:29,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:33:29,319 INFO L93 Difference]: Finished difference Result 2457 states and 8279 transitions. [2021-03-10 22:33:29,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-03-10 22:33:29,319 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 [2021-03-10 22:33:29,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:33:29,323 INFO L225 Difference]: With dead ends: 2457 [2021-03-10 22:33:29,323 INFO L226 Difference]: Without dead ends: 2428 [2021-03-10 22:33:29,323 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 549 ImplicationChecksByTransitivity, 1208.5ms TimeCoverageRelationStatistics Valid=348, Invalid=1908, Unknown=0, NotChecked=0, Total=2256 [2021-03-10 22:33:29,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2428 states. [2021-03-10 22:33:29,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2428 to 1386. [2021-03-10 22:33:29,340 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) [2021-03-10 22:33:29,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1386 states to 1386 states and 4799 transitions. [2021-03-10 22:33:29,343 INFO L78 Accepts]: Start accepts. Automaton has 1386 states and 4799 transitions. Word has length 24 [2021-03-10 22:33:29,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:33:29,343 INFO L480 AbstractCegarLoop]: Abstraction has 1386 states and 4799 transitions. [2021-03-10 22:33:29,343 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) [2021-03-10 22:33:29,343 INFO L276 IsEmpty]: Start isEmpty. Operand 1386 states and 4799 transitions. [2021-03-10 22:33:29,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 22:33:29,345 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:33:29,345 INFO L519 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] [2021-03-10 22:33:29,545 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:33:29,545 INFO L428 AbstractCegarLoop]: === Iteration 92 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-03-10 22:33:29,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:33:29,545 INFO L82 PathProgramCache]: Analyzing trace with hash 1742390580, now seen corresponding path program 5 times [2021-03-10 22:33:29,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:33:29,546 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88957500] [2021-03-10 22:33:29,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:33:29,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:33:29,736 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:33:29,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88957500] [2021-03-10 22:33:29,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492410659] [2021-03-10 22:33:29,736 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 22:33:29,758 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:33:29,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:33:29,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:33:29,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:33:29,890 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 [2021-03-10 22:33:29,892 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:33:29,894 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:33:29,895 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:33:29,895 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-03-10 22:33:29,943 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:33:29,943 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:33:29,943 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-03-10 22:33:29,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068017684] [2021-03-10 22:33:29,943 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 22:33:29,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:33:29,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 22:33:29,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:33:29,943 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) [2021-03-10 22:33:30,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:33:30,890 INFO L93 Difference]: Finished difference Result 2282 states and 7774 transitions. [2021-03-10 22:33:30,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 22:33:30,890 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 [2021-03-10 22:33:30,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:33:30,894 INFO L225 Difference]: With dead ends: 2282 [2021-03-10 22:33:30,894 INFO L226 Difference]: Without dead ends: 2273 [2021-03-10 22:33:30,894 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 682.2ms TimeCoverageRelationStatistics Valid=210, Invalid=1050, Unknown=0, NotChecked=0, Total=1260 [2021-03-10 22:33:30,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2273 states. [2021-03-10 22:33:30,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2273 to 1399. [2021-03-10 22:33:30,916 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) [2021-03-10 22:33:30,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1399 states to 1399 states and 4839 transitions. [2021-03-10 22:33:30,918 INFO L78 Accepts]: Start accepts. Automaton has 1399 states and 4839 transitions. Word has length 24 [2021-03-10 22:33:30,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:33:30,918 INFO L480 AbstractCegarLoop]: Abstraction has 1399 states and 4839 transitions. [2021-03-10 22:33:30,918 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) [2021-03-10 22:33:30,918 INFO L276 IsEmpty]: Start isEmpty. Operand 1399 states and 4839 transitions. [2021-03-10 22:33:30,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 22:33:30,920 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:33:30,920 INFO L519 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] [2021-03-10 22:33:31,120 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2021-03-10 22:33:31,121 INFO L428 AbstractCegarLoop]: === Iteration 93 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-03-10 22:33:31,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:33:31,121 INFO L82 PathProgramCache]: Analyzing trace with hash 2065976758, now seen corresponding path program 6 times [2021-03-10 22:33:31,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:33:31,121 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695577682] [2021-03-10 22:33:31,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:33:31,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:33:31,329 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:33:31,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695577682] [2021-03-10 22:33:31,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595656402] [2021-03-10 22:33:31,330 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) [2021-03-10 22:33:31,367 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:33:31,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:33:31,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 22:33:31,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:33:31,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 22:33:31,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 22:33:31,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 22:33:31,560 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:33:31,560 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 [2021-03-10 22:33:31,561 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:33:31,578 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:33:31,586 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:33:31,586 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:88 [2021-03-10 22:33:31,705 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:33:31,705 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:33:31,706 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-03-10 22:33:31,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897333420] [2021-03-10 22:33:31,706 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 22:33:31,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:33:31,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 22:33:31,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:33:31,706 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) [2021-03-10 22:33:33,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:33:33,593 INFO L93 Difference]: Finished difference Result 2270 states and 7714 transitions. [2021-03-10 22:33:33,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-03-10 22:33:33,594 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 [2021-03-10 22:33:33,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:33:33,597 INFO L225 Difference]: With dead ends: 2270 [2021-03-10 22:33:33,597 INFO L226 Difference]: Without dead ends: 2261 [2021-03-10 22:33:33,597 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 737 ImplicationChecksByTransitivity, 1749.9ms TimeCoverageRelationStatistics Valid=540, Invalid=2322, Unknown=0, NotChecked=0, Total=2862 [2021-03-10 22:33:33,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2261 states. [2021-03-10 22:33:33,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2261 to 1402. [2021-03-10 22:33:33,613 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) [2021-03-10 22:33:33,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1402 states to 1402 states and 4852 transitions. [2021-03-10 22:33:33,616 INFO L78 Accepts]: Start accepts. Automaton has 1402 states and 4852 transitions. Word has length 24 [2021-03-10 22:33:33,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:33:33,616 INFO L480 AbstractCegarLoop]: Abstraction has 1402 states and 4852 transitions. [2021-03-10 22:33:33,616 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) [2021-03-10 22:33:33,616 INFO L276 IsEmpty]: Start isEmpty. Operand 1402 states and 4852 transitions. [2021-03-10 22:33:33,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 22:33:33,618 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:33:33,618 INFO L519 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] [2021-03-10 22:33:33,818 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:33:33,818 INFO L428 AbstractCegarLoop]: === Iteration 94 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-03-10 22:33:33,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:33:33,818 INFO L82 PathProgramCache]: Analyzing trace with hash -543246416, now seen corresponding path program 7 times [2021-03-10 22:33:33,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:33:33,818 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5692106] [2021-03-10 22:33:33,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:33:33,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:33:33,976 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:33:33,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5692106] [2021-03-10 22:33:33,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446658774] [2021-03-10 22:33:33,977 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 [2021-03-10 22:33:33,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:33:33,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:33:33,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:33:34,126 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 [2021-03-10 22:33:34,127 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:33:34,130 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:33:34,131 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:33:34,131 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-03-10 22:33:34,181 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:33:34,181 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:33:34,181 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-03-10 22:33:34,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635783475] [2021-03-10 22:33:34,181 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 22:33:34,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:33:34,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 22:33:34,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:33:34,181 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) [2021-03-10 22:33:35,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:33:35,109 INFO L93 Difference]: Finished difference Result 2225 states and 7584 transitions. [2021-03-10 22:33:35,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 22:33:35,110 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 [2021-03-10 22:33:35,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:33:35,112 INFO L225 Difference]: With dead ends: 2225 [2021-03-10 22:33:35,112 INFO L226 Difference]: Without dead ends: 2214 [2021-03-10 22:33:35,113 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 663.1ms TimeCoverageRelationStatistics Valid=178, Invalid=1012, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 22:33:35,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2214 states. [2021-03-10 22:33:35,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2214 to 1394. [2021-03-10 22:33:35,128 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) [2021-03-10 22:33:35,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1394 states to 1394 states and 4826 transitions. [2021-03-10 22:33:35,130 INFO L78 Accepts]: Start accepts. Automaton has 1394 states and 4826 transitions. Word has length 24 [2021-03-10 22:33:35,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:33:35,131 INFO L480 AbstractCegarLoop]: Abstraction has 1394 states and 4826 transitions. [2021-03-10 22:33:35,131 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) [2021-03-10 22:33:35,131 INFO L276 IsEmpty]: Start isEmpty. Operand 1394 states and 4826 transitions. [2021-03-10 22:33:35,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 22:33:35,132 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:33:35,133 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:33:35,343 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2021-03-10 22:33:35,343 INFO L428 AbstractCegarLoop]: === Iteration 95 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-03-10 22:33:35,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:33:35,343 INFO L82 PathProgramCache]: Analyzing trace with hash 1059751936, now seen corresponding path program 53 times [2021-03-10 22:33:35,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:33:35,343 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103597348] [2021-03-10 22:33:35,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:33:35,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:33:35,541 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:33:35,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103597348] [2021-03-10 22:33:35,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230391436] [2021-03-10 22:33:35,541 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 [2021-03-10 22:33:35,562 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:33:35,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:33:35,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:33:35,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:33:35,721 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 [2021-03-10 22:33:35,722 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:33:35,723 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:33:35,724 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:33:35,724 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-03-10 22:33:35,756 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:33:35,756 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:33:35,756 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-03-10 22:33:35,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388618719] [2021-03-10 22:33:35,756 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:33:35,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:33:35,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:33:35,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:33:35,757 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) [2021-03-10 22:33:36,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:33:36,933 INFO L93 Difference]: Finished difference Result 2264 states and 7631 transitions. [2021-03-10 22:33:36,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-03-10 22:33:36,934 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 [2021-03-10 22:33:36,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:33:36,937 INFO L225 Difference]: With dead ends: 2264 [2021-03-10 22:33:36,937 INFO L226 Difference]: Without dead ends: 2254 [2021-03-10 22:33:36,937 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 798.9ms TimeCoverageRelationStatistics Valid=245, Invalid=1647, Unknown=0, NotChecked=0, Total=1892 [2021-03-10 22:33:36,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2254 states. [2021-03-10 22:33:36,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2254 to 1396. [2021-03-10 22:33:36,960 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) [2021-03-10 22:33:36,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1396 states to 1396 states and 4832 transitions. [2021-03-10 22:33:36,962 INFO L78 Accepts]: Start accepts. Automaton has 1396 states and 4832 transitions. Word has length 24 [2021-03-10 22:33:36,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:33:36,963 INFO L480 AbstractCegarLoop]: Abstraction has 1396 states and 4832 transitions. [2021-03-10 22:33:36,963 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) [2021-03-10 22:33:36,963 INFO L276 IsEmpty]: Start isEmpty. Operand 1396 states and 4832 transitions. [2021-03-10 22:33:36,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 22:33:36,965 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:33:36,965 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:33:37,167 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-03-10 22:33:37,167 INFO L428 AbstractCegarLoop]: === Iteration 96 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-03-10 22:33:37,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:33:37,167 INFO L82 PathProgramCache]: Analyzing trace with hash -448330122, now seen corresponding path program 54 times [2021-03-10 22:33:37,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:33:37,167 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087972773] [2021-03-10 22:33:37,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:33:37,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:33:37,350 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:33:37,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087972773] [2021-03-10 22:33:37,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79884373] [2021-03-10 22:33:37,351 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 [2021-03-10 22:33:37,373 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:33:37,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:33:37,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:33:37,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:33:37,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 22:33:37,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 22:33:37,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 22:33:37,597 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:33:37,597 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 [2021-03-10 22:33:37,602 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-10 22:33:37,628 INFO L628 ElimStorePlain]: treesize reduction 27, result has 50.0 percent of original size [2021-03-10 22:33:37,631 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:33:37,631 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:21 [2021-03-10 22:33:37,701 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:33:37,701 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:33:37,701 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-03-10 22:33:37,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624523524] [2021-03-10 22:33:37,701 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 22:33:37,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:33:37,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 22:33:37,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:33:37,702 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) [2021-03-10 22:33:38,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:33:38,769 INFO L93 Difference]: Finished difference Result 2206 states and 7384 transitions. [2021-03-10 22:33:38,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 22:33:38,770 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 [2021-03-10 22:33:38,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:33:38,773 INFO L225 Difference]: With dead ends: 2206 [2021-03-10 22:33:38,773 INFO L226 Difference]: Without dead ends: 2174 [2021-03-10 22:33:38,773 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 753.5ms TimeCoverageRelationStatistics Valid=167, Invalid=1165, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 22:33:38,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2174 states. [2021-03-10 22:33:38,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2174 to 1408. [2021-03-10 22:33:38,789 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) [2021-03-10 22:33:38,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1408 states to 1408 states and 4873 transitions. [2021-03-10 22:33:38,792 INFO L78 Accepts]: Start accepts. Automaton has 1408 states and 4873 transitions. Word has length 24 [2021-03-10 22:33:38,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:33:38,792 INFO L480 AbstractCegarLoop]: Abstraction has 1408 states and 4873 transitions. [2021-03-10 22:33:38,792 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) [2021-03-10 22:33:38,792 INFO L276 IsEmpty]: Start isEmpty. Operand 1408 states and 4873 transitions. [2021-03-10 22:33:38,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 22:33:38,794 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:33:38,794 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:33:38,994 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-03-10 22:33:38,994 INFO L428 AbstractCegarLoop]: === Iteration 97 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-03-10 22:33:38,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:33:38,995 INFO L82 PathProgramCache]: Analyzing trace with hash 1487913390, now seen corresponding path program 55 times [2021-03-10 22:33:38,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:33:38,995 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954532754] [2021-03-10 22:33:38,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:33:38,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:33:39,175 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:33:39,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954532754] [2021-03-10 22:33:39,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034949688] [2021-03-10 22:33:39,175 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 [2021-03-10 22:33:39,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:33:39,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:33:39,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:33:39,352 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 [2021-03-10 22:33:39,353 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:33:39,354 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:33:39,354 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:33:39,354 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-03-10 22:33:39,402 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:33:39,402 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:33:39,402 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-03-10 22:33:39,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204240470] [2021-03-10 22:33:39,403 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:33:39,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:33:39,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:33:39,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:33:39,403 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) [2021-03-10 22:33:40,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:33:40,709 INFO L93 Difference]: Finished difference Result 2197 states and 7402 transitions. [2021-03-10 22:33:40,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-03-10 22:33:40,710 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 [2021-03-10 22:33:40,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:33:40,713 INFO L225 Difference]: With dead ends: 2197 [2021-03-10 22:33:40,713 INFO L226 Difference]: Without dead ends: 2175 [2021-03-10 22:33:40,713 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 863.2ms TimeCoverageRelationStatistics Valid=235, Invalid=1487, Unknown=0, NotChecked=0, Total=1722 [2021-03-10 22:33:40,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2175 states. [2021-03-10 22:33:40,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2175 to 1410. [2021-03-10 22:33:40,730 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) [2021-03-10 22:33:40,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1410 states to 1410 states and 4885 transitions. [2021-03-10 22:33:40,732 INFO L78 Accepts]: Start accepts. Automaton has 1410 states and 4885 transitions. Word has length 24 [2021-03-10 22:33:40,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:33:40,732 INFO L480 AbstractCegarLoop]: Abstraction has 1410 states and 4885 transitions. [2021-03-10 22:33:40,732 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) [2021-03-10 22:33:40,732 INFO L276 IsEmpty]: Start isEmpty. Operand 1410 states and 4885 transitions. [2021-03-10 22:33:40,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 22:33:40,734 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:33:40,734 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:33:40,937 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:33:40,937 INFO L428 AbstractCegarLoop]: === Iteration 98 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-03-10 22:33:40,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:33:40,937 INFO L82 PathProgramCache]: Analyzing trace with hash 1311371958, now seen corresponding path program 56 times [2021-03-10 22:33:40,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:33:40,937 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109256581] [2021-03-10 22:33:40,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:33:40,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:33:41,108 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:33:41,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109256581] [2021-03-10 22:33:41,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664402069] [2021-03-10 22:33:41,109 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 [2021-03-10 22:33:41,130 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:33:41,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:33:41,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-10 22:33:41,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:33:41,268 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:33:41,269 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 [2021-03-10 22:33:41,270 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:33:41,280 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:33:41,281 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:33:41,281 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-03-10 22:33:41,372 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:33:41,372 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:33:41,372 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-03-10 22:33:41,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493824389] [2021-03-10 22:33:41,373 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:33:41,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:33:41,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:33:41,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:33:41,373 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) [2021-03-10 22:33:42,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:33:42,493 INFO L93 Difference]: Finished difference Result 2128 states and 7175 transitions. [2021-03-10 22:33:42,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-03-10 22:33:42,493 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 [2021-03-10 22:33:42,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:33:42,496 INFO L225 Difference]: With dead ends: 2128 [2021-03-10 22:33:42,496 INFO L226 Difference]: Without dead ends: 2118 [2021-03-10 22:33:42,496 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 490 ImplicationChecksByTransitivity, 837.8ms TimeCoverageRelationStatistics Valid=251, Invalid=1555, Unknown=0, NotChecked=0, Total=1806 [2021-03-10 22:33:42,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2118 states. [2021-03-10 22:33:42,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2118 to 1416. [2021-03-10 22:33:42,512 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) [2021-03-10 22:33:42,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1416 states to 1416 states and 4900 transitions. [2021-03-10 22:33:42,514 INFO L78 Accepts]: Start accepts. Automaton has 1416 states and 4900 transitions. Word has length 24 [2021-03-10 22:33:42,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:33:42,514 INFO L480 AbstractCegarLoop]: Abstraction has 1416 states and 4900 transitions. [2021-03-10 22:33:42,514 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) [2021-03-10 22:33:42,514 INFO L276 IsEmpty]: Start isEmpty. Operand 1416 states and 4900 transitions. [2021-03-10 22:33:42,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 22:33:42,516 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:33:42,516 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:33:42,717 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:33:42,717 INFO L428 AbstractCegarLoop]: === Iteration 99 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-03-10 22:33:42,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:33:42,718 INFO L82 PathProgramCache]: Analyzing trace with hash 477633518, now seen corresponding path program 57 times [2021-03-10 22:33:42,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:33:42,718 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435706603] [2021-03-10 22:33:42,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:33:42,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:33:42,895 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:33:42,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435706603] [2021-03-10 22:33:42,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215445104] [2021-03-10 22:33:42,895 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 22:33:42,917 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 22:33:42,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:33:42,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 22:33:42,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:33:43,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 22:33:43,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 22:33:43,092 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:33:43,092 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 [2021-03-10 22:33:43,093 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:33:43,111 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:33:43,135 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:33:43,135 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:188 [2021-03-10 22:33:43,352 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:33:43,352 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:33:43,352 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-03-10 22:33:43,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659606260] [2021-03-10 22:33:43,352 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:33:43,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:33:43,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:33:43,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:33:43,353 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) [2021-03-10 22:33:44,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:33:44,723 INFO L93 Difference]: Finished difference Result 2092 states and 7054 transitions. [2021-03-10 22:33:44,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-03-10 22:33:44,723 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 [2021-03-10 22:33:44,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:33:44,726 INFO L225 Difference]: With dead ends: 2092 [2021-03-10 22:33:44,726 INFO L226 Difference]: Without dead ends: 2080 [2021-03-10 22:33:44,727 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 1045.5ms TimeCoverageRelationStatistics Valid=199, Invalid=1441, Unknown=0, NotChecked=0, Total=1640 [2021-03-10 22:33:44,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2080 states. [2021-03-10 22:33:44,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2080 to 1414. [2021-03-10 22:33:44,743 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) [2021-03-10 22:33:44,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1414 states to 1414 states and 4901 transitions. [2021-03-10 22:33:44,745 INFO L78 Accepts]: Start accepts. Automaton has 1414 states and 4901 transitions. Word has length 24 [2021-03-10 22:33:44,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:33:44,746 INFO L480 AbstractCegarLoop]: Abstraction has 1414 states and 4901 transitions. [2021-03-10 22:33:44,746 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) [2021-03-10 22:33:44,746 INFO L276 IsEmpty]: Start isEmpty. Operand 1414 states and 4901 transitions. [2021-03-10 22:33:44,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 22:33:44,748 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:33:44,748 INFO L519 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] [2021-03-10 22:33:44,962 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:33:44,962 INFO L428 AbstractCegarLoop]: === Iteration 100 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-03-10 22:33:44,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:33:44,962 INFO L82 PathProgramCache]: Analyzing trace with hash -291281526, now seen corresponding path program 8 times [2021-03-10 22:33:44,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:33:44,962 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756230483] [2021-03-10 22:33:44,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:33:44,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:33:45,150 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:33:45,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756230483] [2021-03-10 22:33:45,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296346379] [2021-03-10 22:33:45,150 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 [2021-03-10 22:33:45,175 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:33:45,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:33:45,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-10 22:33:45,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:33:45,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 22:33:45,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:33:45,445 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 [2021-03-10 22:33:45,446 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:33:45,451 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:33:45,452 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:33:45,452 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-03-10 22:33:45,489 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:33:45,489 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:33:45,489 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-03-10 22:33:45,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471364174] [2021-03-10 22:33:45,489 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 22:33:45,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:33:45,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 22:33:45,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:33:45,490 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) [2021-03-10 22:33:46,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:33:46,648 INFO L93 Difference]: Finished difference Result 2163 states and 7289 transitions. [2021-03-10 22:33:46,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-03-10 22:33:46,649 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 [2021-03-10 22:33:46,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:33:46,652 INFO L225 Difference]: With dead ends: 2163 [2021-03-10 22:33:46,652 INFO L226 Difference]: Without dead ends: 2154 [2021-03-10 22:33:46,652 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 801.4ms TimeCoverageRelationStatistics Valid=206, Invalid=1434, Unknown=0, NotChecked=0, Total=1640 [2021-03-10 22:33:46,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2154 states. [2021-03-10 22:33:46,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2154 to 1414. [2021-03-10 22:33:46,667 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) [2021-03-10 22:33:46,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1414 states to 1414 states and 4901 transitions. [2021-03-10 22:33:46,670 INFO L78 Accepts]: Start accepts. Automaton has 1414 states and 4901 transitions. Word has length 24 [2021-03-10 22:33:46,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:33:46,670 INFO L480 AbstractCegarLoop]: Abstraction has 1414 states and 4901 transitions. [2021-03-10 22:33:46,670 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) [2021-03-10 22:33:46,670 INFO L276 IsEmpty]: Start isEmpty. Operand 1414 states and 4901 transitions. [2021-03-10 22:33:46,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 22:33:46,672 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:33:46,672 INFO L519 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] [2021-03-10 22:33:46,872 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:33:46,872 INFO L428 AbstractCegarLoop]: === Iteration 101 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-03-10 22:33:46,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:33:46,872 INFO L82 PathProgramCache]: Analyzing trace with hash -500818906, now seen corresponding path program 9 times [2021-03-10 22:33:46,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:33:46,872 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148362937] [2021-03-10 22:33:46,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:33:46,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:33:47,074 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:33:47,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148362937] [2021-03-10 22:33:47,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515988069] [2021-03-10 22:33:47,074 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 [2021-03-10 22:33:47,095 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:33:47,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:33:47,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:33:47,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:33:47,254 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 [2021-03-10 22:33:47,255 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:33:47,257 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:33:47,257 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:33:47,257 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-03-10 22:33:47,293 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:33:47,293 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:33:47,293 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-03-10 22:33:47,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280731745] [2021-03-10 22:33:47,293 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:33:47,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:33:47,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:33:47,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:33:47,294 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) [2021-03-10 22:33:48,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:33:48,690 INFO L93 Difference]: Finished difference Result 2207 states and 7434 transitions. [2021-03-10 22:33:48,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-03-10 22:33:48,690 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 [2021-03-10 22:33:48,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:33:48,693 INFO L225 Difference]: With dead ends: 2207 [2021-03-10 22:33:48,693 INFO L226 Difference]: Without dead ends: 2188 [2021-03-10 22:33:48,694 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 898.0ms TimeCoverageRelationStatistics Valid=241, Invalid=1565, Unknown=0, NotChecked=0, Total=1806 [2021-03-10 22:33:48,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2188 states. [2021-03-10 22:33:48,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2188 to 1423. [2021-03-10 22:33:48,709 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) [2021-03-10 22:33:48,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1423 states to 1423 states and 4934 transitions. [2021-03-10 22:33:48,712 INFO L78 Accepts]: Start accepts. Automaton has 1423 states and 4934 transitions. Word has length 24 [2021-03-10 22:33:48,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:33:48,712 INFO L480 AbstractCegarLoop]: Abstraction has 1423 states and 4934 transitions. [2021-03-10 22:33:48,712 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) [2021-03-10 22:33:48,712 INFO L276 IsEmpty]: Start isEmpty. Operand 1423 states and 4934 transitions. [2021-03-10 22:33:48,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 22:33:48,714 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:33:48,714 INFO L519 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] [2021-03-10 22:33:48,914 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:33:48,914 INFO L428 AbstractCegarLoop]: === Iteration 102 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-03-10 22:33:48,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:33:48,914 INFO L82 PathProgramCache]: Analyzing trace with hash 1227852840, now seen corresponding path program 10 times [2021-03-10 22:33:48,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:33:48,914 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564192786] [2021-03-10 22:33:48,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:33:48,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:33:49,118 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:33:49,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564192786] [2021-03-10 22:33:49,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543061192] [2021-03-10 22:33:49,118 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 [2021-03-10 22:33:49,149 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:33:49,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:33:49,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:33:49,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:33:49,305 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 [2021-03-10 22:33:49,306 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:33:49,307 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:33:49,307 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:33:49,307 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-03-10 22:33:49,338 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:33:49,338 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:33:49,338 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-03-10 22:33:49,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048420047] [2021-03-10 22:33:49,338 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:33:49,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:33:49,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:33:49,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:33:49,339 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) [2021-03-10 22:33:50,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:33:50,582 INFO L93 Difference]: Finished difference Result 2159 states and 7292 transitions. [2021-03-10 22:33:50,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-10 22:33:50,583 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 [2021-03-10 22:33:50,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:33:50,585 INFO L225 Difference]: With dead ends: 2159 [2021-03-10 22:33:50,585 INFO L226 Difference]: Without dead ends: 2140 [2021-03-10 22:33:50,586 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 852.5ms TimeCoverageRelationStatistics Valid=235, Invalid=1487, Unknown=0, NotChecked=0, Total=1722 [2021-03-10 22:33:50,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2140 states. [2021-03-10 22:33:50,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2140 to 1421. [2021-03-10 22:33:50,601 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) [2021-03-10 22:33:50,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1421 states to 1421 states and 4931 transitions. [2021-03-10 22:33:50,604 INFO L78 Accepts]: Start accepts. Automaton has 1421 states and 4931 transitions. Word has length 24 [2021-03-10 22:33:50,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:33:50,604 INFO L480 AbstractCegarLoop]: Abstraction has 1421 states and 4931 transitions. [2021-03-10 22:33:50,604 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) [2021-03-10 22:33:50,604 INFO L276 IsEmpty]: Start isEmpty. Operand 1421 states and 4931 transitions. [2021-03-10 22:33:50,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 22:33:50,605 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:33:50,605 INFO L519 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] [2021-03-10 22:33:50,806 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:33:50,806 INFO L428 AbstractCegarLoop]: === Iteration 103 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-03-10 22:33:50,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:33:50,806 INFO L82 PathProgramCache]: Analyzing trace with hash 199702980, now seen corresponding path program 11 times [2021-03-10 22:33:50,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:33:50,806 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825712435] [2021-03-10 22:33:50,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:33:50,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:33:50,993 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:33:50,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825712435] [2021-03-10 22:33:50,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012369035] [2021-03-10 22:33:50,994 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 [2021-03-10 22:33:51,017 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:33:51,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:33:51,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:33:51,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:33:51,154 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 [2021-03-10 22:33:51,156 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:33:51,158 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:33:51,159 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:33:51,160 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-03-10 22:33:51,210 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:33:51,210 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:33:51,210 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-03-10 22:33:51,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133195097] [2021-03-10 22:33:51,210 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 22:33:51,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:33:51,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 22:33:51,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:33:51,210 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) [2021-03-10 22:33:52,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:33:52,184 INFO L93 Difference]: Finished difference Result 2129 states and 7210 transitions. [2021-03-10 22:33:52,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-10 22:33:52,184 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 [2021-03-10 22:33:52,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:33:52,187 INFO L225 Difference]: With dead ends: 2129 [2021-03-10 22:33:52,187 INFO L226 Difference]: Without dead ends: 2120 [2021-03-10 22:33:52,187 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 668.2ms TimeCoverageRelationStatistics Valid=199, Invalid=1133, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 22:33:52,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2120 states. [2021-03-10 22:33:52,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2120 to 1430. [2021-03-10 22:33:52,203 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) [2021-03-10 22:33:52,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1430 states to 1430 states and 4959 transitions. [2021-03-10 22:33:52,206 INFO L78 Accepts]: Start accepts. Automaton has 1430 states and 4959 transitions. Word has length 24 [2021-03-10 22:33:52,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:33:52,206 INFO L480 AbstractCegarLoop]: Abstraction has 1430 states and 4959 transitions. [2021-03-10 22:33:52,206 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) [2021-03-10 22:33:52,206 INFO L276 IsEmpty]: Start isEmpty. Operand 1430 states and 4959 transitions. [2021-03-10 22:33:52,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 22:33:52,208 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:33:52,208 INFO L519 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] [2021-03-10 22:33:52,423 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2021-03-10 22:33:52,423 INFO L428 AbstractCegarLoop]: === Iteration 104 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-03-10 22:33:52,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:33:52,423 INFO L82 PathProgramCache]: Analyzing trace with hash 523289158, now seen corresponding path program 12 times [2021-03-10 22:33:52,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:33:52,423 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886351667] [2021-03-10 22:33:52,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:33:52,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:33:52,586 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:33:52,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886351667] [2021-03-10 22:33:52,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456963919] [2021-03-10 22:33:52,586 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 [2021-03-10 22:33:52,607 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:33:52,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:33:52,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 22:33:52,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:33:52,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 22:33:52,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 22:33:52,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 22:33:52,793 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:33:52,793 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 [2021-03-10 22:33:52,795 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:33:52,810 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:33:52,819 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:33:52,819 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:88 [2021-03-10 22:33:52,954 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:33:52,955 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:33:52,955 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-03-10 22:33:52,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112505171] [2021-03-10 22:33:52,955 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 22:33:52,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:33:52,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 22:33:52,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:33:52,955 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) [2021-03-10 22:33:54,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:33:54,150 INFO L93 Difference]: Finished difference Result 2106 states and 7121 transitions. [2021-03-10 22:33:54,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-03-10 22:33:54,151 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 [2021-03-10 22:33:54,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:33:54,155 INFO L225 Difference]: With dead ends: 2106 [2021-03-10 22:33:54,155 INFO L226 Difference]: Without dead ends: 2097 [2021-03-10 22:33:54,156 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 968.0ms TimeCoverageRelationStatistics Valid=284, Invalid=1522, Unknown=0, NotChecked=0, Total=1806 [2021-03-10 22:33:54,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2097 states. [2021-03-10 22:33:54,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2097 to 1444. [2021-03-10 22:33:54,171 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) [2021-03-10 22:33:54,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1444 states to 1444 states and 5006 transitions. [2021-03-10 22:33:54,174 INFO L78 Accepts]: Start accepts. Automaton has 1444 states and 5006 transitions. Word has length 24 [2021-03-10 22:33:54,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:33:54,174 INFO L480 AbstractCegarLoop]: Abstraction has 1444 states and 5006 transitions. [2021-03-10 22:33:54,174 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) [2021-03-10 22:33:54,174 INFO L276 IsEmpty]: Start isEmpty. Operand 1444 states and 5006 transitions. [2021-03-10 22:33:54,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 22:33:54,176 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:33:54,176 INFO L519 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] [2021-03-10 22:33:54,376 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2021-03-10 22:33:54,376 INFO L428 AbstractCegarLoop]: === Iteration 105 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-03-10 22:33:54,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:33:54,376 INFO L82 PathProgramCache]: Analyzing trace with hash -2085934016, now seen corresponding path program 13 times [2021-03-10 22:33:54,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:33:54,376 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400358366] [2021-03-10 22:33:54,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:33:54,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:33:54,550 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:33:54,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400358366] [2021-03-10 22:33:54,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386271348] [2021-03-10 22:33:54,550 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 [2021-03-10 22:33:54,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:33:54,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:33:54,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:33:54,704 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 [2021-03-10 22:33:54,705 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:33:54,708 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:33:54,708 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:33:54,708 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-03-10 22:33:54,755 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:33:54,756 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:33:54,756 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-03-10 22:33:54,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384097582] [2021-03-10 22:33:54,756 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 22:33:54,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:33:54,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 22:33:54,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:33:54,756 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) [2021-03-10 22:33:55,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:33:55,640 INFO L93 Difference]: Finished difference Result 2058 states and 6984 transitions. [2021-03-10 22:33:55,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 22:33:55,641 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 [2021-03-10 22:33:55,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:33:55,643 INFO L225 Difference]: With dead ends: 2058 [2021-03-10 22:33:55,643 INFO L226 Difference]: Without dead ends: 2047 [2021-03-10 22:33:55,644 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 608.1ms TimeCoverageRelationStatistics Valid=149, Invalid=907, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 22:33:55,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2047 states. [2021-03-10 22:33:55,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2047 to 1436. [2021-03-10 22:33:55,658 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) [2021-03-10 22:33:55,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1436 states to 1436 states and 4982 transitions. [2021-03-10 22:33:55,661 INFO L78 Accepts]: Start accepts. Automaton has 1436 states and 4982 transitions. Word has length 24 [2021-03-10 22:33:55,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:33:55,661 INFO L480 AbstractCegarLoop]: Abstraction has 1436 states and 4982 transitions. [2021-03-10 22:33:55,661 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) [2021-03-10 22:33:55,661 INFO L276 IsEmpty]: Start isEmpty. Operand 1436 states and 4982 transitions. [2021-03-10 22:33:55,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 22:33:55,663 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:33:55,663 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:33:55,863 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,94 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:33:55,863 INFO L428 AbstractCegarLoop]: === Iteration 106 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-03-10 22:33:55,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:33:55,863 INFO L82 PathProgramCache]: Analyzing trace with hash 721304348, now seen corresponding path program 58 times [2021-03-10 22:33:55,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:33:55,864 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114349933] [2021-03-10 22:33:55,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:33:55,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:33:56,056 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:33:56,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114349933] [2021-03-10 22:33:56,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059220159] [2021-03-10 22:33:56,056 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 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 [2021-03-10 22:33:56,077 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:33:56,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:33:56,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:33:56,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:33:56,247 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 [2021-03-10 22:33:56,248 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:33:56,250 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:33:56,250 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:33:56,250 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-03-10 22:33:56,284 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:33:56,284 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:33:56,284 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-03-10 22:33:56,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043567589] [2021-03-10 22:33:56,284 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:33:56,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:33:56,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:33:56,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:33:56,285 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) [2021-03-10 22:33:58,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:33:58,377 INFO L93 Difference]: Finished difference Result 2323 states and 7747 transitions. [2021-03-10 22:33:58,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-03-10 22:33:58,378 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 [2021-03-10 22:33:58,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:33:58,381 INFO L225 Difference]: With dead ends: 2323 [2021-03-10 22:33:58,381 INFO L226 Difference]: Without dead ends: 2281 [2021-03-10 22:33:58,381 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 806 ImplicationChecksByTransitivity, 1622.9ms TimeCoverageRelationStatistics Valid=405, Invalid=2675, Unknown=0, NotChecked=0, Total=3080 [2021-03-10 22:33:58,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2281 states. [2021-03-10 22:33:58,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2281 to 1453. [2021-03-10 22:33:58,397 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) [2021-03-10 22:33:58,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1453 states to 1453 states and 5031 transitions. [2021-03-10 22:33:58,399 INFO L78 Accepts]: Start accepts. Automaton has 1453 states and 5031 transitions. Word has length 24 [2021-03-10 22:33:58,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:33:58,399 INFO L480 AbstractCegarLoop]: Abstraction has 1453 states and 5031 transitions. [2021-03-10 22:33:58,399 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) [2021-03-10 22:33:58,400 INFO L276 IsEmpty]: Start isEmpty. Operand 1453 states and 5031 transitions. [2021-03-10 22:33:58,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 22:33:58,401 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:33:58,401 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:33:58,605 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:33:58,605 INFO L428 AbstractCegarLoop]: === Iteration 107 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-03-10 22:33:58,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:33:58,605 INFO L82 PathProgramCache]: Analyzing trace with hash 1985601830, now seen corresponding path program 59 times [2021-03-10 22:33:58,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:33:58,605 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195198824] [2021-03-10 22:33:58,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:33:58,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:33:58,808 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:33:58,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195198824] [2021-03-10 22:33:58,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226698283] [2021-03-10 22:33:58,808 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) [2021-03-10 22:33:58,832 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:33:58,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:33:58,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:33:58,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:33:59,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 22:33:59,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 22:33:59,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:33:59,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:33:59,121 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 [2021-03-10 22:33:59,122 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:33:59,127 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:33:59,128 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:33:59,128 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:5 [2021-03-10 22:33:59,169 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:33:59,169 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:33:59,169 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-03-10 22:33:59,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438700167] [2021-03-10 22:33:59,169 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 22:33:59,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:33:59,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 22:33:59,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=492, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:33:59,170 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) [2021-03-10 22:34:01,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:34:01,350 INFO L93 Difference]: Finished difference Result 2240 states and 7477 transitions. [2021-03-10 22:34:01,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-03-10 22:34:01,350 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 [2021-03-10 22:34:01,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:34:01,353 INFO L225 Difference]: With dead ends: 2240 [2021-03-10 22:34:01,353 INFO L226 Difference]: Without dead ends: 2186 [2021-03-10 22:34:01,354 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 737 ImplicationChecksByTransitivity, 1726.4ms TimeCoverageRelationStatistics Valid=374, Invalid=2932, Unknown=0, NotChecked=0, Total=3306 [2021-03-10 22:34:01,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2186 states. [2021-03-10 22:34:01,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2186 to 1458. [2021-03-10 22:34:01,369 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) [2021-03-10 22:34:01,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1458 states to 1458 states and 5049 transitions. [2021-03-10 22:34:01,371 INFO L78 Accepts]: Start accepts. Automaton has 1458 states and 5049 transitions. Word has length 24 [2021-03-10 22:34:01,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:34:01,371 INFO L480 AbstractCegarLoop]: Abstraction has 1458 states and 5049 transitions. [2021-03-10 22:34:01,371 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) [2021-03-10 22:34:01,371 INFO L276 IsEmpty]: Start isEmpty. Operand 1458 states and 5049 transitions. [2021-03-10 22:34:01,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 22:34:01,373 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:34:01,373 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:34:01,573 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:34:01,573 INFO L428 AbstractCegarLoop]: === Iteration 108 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-03-10 22:34:01,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:34:01,574 INFO L82 PathProgramCache]: Analyzing trace with hash 1809060398, now seen corresponding path program 60 times [2021-03-10 22:34:01,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:34:01,574 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885691055] [2021-03-10 22:34:01,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:34:01,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:34:01,754 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:34:01,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885691055] [2021-03-10 22:34:01,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131038524] [2021-03-10 22:34:01,754 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 [2021-03-10 22:34:01,775 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 22:34:01,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:34:01,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-10 22:34:01,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:34:01,927 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:34:01,927 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 [2021-03-10 22:34:01,929 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:34:01,940 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:34:01,941 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:34:01,941 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-03-10 22:34:02,041 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:34:02,041 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:34:02,041 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-03-10 22:34:02,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138744697] [2021-03-10 22:34:02,041 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:34:02,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:34:02,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:34:02,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:34:02,042 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) [2021-03-10 22:34:03,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:34:03,875 INFO L93 Difference]: Finished difference Result 2181 states and 7340 transitions. [2021-03-10 22:34:03,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-03-10 22:34:03,876 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 [2021-03-10 22:34:03,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:34:03,879 INFO L225 Difference]: With dead ends: 2181 [2021-03-10 22:34:03,879 INFO L226 Difference]: Without dead ends: 2141 [2021-03-10 22:34:03,879 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 813 ImplicationChecksByTransitivity, 1401.7ms TimeCoverageRelationStatistics Valid=395, Invalid=2467, Unknown=0, NotChecked=0, Total=2862 [2021-03-10 22:34:03,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2141 states. [2021-03-10 22:34:03,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2141 to 1469. [2021-03-10 22:34:03,894 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) [2021-03-10 22:34:03,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1469 states to 1469 states and 5083 transitions. [2021-03-10 22:34:03,896 INFO L78 Accepts]: Start accepts. Automaton has 1469 states and 5083 transitions. Word has length 24 [2021-03-10 22:34:03,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:34:03,896 INFO L480 AbstractCegarLoop]: Abstraction has 1469 states and 5083 transitions. [2021-03-10 22:34:03,897 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) [2021-03-10 22:34:03,897 INFO L276 IsEmpty]: Start isEmpty. Operand 1469 states and 5083 transitions. [2021-03-10 22:34:03,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 22:34:03,898 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:34:03,898 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:34:04,098 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable187 [2021-03-10 22:34:04,099 INFO L428 AbstractCegarLoop]: === Iteration 109 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-03-10 22:34:04,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:34:04,099 INFO L82 PathProgramCache]: Analyzing trace with hash 975321958, now seen corresponding path program 61 times [2021-03-10 22:34:04,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:34:04,099 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124969051] [2021-03-10 22:34:04,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:34:04,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:34:04,292 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:34:04,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124969051] [2021-03-10 22:34:04,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923242093] [2021-03-10 22:34:04,292 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 [2021-03-10 22:34:04,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:34:04,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:34:04,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:34:04,445 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 [2021-03-10 22:34:04,446 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:34:04,449 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:34:04,450 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:34:04,450 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-03-10 22:34:04,505 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:34:04,505 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:34:04,505 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-03-10 22:34:04,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638687526] [2021-03-10 22:34:04,506 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 22:34:04,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:34:04,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 22:34:04,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:34:04,506 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) [2021-03-10 22:34:05,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:34:05,740 INFO L93 Difference]: Finished difference Result 2093 states and 7080 transitions. [2021-03-10 22:34:05,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-03-10 22:34:05,740 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 [2021-03-10 22:34:05,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:34:05,743 INFO L225 Difference]: With dead ends: 2093 [2021-03-10 22:34:05,743 INFO L226 Difference]: Without dead ends: 2067 [2021-03-10 22:34:05,743 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 932.0ms TimeCoverageRelationStatistics Valid=238, Invalid=1402, Unknown=0, NotChecked=0, Total=1640 [2021-03-10 22:34:05,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2067 states. [2021-03-10 22:34:05,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2067 to 1471. [2021-03-10 22:34:05,757 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) [2021-03-10 22:34:05,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1471 states to 1471 states and 5087 transitions. [2021-03-10 22:34:05,759 INFO L78 Accepts]: Start accepts. Automaton has 1471 states and 5087 transitions. Word has length 24 [2021-03-10 22:34:05,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:34:05,760 INFO L480 AbstractCegarLoop]: Abstraction has 1471 states and 5087 transitions. [2021-03-10 22:34:05,760 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) [2021-03-10 22:34:05,760 INFO L276 IsEmpty]: Start isEmpty. Operand 1471 states and 5087 transitions. [2021-03-10 22:34:05,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 22:34:05,761 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:34:05,761 INFO L519 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] [2021-03-10 22:34:05,962 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2021-03-10 22:34:05,962 INFO L428 AbstractCegarLoop]: === Iteration 110 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-03-10 22:34:05,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:34:05,962 INFO L82 PathProgramCache]: Analyzing trace with hash -846298030, now seen corresponding path program 14 times [2021-03-10 22:34:05,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:34:05,962 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526423843] [2021-03-10 22:34:05,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:34:05,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:34:06,177 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:34:06,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526423843] [2021-03-10 22:34:06,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880056360] [2021-03-10 22:34:06,178 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 [2021-03-10 22:34:06,198 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:34:06,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:34:06,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-10 22:34:06,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:34:06,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 22:34:06,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:34:06,446 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 [2021-03-10 22:34:06,447 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:34:06,452 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:34:06,453 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:34:06,453 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-03-10 22:34:06,493 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:34:06,493 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:34:06,494 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-03-10 22:34:06,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340487961] [2021-03-10 22:34:06,494 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 22:34:06,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:34:06,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 22:34:06,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:34:06,494 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) [2021-03-10 22:34:08,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:34:08,318 INFO L93 Difference]: Finished difference Result 2308 states and 7673 transitions. [2021-03-10 22:34:08,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-03-10 22:34:08,318 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 [2021-03-10 22:34:08,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:34:08,322 INFO L225 Difference]: With dead ends: 2308 [2021-03-10 22:34:08,322 INFO L226 Difference]: Without dead ends: 2258 [2021-03-10 22:34:08,322 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 762 ImplicationChecksByTransitivity, 1477.8ms TimeCoverageRelationStatistics Valid=381, Invalid=2589, Unknown=0, NotChecked=0, Total=2970 [2021-03-10 22:34:08,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2258 states. [2021-03-10 22:34:08,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2258 to 1475. [2021-03-10 22:34:08,338 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) [2021-03-10 22:34:08,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1475 states to 1475 states and 5102 transitions. [2021-03-10 22:34:08,341 INFO L78 Accepts]: Start accepts. Automaton has 1475 states and 5102 transitions. Word has length 24 [2021-03-10 22:34:08,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:34:08,341 INFO L480 AbstractCegarLoop]: Abstraction has 1475 states and 5102 transitions. [2021-03-10 22:34:08,341 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) [2021-03-10 22:34:08,341 INFO L276 IsEmpty]: Start isEmpty. Operand 1475 states and 5102 transitions. [2021-03-10 22:34:08,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 22:34:08,343 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:34:08,343 INFO L519 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] [2021-03-10 22:34:08,543 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:34:08,543 INFO L428 AbstractCegarLoop]: === Iteration 111 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-03-10 22:34:08,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:34:08,543 INFO L82 PathProgramCache]: Analyzing trace with hash 882373716, now seen corresponding path program 15 times [2021-03-10 22:34:08,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:34:08,543 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591601401] [2021-03-10 22:34:08,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:34:08,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:34:08,767 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:34:08,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591601401] [2021-03-10 22:34:08,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204885985] [2021-03-10 22:34:08,767 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 [2021-03-10 22:34:08,788 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 22:34:08,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:34:08,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-10 22:34:08,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:34:08,996 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:34:08,996 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 [2021-03-10 22:34:08,997 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:34:09,008 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:34:09,008 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:34:09,008 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:25 [2021-03-10 22:34:09,079 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:34:09,079 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:34:09,079 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 24 [2021-03-10 22:34:09,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068387663] [2021-03-10 22:34:09,079 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 22:34:09,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:34:09,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 22:34:09,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:34:09,080 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) [2021-03-10 22:34:09,397 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 57 [2021-03-10 22:34:10,995 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 53 [2021-03-10 22:34:11,833 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 51 [2021-03-10 22:34:12,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:34:12,053 INFO L93 Difference]: Finished difference Result 2288 states and 7644 transitions. [2021-03-10 22:34:12,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-03-10 22:34:12,054 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 [2021-03-10 22:34:12,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:34:12,054 INFO L225 Difference]: With dead ends: 2288 [2021-03-10 22:34:12,054 INFO L226 Difference]: Without dead ends: 0 [2021-03-10 22:34:12,054 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1183 ImplicationChecksByTransitivity, 2532.0ms TimeCoverageRelationStatistics Valid=572, Invalid=3588, Unknown=0, NotChecked=0, Total=4160 [2021-03-10 22:34:12,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-03-10 22:34:12,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-03-10 22:34:12,055 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) [2021-03-10 22:34:12,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-03-10 22:34:12,055 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 24 [2021-03-10 22:34:12,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:34:12,055 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-03-10 22:34:12,055 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) [2021-03-10 22:34:12,055 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-03-10 22:34:12,055 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-03-10 22:34:12,255 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable191 [2021-03-10 22:34:12,258 INFO L202 PluginConnector]: Adding new model parallel-sum-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.03 10:34:12 BasicIcfg [2021-03-10 22:34:12,258 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-10 22:34:12,259 INFO L168 Benchmark]: Toolchain (without parser) took 120166.03 ms. Allocated memory was 339.7 MB in the beginning and 419.4 MB in the end (delta: 79.7 MB). Free memory was 320.0 MB in the beginning and 344.3 MB in the end (delta: -24.3 MB). Peak memory consumption was 57.9 MB. Max. memory is 16.0 GB. [2021-03-10 22:34:12,259 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 339.7 MB. Free memory was 321.2 MB in the beginning and 321.1 MB in the end (delta: 75.1 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-10 22:34:12,259 INFO L168 Benchmark]: Boogie Procedure Inliner took 18.10 ms. Allocated memory is still 339.7 MB. Free memory was 319.5 MB in the beginning and 318.0 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-10 22:34:12,259 INFO L168 Benchmark]: Boogie Preprocessor took 12.96 ms. Allocated memory is still 339.7 MB. Free memory was 318.0 MB in the beginning and 317.0 MB in the end (delta: 1.0 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.0 GB. [2021-03-10 22:34:12,259 INFO L168 Benchmark]: RCFGBuilder took 186.41 ms. Allocated memory is still 339.7 MB. Free memory was 317.0 MB in the beginning and 301.4 MB in the end (delta: 15.6 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.0 GB. [2021-03-10 22:34:12,259 INFO L168 Benchmark]: TraceAbstraction took 119941.76 ms. Allocated memory was 339.7 MB in the beginning and 419.4 MB in the end (delta: 79.7 MB). Free memory was 301.0 MB in the beginning and 344.3 MB in the end (delta: -43.3 MB). Peak memory consumption was 39.1 MB. Max. memory is 16.0 GB. [2021-03-10 22:34:12,259 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 0.10 ms. Allocated memory is still 339.7 MB. Free memory was 321.2 MB in the beginning and 321.1 MB in the end (delta: 75.1 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 18.10 ms. Allocated memory is still 339.7 MB. Free memory was 319.5 MB in the beginning and 318.0 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 12.96 ms. Allocated memory is still 339.7 MB. Free memory was 318.0 MB in the beginning and 317.0 MB in the end (delta: 1.0 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.0 GB. * RCFGBuilder took 186.41 ms. Allocated memory is still 339.7 MB. Free memory was 317.0 MB in the beginning and 301.4 MB in the end (delta: 15.6 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.0 GB. * TraceAbstraction took 119941.76 ms. Allocated memory was 339.7 MB in the beginning and 419.4 MB in the end (delta: 79.7 MB). Free memory was 301.0 MB in the beginning and 344.3 MB in the end (delta: -43.3 MB). Peak memory consumption was 39.1 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: 119864.6ms, OverallIterations: 111, TraceHistogramMax: 2, EmptinessCheckTime: 122.0ms, AutomataDifference: 70777.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 18.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 7171 SDtfs, 16481 SDslu, 49201 SDs, 0 SdLazy, 59223 SolverSat, 5561 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 22492.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4444 GetRequests, 1614 SyntacticMatches, 108 SemanticMatches, 2722 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24067 ImplicationChecksByTransitivity, 54039.3ms 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: 1216.2ms AutomataMinimizationTime, 111 MinimizatonAttempts, 46056 StatesRemovedByMinimization, 109 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 394.3ms SsaConstructionTime, 967.5ms SatisfiabilityAnalysisTime, 24095.8ms 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...