/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/simple-queue.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-7cd14b8b9f04096d8ddfd3d9cd8a4ac590fe5404-7cd14b8 [2021-03-10 23:13:19,281 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-10 23:13:19,283 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-10 23:13:19,317 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-03-10 23:13:19,376 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 23:13:19,410 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-10 23:13:19,410 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-10 23:13:19,411 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-03-10 23:13:19,411 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-03-10 23:13:19,414 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-10 23:13:19,414 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-10 23:13:19,414 INFO L138 SettingsManager]: * Use SBE=true [2021-03-10 23:13:19,414 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-10 23:13:19,414 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-10 23:13:19,415 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-10 23:13:19,415 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-10 23:13:19,415 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-10 23:13:19,415 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-10 23:13:19,416 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-10 23:13:19,416 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-10 23:13:19,416 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-10 23:13:19,416 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-10 23:13:19,416 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-10 23:13:19,416 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-10 23:13:19,416 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-10 23:13:19,417 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-10 23:13:19,417 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-10 23:13:19,417 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-10 23:13:19,417 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-10 23:13:19,417 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-10 23:13:19,417 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-10 23:13:19,417 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-10 23:13:19,418 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-10 23:13:19,418 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-10 23:13:19,418 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-03-10 23:13:19,418 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-03-10 23:13:19,418 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-10 23:13:19,712 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-10 23:13:19,727 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-10 23:13:19,729 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-10 23:13:19,730 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-03-10 23:13:19,731 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-03-10 23:13:19,732 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/simple-queue.wvr.bpl [2021-03-10 23:13:19,733 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/simple-queue.wvr.bpl' [2021-03-10 23:13:19,913 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-10 23:13:19,917 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-03-10 23:13:19,919 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-10 23:13:19,919 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-10 23:13:19,919 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-10 23:13:19,928 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 11:13:19" (1/1) ... [2021-03-10 23:13:19,933 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 11:13:19" (1/1) ... [2021-03-10 23:13:19,939 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-10 23:13:19,940 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-10 23:13:19,940 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-10 23:13:19,940 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-10 23:13:19,945 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 11:13:19" (1/1) ... [2021-03-10 23:13:19,945 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 11:13:19" (1/1) ... [2021-03-10 23:13:19,946 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 11:13:19" (1/1) ... [2021-03-10 23:13:19,946 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 11:13:19" (1/1) ... [2021-03-10 23:13:19,947 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 11:13:19" (1/1) ... [2021-03-10 23:13:19,949 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 11:13:19" (1/1) ... [2021-03-10 23:13:19,950 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 11:13:19" (1/1) ... [2021-03-10 23:13:19,951 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-10 23:13:19,951 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-10 23:13:19,951 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-10 23:13:19,951 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-10 23:13:19,954 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 11:13:19" (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 23:13:20,021 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-03-10 23:13:20,021 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-03-10 23:13:20,022 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-03-10 23:13:20,022 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-03-10 23:13:20,022 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-03-10 23:13:20,022 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-03-10 23:13:20,022 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-03-10 23:13:20,023 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-10 23:13:20,023 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-10 23:13:20,023 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 23:13:20,201 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-10 23:13:20,201 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-03-10 23:13:20,202 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread1EXIT is neither atomic block end nor error location. [2021-03-10 23:13:20,202 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread2EXIT is neither atomic block end nor error location. [2021-03-10 23:13:20,203 INFO L202 PluginConnector]: Adding new model simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.03 11:13:20 BoogieIcfgContainer [2021-03-10 23:13:20,203 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-10 23:13:20,205 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-10 23:13:20,205 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-10 23:13:20,211 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-10 23:13:20,211 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 11:13:19" (1/2) ... [2021-03-10 23:13:20,211 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@dcfc578 and model type simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.03 11:13:20, skipping insertion in model container [2021-03-10 23:13:20,212 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.03 11:13:20" (2/2) ... [2021-03-10 23:13:20,213 INFO L111 eAbstractionObserver]: Analyzing ICFG simple-queue.wvr.bpl [2021-03-10 23:13:20,217 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-03-10 23:13:20,217 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-10 23:13:20,220 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-10 23:13:20,220 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-10 23:13:20,274 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-03-10 23:13:20,302 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-03-10 23:13:20,334 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-10 23:13:20,334 INFO L377 AbstractCegarLoop]: Hoare is true [2021-03-10 23:13:20,334 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-10 23:13:20,335 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-10 23:13:20,335 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-10 23:13:20,335 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-10 23:13:20,335 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-10 23:13:20,335 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-10 23:13:20,341 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 46 flow [2021-03-10 23:13:20,363 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 15 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:13:20,365 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:13:20,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-03-10 23:13:20,369 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:13:20,370 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:13:20,370 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:13:20,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:13:20,374 INFO L82 PathProgramCache]: Analyzing trace with hash -262068682, now seen corresponding path program 1 times [2021-03-10 23:13:20,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:13:20,381 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299820246] [2021-03-10 23:13:20,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:13:20,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:13:20,487 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 23:13:20,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299820246] [2021-03-10 23:13:20,489 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 23:13:20,489 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-03-10 23:13:20,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071297826] [2021-03-10 23:13:20,493 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-10 23:13:20,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:13:20,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-10 23:13:20,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-10 23:13:20,510 INFO L87 Difference]: Start difference. First operand has 15 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:13:20,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:13:20,529 INFO L93 Difference]: Finished difference Result 20 states and 34 transitions. [2021-03-10 23:13:20,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-10 23:13:20,531 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-03-10 23:13:20,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:13:20,542 INFO L225 Difference]: With dead ends: 20 [2021-03-10 23:13:20,542 INFO L226 Difference]: Without dead ends: 16 [2021-03-10 23:13:20,543 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-10 23:13:20,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-03-10 23:13:20,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-03-10 23:13:20,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.8) internal successors, (27), 15 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 23:13:20,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 27 transitions. [2021-03-10 23:13:20,568 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 27 transitions. Word has length 9 [2021-03-10 23:13:20,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:13:20,568 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 27 transitions. [2021-03-10 23:13:20,568 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:13:20,569 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 27 transitions. [2021-03-10 23:13:20,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-03-10 23:13:20,569 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:13:20,569 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:13:20,570 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-10 23:13:20,570 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:13:20,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:13:20,575 INFO L82 PathProgramCache]: Analyzing trace with hash 488876151, now seen corresponding path program 1 times [2021-03-10 23:13:20,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:13:20,575 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701325691] [2021-03-10 23:13:20,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:13:20,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:13:20,629 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 23:13:20,629 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701325691] [2021-03-10 23:13:20,629 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 23:13:20,629 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-03-10 23:13:20,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562818209] [2021-03-10 23:13:20,630 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-10 23:13:20,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:13:20,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-10 23:13:20,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-10 23:13:20,633 INFO L87 Difference]: Start difference. First operand 16 states and 27 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:13:20,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:13:20,642 INFO L93 Difference]: Finished difference Result 21 states and 34 transitions. [2021-03-10 23:13:20,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-10 23:13:20,643 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-03-10 23:13:20,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:13:20,644 INFO L225 Difference]: With dead ends: 21 [2021-03-10 23:13:20,644 INFO L226 Difference]: Without dead ends: 18 [2021-03-10 23:13:20,645 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-10 23:13:20,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-03-10 23:13:20,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-03-10 23:13:20,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 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 23:13:20,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 30 transitions. [2021-03-10 23:13:20,651 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 30 transitions. Word has length 10 [2021-03-10 23:13:20,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:13:20,651 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 30 transitions. [2021-03-10 23:13:20,651 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:13:20,651 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 30 transitions. [2021-03-10 23:13:20,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-03-10 23:13:20,652 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:13:20,652 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:13:20,652 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-03-10 23:13:20,652 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:13:20,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:13:20,653 INFO L82 PathProgramCache]: Analyzing trace with hash 426152002, now seen corresponding path program 1 times [2021-03-10 23:13:20,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:13:20,653 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586149143] [2021-03-10 23:13:20,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:13:20,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:13:20,715 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 23:13:20,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586149143] [2021-03-10 23:13:20,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098550928] [2021-03-10 23:13:20,715 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 23:13:20,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:13:20,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 23:13:20,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:13:20,829 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 11 treesize of output 7 [2021-03-10 23:13:20,831 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:13:20,837 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:13:20,838 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 23:13:20,838 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-03-10 23:13:20,873 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 23:13:20,873 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:13:20,873 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-03-10 23:13:20,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412082895] [2021-03-10 23:13:20,892 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-10 23:13:20,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:13:20,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-10 23:13:20,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-10 23:13:20,897 INFO L87 Difference]: Start difference. First operand 18 states and 30 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:13:20,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:13:20,935 INFO L93 Difference]: Finished difference Result 25 states and 43 transitions. [2021-03-10 23:13:20,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-10 23:13:20,937 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-03-10 23:13:20,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:13:20,938 INFO L225 Difference]: With dead ends: 25 [2021-03-10 23:13:20,938 INFO L226 Difference]: Without dead ends: 21 [2021-03-10 23:13:20,938 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 27.9ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-03-10 23:13:20,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-03-10 23:13:20,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-03-10 23:13:20,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.8) internal successors, (36), 20 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 23:13:20,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 36 transitions. [2021-03-10 23:13:20,941 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 36 transitions. Word has length 11 [2021-03-10 23:13:20,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:13:20,941 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 36 transitions. [2021-03-10 23:13:20,941 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:13:20,941 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 36 transitions. [2021-03-10 23:13:20,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-03-10 23:13:20,942 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:13:20,942 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:13:21,142 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-03-10 23:13:21,143 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:13:21,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:13:21,144 INFO L82 PathProgramCache]: Analyzing trace with hash 348880875, now seen corresponding path program 2 times [2021-03-10 23:13:21,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:13:21,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516847571] [2021-03-10 23:13:21,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:13:21,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:13:21,191 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:13:21,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516847571] [2021-03-10 23:13:21,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077165763] [2021-03-10 23:13:21,192 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 23:13:21,212 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:13:21,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:13:21,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2021-03-10 23:13:21,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:13:21,277 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:13:21,278 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:13:21,278 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 4 [2021-03-10 23:13:21,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842965985] [2021-03-10 23:13:21,278 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-10 23:13:21,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:13:21,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-10 23:13:21,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-03-10 23:13:21,279 INFO L87 Difference]: Start difference. First operand 21 states and 36 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:13:21,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:13:21,290 INFO L93 Difference]: Finished difference Result 50 states and 82 transitions. [2021-03-10 23:13:21,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-10 23:13:21,291 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-03-10 23:13:21,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:13:21,292 INFO L225 Difference]: With dead ends: 50 [2021-03-10 23:13:21,292 INFO L226 Difference]: Without dead ends: 45 [2021-03-10 23:13:21,293 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.7ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-03-10 23:13:21,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-03-10 23:13:21,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 33. [2021-03-10 23:13:21,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.9375) internal successors, (62), 32 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:13:21,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 62 transitions. [2021-03-10 23:13:21,298 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 62 transitions. Word has length 12 [2021-03-10 23:13:21,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:13:21,298 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 62 transitions. [2021-03-10 23:13:21,299 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:13:21,299 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 62 transitions. [2021-03-10 23:13:21,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-03-10 23:13:21,299 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:13:21,299 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:13:21,523 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:13:21,523 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:13:21,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:13:21,523 INFO L82 PathProgramCache]: Analyzing trace with hash 200515830, now seen corresponding path program 3 times [2021-03-10 23:13:21,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:13:21,524 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490578324] [2021-03-10 23:13:21,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:13:21,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:13:21,598 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 23:13:21,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490578324] [2021-03-10 23:13:21,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379882302] [2021-03-10 23:13:21,599 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 23:13:21,628 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 23:13:21,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:13:21,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 23:13:21,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:13:21,695 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 11 treesize of output 7 [2021-03-10 23:13:21,700 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:13:21,702 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:13:21,702 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 23:13:21,702 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-03-10 23:13:21,716 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 23:13:21,717 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:13:21,717 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-03-10 23:13:21,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957570132] [2021-03-10 23:13:21,718 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 23:13:21,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:13:21,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 23:13:21,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-03-10 23:13:21,719 INFO L87 Difference]: Start difference. First operand 33 states and 62 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:13:21,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:13:21,794 INFO L93 Difference]: Finished difference Result 65 states and 115 transitions. [2021-03-10 23:13:21,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 23:13:21,795 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-03-10 23:13:21,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:13:21,797 INFO L225 Difference]: With dead ends: 65 [2021-03-10 23:13:21,797 INFO L226 Difference]: Without dead ends: 39 [2021-03-10 23:13:21,797 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 75.1ms TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-03-10 23:13:21,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-03-10 23:13:21,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 26. [2021-03-10 23:13:21,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.84) internal successors, (46), 25 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:13:21,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 46 transitions. [2021-03-10 23:13:21,801 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 46 transitions. Word has length 13 [2021-03-10 23:13:21,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:13:21,802 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 46 transitions. [2021-03-10 23:13:21,802 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:13:21,802 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 46 transitions. [2021-03-10 23:13:21,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-03-10 23:13:21,803 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:13:21,803 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:13:22,011 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:13:22,011 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:13:22,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:13:22,012 INFO L82 PathProgramCache]: Analyzing trace with hash 1944094135, now seen corresponding path program 4 times [2021-03-10 23:13:22,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:13:22,012 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020480179] [2021-03-10 23:13:22,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:13:22,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:13:22,064 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:13:22,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020480179] [2021-03-10 23:13:22,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989647727] [2021-03-10 23:13:22,065 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:13:22,091 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:13:22,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:13:22,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 23:13:22,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:13:22,137 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:13:22,137 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:13:22,137 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-03-10 23:13:22,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374082926] [2021-03-10 23:13:22,138 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-10 23:13:22,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:13:22,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-10 23:13:22,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-03-10 23:13:22,139 INFO L87 Difference]: Start difference. First operand 26 states and 46 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:13:22,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:13:22,151 INFO L93 Difference]: Finished difference Result 73 states and 125 transitions. [2021-03-10 23:13:22,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-10 23:13:22,151 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-03-10 23:13:22,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:13:22,152 INFO L225 Difference]: With dead ends: 73 [2021-03-10 23:13:22,152 INFO L226 Difference]: Without dead ends: 66 [2021-03-10 23:13:22,152 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 12.0ms TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-03-10 23:13:22,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-03-10 23:13:22,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 48. [2021-03-10 23:13:22,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 2.021276595744681) internal successors, (95), 47 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:13:22,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 95 transitions. [2021-03-10 23:13:22,158 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 95 transitions. Word has length 14 [2021-03-10 23:13:22,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:13:22,158 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 95 transitions. [2021-03-10 23:13:22,158 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:13:22,158 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 95 transitions. [2021-03-10 23:13:22,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 23:13:22,159 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:13:22,159 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:13:22,380 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:13:22,380 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:13:22,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:13:22,381 INFO L82 PathProgramCache]: Analyzing trace with hash 1099206658, now seen corresponding path program 5 times [2021-03-10 23:13:22,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:13:22,381 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020191996] [2021-03-10 23:13:22,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:13:22,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:13:22,456 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:13:22,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020191996] [2021-03-10 23:13:22,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77055400] [2021-03-10 23:13:22,456 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:13:22,486 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 23:13:22,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:13:22,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 23:13:22,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:13:23,076 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:13:23,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:23,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:23,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:23,080 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-03-10 23:13:23,082 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:13:23,089 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:13:23,091 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:13:23,091 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:38, output treesize:3 [2021-03-10 23:13:23,099 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:13:23,100 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:13:23,100 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-03-10 23:13:23,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247812521] [2021-03-10 23:13:23,100 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 23:13:23,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:13:23,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 23:13:23,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2021-03-10 23:13:23,103 INFO L87 Difference]: Start difference. First operand 48 states and 95 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:13:23,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:13:23,830 INFO L93 Difference]: Finished difference Result 207 states and 392 transitions. [2021-03-10 23:13:23,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 23:13:23,831 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-03-10 23:13:23,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:13:23,832 INFO L225 Difference]: With dead ends: 207 [2021-03-10 23:13:23,832 INFO L226 Difference]: Without dead ends: 86 [2021-03-10 23:13:23,832 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 911.7ms TimeCoverageRelationStatistics Valid=243, Invalid=947, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 23:13:23,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-03-10 23:13:23,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 41. [2021-03-10 23:13:23,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.9) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:13:23,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 76 transitions. [2021-03-10 23:13:23,837 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 76 transitions. Word has length 15 [2021-03-10 23:13:23,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:13:23,838 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 76 transitions. [2021-03-10 23:13:23,838 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:13:23,838 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 76 transitions. [2021-03-10 23:13:23,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 23:13:23,838 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:13:23,838 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:13:24,039 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-03-10 23:13:24,039 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:13:24,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:13:24,040 INFO L82 PathProgramCache]: Analyzing trace with hash -449307722, now seen corresponding path program 6 times [2021-03-10 23:13:24,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:13:24,040 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027675225] [2021-03-10 23:13:24,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:13:24,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:13:24,153 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:13:24,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027675225] [2021-03-10 23:13:24,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973262504] [2021-03-10 23:13:24,153 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:13:24,177 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 23:13:24,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:13:24,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 19 conjunts are in the unsatisfiable core [2021-03-10 23:13:24,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:13:24,231 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 11 treesize of output 7 [2021-03-10 23:13:24,232 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:13:24,234 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:13:24,234 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 23:13:24,234 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-03-10 23:13:24,241 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:13:24,242 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:13:24,242 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-03-10 23:13:24,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341563813] [2021-03-10 23:13:24,242 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 23:13:24,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:13:24,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 23:13:24,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-03-10 23:13:24,243 INFO L87 Difference]: Start difference. First operand 41 states and 76 transitions. Second operand has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 10 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:13:24,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:13:24,388 INFO L93 Difference]: Finished difference Result 87 states and 164 transitions. [2021-03-10 23:13:24,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 23:13:24,390 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 10 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 23:13:24,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:13:24,392 INFO L225 Difference]: With dead ends: 87 [2021-03-10 23:13:24,392 INFO L226 Difference]: Without dead ends: 71 [2021-03-10 23:13:24,393 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 166.8ms TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-03-10 23:13:24,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-03-10 23:13:24,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 36. [2021-03-10 23:13:24,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 35 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:13:24,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 66 transitions. [2021-03-10 23:13:24,403 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 66 transitions. Word has length 17 [2021-03-10 23:13:24,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:13:24,403 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 66 transitions. [2021-03-10 23:13:24,403 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 10 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:13:24,403 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 66 transitions. [2021-03-10 23:13:24,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 23:13:24,406 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:13:24,406 INFO L519 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:13:24,606 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:13:24,607 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:13:24,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:13:24,607 INFO L82 PathProgramCache]: Analyzing trace with hash -1020566793, now seen corresponding path program 7 times [2021-03-10 23:13:24,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:13:24,608 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776715264] [2021-03-10 23:13:24,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:13:24,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:13:24,658 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:13:24,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776715264] [2021-03-10 23:13:24,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124302488] [2021-03-10 23:13:24,658 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:13:24,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:13:24,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 23:13:24,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:13:24,749 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:13:24,749 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:13:24,749 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-03-10 23:13:24,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079859653] [2021-03-10 23:13:24,749 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 23:13:24,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:13:24,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 23:13:24,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-03-10 23:13:24,750 INFO L87 Difference]: Start difference. First operand 36 states and 66 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:13:24,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:13:24,771 INFO L93 Difference]: Finished difference Result 128 states and 229 transitions. [2021-03-10 23:13:24,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 23:13:24,772 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 23:13:24,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:13:24,773 INFO L225 Difference]: With dead ends: 128 [2021-03-10 23:13:24,773 INFO L226 Difference]: Without dead ends: 117 [2021-03-10 23:13:24,773 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 25.1ms TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-03-10 23:13:24,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-03-10 23:13:24,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 87. [2021-03-10 23:13:24,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 2.0813953488372094) internal successors, (179), 86 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:13:24,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 179 transitions. [2021-03-10 23:13:24,791 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 179 transitions. Word has length 18 [2021-03-10 23:13:24,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:13:24,791 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 179 transitions. [2021-03-10 23:13:24,791 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:13:24,791 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 179 transitions. [2021-03-10 23:13:24,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 23:13:24,793 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:13:24,793 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:13:25,007 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:13:25,008 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:13:25,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:13:25,008 INFO L82 PathProgramCache]: Analyzing trace with hash -1344581694, now seen corresponding path program 8 times [2021-03-10 23:13:25,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:13:25,008 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132366334] [2021-03-10 23:13:25,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:13:25,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:13:25,154 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:13:25,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132366334] [2021-03-10 23:13:25,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410085742] [2021-03-10 23:13:25,155 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 23:13:25,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:13:25,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:13:25,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 23:13:25,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:13:25,238 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 11 treesize of output 7 [2021-03-10 23:13:25,239 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:13:25,240 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:13:25,241 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 23:13:25,241 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-03-10 23:13:25,247 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:13:25,247 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:13:25,247 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-03-10 23:13:25,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072043264] [2021-03-10 23:13:25,249 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 23:13:25,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:13:25,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 23:13:25,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2021-03-10 23:13:25,249 INFO L87 Difference]: Start difference. First operand 87 states and 179 transitions. Second operand has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:13:25,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:13:25,459 INFO L93 Difference]: Finished difference Result 179 states and 337 transitions. [2021-03-10 23:13:25,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 23:13:25,460 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 23:13:25,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:13:25,461 INFO L225 Difference]: With dead ends: 179 [2021-03-10 23:13:25,461 INFO L226 Difference]: Without dead ends: 105 [2021-03-10 23:13:25,462 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 236.3ms TimeCoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2021-03-10 23:13:25,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-03-10 23:13:25,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 41. [2021-03-10 23:13:25,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.9) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:13:25,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 76 transitions. [2021-03-10 23:13:25,468 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 76 transitions. Word has length 19 [2021-03-10 23:13:25,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:13:25,468 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 76 transitions. [2021-03-10 23:13:25,468 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:13:25,468 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 76 transitions. [2021-03-10 23:13:25,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 23:13:25,469 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:13:25,469 INFO L519 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:13:25,671 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-03-10 23:13:25,671 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:13:25,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:13:25,671 INFO L82 PathProgramCache]: Analyzing trace with hash 1290711147, now seen corresponding path program 9 times [2021-03-10 23:13:25,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:13:25,672 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020336061] [2021-03-10 23:13:25,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:13:25,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:13:25,735 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:13:25,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020336061] [2021-03-10 23:13:25,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553062850] [2021-03-10 23:13:25,735 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 23:13:25,776 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 23:13:25,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:13:25,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 23:13:25,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:13:25,830 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:13:25,830 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:13:25,830 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-03-10 23:13:25,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374405496] [2021-03-10 23:13:25,831 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 23:13:25,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:13:25,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 23:13:25,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-03-10 23:13:25,831 INFO L87 Difference]: Start difference. First operand 41 states and 76 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:13:25,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:13:25,850 INFO L93 Difference]: Finished difference Result 160 states and 290 transitions. [2021-03-10 23:13:25,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 23:13:25,850 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 23:13:25,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:13:25,852 INFO L225 Difference]: With dead ends: 160 [2021-03-10 23:13:25,852 INFO L226 Difference]: Without dead ends: 147 [2021-03-10 23:13:25,854 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 28.7ms TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-03-10 23:13:25,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-03-10 23:13:25,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 111. [2021-03-10 23:13:25,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.090909090909091) internal successors, (230), 110 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:13:25,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 230 transitions. [2021-03-10 23:13:25,865 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 230 transitions. Word has length 20 [2021-03-10 23:13:25,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:13:25,865 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 230 transitions. [2021-03-10 23:13:25,865 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:13:25,865 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 230 transitions. [2021-03-10 23:13:25,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 23:13:25,870 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:13:25,870 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:13:26,079 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:13:26,079 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:13:26,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:13:26,080 INFO L82 PathProgramCache]: Analyzing trace with hash -849963402, now seen corresponding path program 10 times [2021-03-10 23:13:26,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:13:26,080 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061748599] [2021-03-10 23:13:26,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:13:26,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:13:26,271 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:13:26,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061748599] [2021-03-10 23:13:26,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787345450] [2021-03-10 23:13:26,272 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 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 23:13:26,295 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:13:26,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:13:26,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-10 23:13:26,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:13:26,350 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 11 treesize of output 7 [2021-03-10 23:13:26,351 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:13:26,353 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:13:26,353 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 23:13:26,353 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-03-10 23:13:26,360 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:13:26,360 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:13:26,360 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-03-10 23:13:26,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260190391] [2021-03-10 23:13:26,360 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 23:13:26,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:13:26,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 23:13:26,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2021-03-10 23:13:26,361 INFO L87 Difference]: Start difference. First operand 111 states and 230 transitions. Second operand has 15 states, 15 states have (on average 1.4) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:13:26,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:13:26,645 INFO L93 Difference]: Finished difference Result 229 states and 435 transitions. [2021-03-10 23:13:26,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 23:13:26,646 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.4) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 23:13:26,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:13:26,647 INFO L225 Difference]: With dead ends: 229 [2021-03-10 23:13:26,647 INFO L226 Difference]: Without dead ends: 135 [2021-03-10 23:13:26,647 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 333.8ms TimeCoverageRelationStatistics Valid=135, Invalid=567, Unknown=0, NotChecked=0, Total=702 [2021-03-10 23:13:26,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-03-10 23:13:26,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 46. [2021-03-10 23:13:26,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.9111111111111112) internal successors, (86), 45 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:13:26,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 86 transitions. [2021-03-10 23:13:26,650 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 86 transitions. Word has length 21 [2021-03-10 23:13:26,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:13:26,650 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 86 transitions. [2021-03-10 23:13:26,650 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.4) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:13:26,650 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 86 transitions. [2021-03-10 23:13:26,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 23:13:26,651 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:13:26,651 INFO L519 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:13:26,867 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:13:26,867 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:13:26,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:13:26,868 INFO L82 PathProgramCache]: Analyzing trace with hash -555990985, now seen corresponding path program 11 times [2021-03-10 23:13:26,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:13:26,868 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584958481] [2021-03-10 23:13:26,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:13:26,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:13:26,933 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:13:26,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584958481] [2021-03-10 23:13:26,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759752570] [2021-03-10 23:13:26,933 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 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 23:13:26,975 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 23:13:26,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:13:26,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 23:13:26,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:13:27,040 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:13:27,041 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:13:27,041 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-03-10 23:13:27,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314003627] [2021-03-10 23:13:27,042 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 23:13:27,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:13:27,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 23:13:27,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-03-10 23:13:27,043 INFO L87 Difference]: Start difference. First operand 46 states and 86 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:13:27,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:13:27,063 INFO L93 Difference]: Finished difference Result 195 states and 357 transitions. [2021-03-10 23:13:27,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 23:13:27,064 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 23:13:27,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:13:27,065 INFO L225 Difference]: With dead ends: 195 [2021-03-10 23:13:27,065 INFO L226 Difference]: Without dead ends: 180 [2021-03-10 23:13:27,065 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 37.8ms TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-03-10 23:13:27,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-03-10 23:13:27,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 138. [2021-03-10 23:13:27,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 2.0948905109489053) internal successors, (287), 137 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:13:27,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 287 transitions. [2021-03-10 23:13:27,072 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 287 transitions. Word has length 22 [2021-03-10 23:13:27,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:13:27,072 INFO L480 AbstractCegarLoop]: Abstraction has 138 states and 287 transitions. [2021-03-10 23:13:27,072 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:13:27,072 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 287 transitions. [2021-03-10 23:13:27,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 23:13:27,073 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:13:27,073 INFO L519 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:13:27,273 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-03-10 23:13:27,273 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:13:27,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:13:27,274 INFO L82 PathProgramCache]: Analyzing trace with hash -454897790, now seen corresponding path program 12 times [2021-03-10 23:13:27,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:13:27,274 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229438062] [2021-03-10 23:13:27,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:13:27,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:13:27,466 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:13:27,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229438062] [2021-03-10 23:13:27,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301516347] [2021-03-10 23:13:27,466 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:13:27,504 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 23:13:27,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:13:27,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 23:13:27,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:13:27,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:13:27,991 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 23:13:27,992 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:13:27,997 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:13:27,998 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 23:13:27,998 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:19, output treesize:3 [2021-03-10 23:13:28,006 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 21 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:13:28,006 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:13:28,006 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-03-10 23:13:28,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494833458] [2021-03-10 23:13:28,007 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-03-10 23:13:28,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:13:28,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-03-10 23:13:28,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=780, Unknown=0, NotChecked=0, Total=930 [2021-03-10 23:13:28,008 INFO L87 Difference]: Start difference. First operand 138 states and 287 transitions. Second operand has 31 states, 31 states have (on average 1.3225806451612903) internal successors, (41), 30 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:13:29,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:13:29,642 INFO L93 Difference]: Finished difference Result 869 states and 1674 transitions. [2021-03-10 23:13:29,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-03-10 23:13:29,642 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.3225806451612903) internal successors, (41), 30 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-10 23:13:29,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:13:29,645 INFO L225 Difference]: With dead ends: 869 [2021-03-10 23:13:29,645 INFO L226 Difference]: Without dead ends: 472 [2021-03-10 23:13:29,646 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1485 ImplicationChecksByTransitivity, 1763.3ms TimeCoverageRelationStatistics Valid=1224, Invalid=5256, Unknown=0, NotChecked=0, Total=6480 [2021-03-10 23:13:29,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2021-03-10 23:13:29,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 150. [2021-03-10 23:13:29,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 2.1006711409395975) internal successors, (313), 149 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:13:29,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 313 transitions. [2021-03-10 23:13:29,654 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 313 transitions. Word has length 23 [2021-03-10 23:13:29,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:13:29,654 INFO L480 AbstractCegarLoop]: Abstraction has 150 states and 313 transitions. [2021-03-10 23:13:29,654 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.3225806451612903) internal successors, (41), 30 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:13:29,655 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 313 transitions. [2021-03-10 23:13:29,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 23:13:29,657 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:13:29,657 INFO L519 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:13:29,878 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-03-10 23:13:29,879 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:13:29,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:13:29,879 INFO L82 PathProgramCache]: Analyzing trace with hash 1467420982, now seen corresponding path program 13 times [2021-03-10 23:13:29,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:13:29,880 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889257296] [2021-03-10 23:13:29,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:13:29,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:13:30,110 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:13:30,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889257296] [2021-03-10 23:13:30,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250057097] [2021-03-10 23:13:30,111 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 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 23:13:30,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:13:30,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 35 conjunts are in the unsatisfiable core [2021-03-10 23:13:30,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:13:30,198 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 11 treesize of output 7 [2021-03-10 23:13:30,199 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:13:30,201 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:13:30,201 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 23:13:30,201 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-03-10 23:13:30,207 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:13:30,208 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:13:30,208 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-03-10 23:13:30,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136680597] [2021-03-10 23:13:30,208 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 23:13:30,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:13:30,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 23:13:30,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2021-03-10 23:13:30,209 INFO L87 Difference]: Start difference. First operand 150 states and 313 transitions. Second operand has 19 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:13:30,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:13:30,621 INFO L93 Difference]: Finished difference Result 325 states and 626 transitions. [2021-03-10 23:13:30,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 23:13:30,622 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 23:13:30,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:13:30,623 INFO L225 Difference]: With dead ends: 325 [2021-03-10 23:13:30,623 INFO L226 Difference]: Without dead ends: 205 [2021-03-10 23:13:30,623 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 457.9ms TimeCoverageRelationStatistics Valid=211, Invalid=979, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 23:13:30,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-03-10 23:13:30,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 56. [2021-03-10 23:13:30,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.9272727272727272) internal successors, (106), 55 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:13:30,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 106 transitions. [2021-03-10 23:13:30,626 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 106 transitions. Word has length 25 [2021-03-10 23:13:30,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:13:30,626 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 106 transitions. [2021-03-10 23:13:30,626 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:13:30,626 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 106 transitions. [2021-03-10 23:13:30,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 23:13:30,627 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:13:30,627 INFO L519 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:13:30,843 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-03-10 23:13:30,843 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:13:30,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:13:30,843 INFO L82 PathProgramCache]: Analyzing trace with hash -1731519113, now seen corresponding path program 14 times [2021-03-10 23:13:30,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:13:30,844 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996652680] [2021-03-10 23:13:30,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:13:30,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:13:30,919 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:13:30,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996652680] [2021-03-10 23:13:30,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469454130] [2021-03-10 23:13:30,919 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 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 23:13:30,953 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:13:30,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:13:30,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 23:13:30,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:13:31,019 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:13:31,019 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:13:31,019 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-03-10 23:13:31,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074436717] [2021-03-10 23:13:31,019 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 23:13:31,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:13:31,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 23:13:31,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-03-10 23:13:31,020 INFO L87 Difference]: Start difference. First operand 56 states and 106 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) 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 23:13:31,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:13:31,047 INFO L93 Difference]: Finished difference Result 274 states and 509 transitions. [2021-03-10 23:13:31,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 23:13:31,048 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) 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 26 [2021-03-10 23:13:31,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:13:31,049 INFO L225 Difference]: With dead ends: 274 [2021-03-10 23:13:31,049 INFO L226 Difference]: Without dead ends: 255 [2021-03-10 23:13:31,049 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 49.4ms TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-03-10 23:13:31,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-03-10 23:13:31,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 201. [2021-03-10 23:13:31,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 2.095) internal successors, (419), 200 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:13:31,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 419 transitions. [2021-03-10 23:13:31,056 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 419 transitions. Word has length 26 [2021-03-10 23:13:31,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:13:31,056 INFO L480 AbstractCegarLoop]: Abstraction has 201 states and 419 transitions. [2021-03-10 23:13:31,056 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.4166666666666665) 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 23:13:31,056 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 419 transitions. [2021-03-10 23:13:31,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-10 23:13:31,056 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:13:31,057 INFO L519 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:13:31,263 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:13:31,263 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:13:31,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:13:31,264 INFO L82 PathProgramCache]: Analyzing trace with hash 252907330, now seen corresponding path program 15 times [2021-03-10 23:13:31,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:13:31,264 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164314258] [2021-03-10 23:13:31,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:13:31,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:13:31,529 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:13:31,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164314258] [2021-03-10 23:13:31,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859567889] [2021-03-10 23:13:31,530 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:13:31,558 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-10 23:13:31,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:13:31,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 39 conjunts are in the unsatisfiable core [2021-03-10 23:13:31,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:13:31,632 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 11 treesize of output 7 [2021-03-10 23:13:31,633 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:13:31,635 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:13:31,635 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 23:13:31,635 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-03-10 23:13:31,641 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:13:31,641 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:13:31,641 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2021-03-10 23:13:31,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562264144] [2021-03-10 23:13:31,642 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 23:13:31,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:13:31,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 23:13:31,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2021-03-10 23:13:31,643 INFO L87 Difference]: Start difference. First operand 201 states and 419 transitions. Second operand has 21 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 20 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 23:13:32,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:13:32,217 INFO L93 Difference]: Finished difference Result 415 states and 801 transitions. [2021-03-10 23:13:32,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 23:13:32,218 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-03-10 23:13:32,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:13:32,220 INFO L225 Difference]: With dead ends: 415 [2021-03-10 23:13:32,220 INFO L226 Difference]: Without dead ends: 249 [2021-03-10 23:13:32,221 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 607.7ms TimeCoverageRelationStatistics Valid=255, Invalid=1227, Unknown=0, NotChecked=0, Total=1482 [2021-03-10 23:13:32,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-03-10 23:13:32,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 61. [2021-03-10 23:13:32,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.9333333333333333) internal successors, (116), 60 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:13:32,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 116 transitions. [2021-03-10 23:13:32,224 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 116 transitions. Word has length 27 [2021-03-10 23:13:32,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:13:32,224 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 116 transitions. [2021-03-10 23:13:32,224 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 20 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 23:13:32,224 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 116 transitions. [2021-03-10 23:13:32,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 23:13:32,224 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:13:32,224 INFO L519 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:13:32,446 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-03-10 23:13:32,446 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:13:32,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:13:32,447 INFO L82 PathProgramCache]: Analyzing trace with hash -726736661, now seen corresponding path program 16 times [2021-03-10 23:13:32,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:13:32,447 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797528283] [2021-03-10 23:13:32,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:13:32,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:13:32,536 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:13:32,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797528283] [2021-03-10 23:13:32,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690100891] [2021-03-10 23:13:32,536 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:13:32,566 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:13:32,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:13:32,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 23:13:32,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:13:32,641 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:13:32,641 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:13:32,641 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-03-10 23:13:32,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345602597] [2021-03-10 23:13:32,642 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 23:13:32,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:13:32,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 23:13:32,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-03-10 23:13:32,643 INFO L87 Difference]: Start difference. First operand 61 states and 116 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 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 23:13:32,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:13:32,670 INFO L93 Difference]: Finished difference Result 318 states and 594 transitions. [2021-03-10 23:13:32,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 23:13:32,671 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-03-10 23:13:32,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:13:32,672 INFO L225 Difference]: With dead ends: 318 [2021-03-10 23:13:32,672 INFO L226 Difference]: Without dead ends: 297 [2021-03-10 23:13:32,672 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 60.3ms TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-03-10 23:13:32,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2021-03-10 23:13:32,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 237. [2021-03-10 23:13:32,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 236 states have (on average 2.093220338983051) internal successors, (494), 236 states have internal predecessors, (494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:13:32,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 494 transitions. [2021-03-10 23:13:32,678 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 494 transitions. Word has length 28 [2021-03-10 23:13:32,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:13:32,678 INFO L480 AbstractCegarLoop]: Abstraction has 237 states and 494 transitions. [2021-03-10 23:13:32,678 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 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 23:13:32,678 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 494 transitions. [2021-03-10 23:13:32,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 23:13:32,679 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:13:32,679 INFO L519 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:13:32,901 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-03-10 23:13:32,901 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:13:32,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:13:32,901 INFO L82 PathProgramCache]: Analyzing trace with hash -658404362, now seen corresponding path program 17 times [2021-03-10 23:13:32,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:13:32,902 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659193791] [2021-03-10 23:13:32,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:13:32,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:13:33,181 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:13:33,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659193791] [2021-03-10 23:13:33,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864689166] [2021-03-10 23:13:33,182 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:13:33,207 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 23:13:33,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:13:33,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 23:13:33,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:13:33,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:13:33,992 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 23:13:33,993 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:13:33,997 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:13:33,999 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 23:13:33,999 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:19, output treesize:3 [2021-03-10 23:13:34,006 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 45 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:13:34,006 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:13:34,006 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-03-10 23:13:34,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292747714] [2021-03-10 23:13:34,007 INFO L460 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-03-10 23:13:34,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:13:34,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-03-10 23:13:34,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=1533, Unknown=0, NotChecked=0, Total=1806 [2021-03-10 23:13:34,009 INFO L87 Difference]: Start difference. First operand 237 states and 494 transitions. Second operand has 43 states, 43 states have (on average 1.2325581395348837) internal successors, (53), 42 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:13:37,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:13:37,791 INFO L93 Difference]: Finished difference Result 1727 states and 3354 transitions. [2021-03-10 23:13:37,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-03-10 23:13:37,792 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.2325581395348837) internal successors, (53), 42 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-03-10 23:13:37,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:13:37,796 INFO L225 Difference]: With dead ends: 1727 [2021-03-10 23:13:37,796 INFO L226 Difference]: Without dead ends: 1012 [2021-03-10 23:13:37,800 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4325 ImplicationChecksByTransitivity, 3955.2ms TimeCoverageRelationStatistics Valid=2986, Invalid=13526, Unknown=0, NotChecked=0, Total=16512 [2021-03-10 23:13:37,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1012 states. [2021-03-10 23:13:37,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1012 to 252. [2021-03-10 23:13:37,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 2.095617529880478) internal successors, (526), 251 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:13:37,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 526 transitions. [2021-03-10 23:13:37,810 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 526 transitions. Word has length 29 [2021-03-10 23:13:37,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:13:37,810 INFO L480 AbstractCegarLoop]: Abstraction has 252 states and 526 transitions. [2021-03-10 23:13:37,810 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.2325581395348837) internal successors, (53), 42 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:13:37,810 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 526 transitions. [2021-03-10 23:13:37,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-03-10 23:13:37,811 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:13:37,811 INFO L519 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:13:38,027 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:13:38,027 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:13:38,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:13:38,028 INFO L82 PathProgramCache]: Analyzing trace with hash -1964765438, now seen corresponding path program 18 times [2021-03-10 23:13:38,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:13:38,028 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040516261] [2021-03-10 23:13:38,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:13:38,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:13:38,428 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:13:38,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040516261] [2021-03-10 23:13:38,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394981270] [2021-03-10 23:13:38,428 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:13:38,468 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-03-10 23:13:38,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:13:38,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 47 conjunts are in the unsatisfiable core [2021-03-10 23:13:38,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:13:38,537 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 11 treesize of output 7 [2021-03-10 23:13:38,538 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:13:38,539 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:13:38,540 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 23:13:38,540 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-03-10 23:13:38,546 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:13:38,546 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:13:38,546 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2021-03-10 23:13:38,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365441664] [2021-03-10 23:13:38,546 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 23:13:38,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:13:38,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 23:13:38,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2021-03-10 23:13:38,547 INFO L87 Difference]: Start difference. First operand 252 states and 526 transitions. Second operand has 25 states, 25 states have (on average 1.24) internal successors, (31), 24 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 23:13:39,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:13:39,263 INFO L93 Difference]: Finished difference Result 541 states and 1052 transitions. [2021-03-10 23:13:39,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 23:13:39,263 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.24) internal successors, (31), 24 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 31 [2021-03-10 23:13:39,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:13:39,265 INFO L225 Difference]: With dead ends: 541 [2021-03-10 23:13:39,265 INFO L226 Difference]: Without dead ends: 343 [2021-03-10 23:13:39,265 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 853.6ms TimeCoverageRelationStatistics Valid=355, Invalid=1807, Unknown=0, NotChecked=0, Total=2162 [2021-03-10 23:13:39,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2021-03-10 23:13:39,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 71. [2021-03-10 23:13:39,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.9428571428571428) internal successors, (136), 70 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:13:39,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 136 transitions. [2021-03-10 23:13:39,269 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 136 transitions. Word has length 31 [2021-03-10 23:13:39,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:13:39,269 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 136 transitions. [2021-03-10 23:13:39,269 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.24) internal successors, (31), 24 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 23:13:39,269 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 136 transitions. [2021-03-10 23:13:39,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 23:13:39,270 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:13:39,270 INFO L519 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:13:39,492 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:13:39,492 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:13:39,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:13:39,492 INFO L82 PathProgramCache]: Analyzing trace with hash -755115733, now seen corresponding path program 19 times [2021-03-10 23:13:39,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:13:39,493 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910566956] [2021-03-10 23:13:39,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:13:39,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:13:39,620 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 78 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:13:39,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910566956] [2021-03-10 23:13:39,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723273999] [2021-03-10 23:13:39,620 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:13:39,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:13:39,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 23:13:39,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:13:39,729 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 78 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:13:39,729 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:13:39,729 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-03-10 23:13:39,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743927289] [2021-03-10 23:13:39,731 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 23:13:39,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:13:39,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 23:13:39,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-03-10 23:13:39,732 INFO L87 Difference]: Start difference. First operand 71 states and 136 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) 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 23:13:39,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:13:39,766 INFO L93 Difference]: Finished difference Result 415 states and 782 transitions. [2021-03-10 23:13:39,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 23:13:39,767 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) 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 32 [2021-03-10 23:13:39,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:13:39,768 INFO L225 Difference]: With dead ends: 415 [2021-03-10 23:13:39,768 INFO L226 Difference]: Without dead ends: 390 [2021-03-10 23:13:39,769 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 83.8ms TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-03-10 23:13:39,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2021-03-10 23:13:39,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 318. [2021-03-10 23:13:39,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 317 states have (on average 2.088328075709779) internal successors, (662), 317 states have internal predecessors, (662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:13:39,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 662 transitions. [2021-03-10 23:13:39,776 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 662 transitions. Word has length 32 [2021-03-10 23:13:39,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:13:39,777 INFO L480 AbstractCegarLoop]: Abstraction has 318 states and 662 transitions. [2021-03-10 23:13:39,777 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.3333333333333335) 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 23:13:39,777 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 662 transitions. [2021-03-10 23:13:39,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-03-10 23:13:39,777 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:13:39,778 INFO L519 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:13:40,000 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:13:40,000 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:13:40,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:13:40,000 INFO L82 PathProgramCache]: Analyzing trace with hash -396491082, now seen corresponding path program 20 times [2021-03-10 23:13:40,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:13:40,001 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391761153] [2021-03-10 23:13:40,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:13:40,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:13:40,413 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:13:40,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391761153] [2021-03-10 23:13:40,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920688718] [2021-03-10 23:13:40,413 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:13:40,441 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:13:40,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:13:40,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 51 conjunts are in the unsatisfiable core [2021-03-10 23:13:40,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:13:40,531 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 11 treesize of output 7 [2021-03-10 23:13:40,533 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:13:40,534 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:13:40,535 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 23:13:40,535 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-03-10 23:13:40,542 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:13:40,542 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:13:40,542 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2021-03-10 23:13:40,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169129238] [2021-03-10 23:13:40,542 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-03-10 23:13:40,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:13:40,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-03-10 23:13:40,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2021-03-10 23:13:40,543 INFO L87 Difference]: Start difference. First operand 318 states and 662 transitions. Second operand has 27 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 26 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 23:13:41,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:13:41,362 INFO L93 Difference]: Finished difference Result 655 states and 1275 transitions. [2021-03-10 23:13:41,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 23:13:41,363 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 26 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 33 [2021-03-10 23:13:41,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:13:41,364 INFO L225 Difference]: With dead ends: 655 [2021-03-10 23:13:41,364 INFO L226 Difference]: Without dead ends: 399 [2021-03-10 23:13:41,365 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 963.1ms TimeCoverageRelationStatistics Valid=411, Invalid=2139, Unknown=0, NotChecked=0, Total=2550 [2021-03-10 23:13:41,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2021-03-10 23:13:41,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 76. [2021-03-10 23:13:41,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.9466666666666668) internal successors, (146), 75 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:13:41,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 146 transitions. [2021-03-10 23:13:41,368 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 146 transitions. Word has length 33 [2021-03-10 23:13:41,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:13:41,369 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 146 transitions. [2021-03-10 23:13:41,369 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 26 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 23:13:41,369 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 146 transitions. [2021-03-10 23:13:41,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-03-10 23:13:41,369 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:13:41,369 INFO L519 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:13:41,583 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-03-10 23:13:41,583 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:13:41,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:13:41,584 INFO L82 PathProgramCache]: Analyzing trace with hash 616749047, now seen corresponding path program 21 times [2021-03-10 23:13:41,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:13:41,584 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155561637] [2021-03-10 23:13:41,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:13:41,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:13:41,713 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:13:41,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155561637] [2021-03-10 23:13:41,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69501060] [2021-03-10 23:13:41,714 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 23:13:41,745 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-03-10 23:13:41,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:13:41,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-10 23:13:41,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:13:41,855 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:13:41,856 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:13:41,856 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-03-10 23:13:41,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122640668] [2021-03-10 23:13:41,857 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 23:13:41,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:13:41,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 23:13:41,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-03-10 23:13:41,857 INFO L87 Difference]: Start difference. First operand 76 states and 146 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 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 23:13:41,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:13:41,894 INFO L93 Difference]: Finished difference Result 468 states and 885 transitions. [2021-03-10 23:13:41,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 23:13:41,895 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 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 34 [2021-03-10 23:13:41,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:13:41,896 INFO L225 Difference]: With dead ends: 468 [2021-03-10 23:13:41,897 INFO L226 Difference]: Without dead ends: 441 [2021-03-10 23:13:41,897 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 94.6ms TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-03-10 23:13:41,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2021-03-10 23:13:41,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 363. [2021-03-10 23:13:41,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 362 states have (on average 2.085635359116022) internal successors, (755), 362 states have internal predecessors, (755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:13:41,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 755 transitions. [2021-03-10 23:13:41,905 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 755 transitions. Word has length 34 [2021-03-10 23:13:41,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:13:41,905 INFO L480 AbstractCegarLoop]: Abstraction has 363 states and 755 transitions. [2021-03-10 23:13:41,905 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 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 23:13:41,905 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 755 transitions. [2021-03-10 23:13:41,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-03-10 23:13:41,906 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:13:41,906 INFO L519 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:13:42,106 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-03-10 23:13:42,106 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:13:42,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:13:42,107 INFO L82 PathProgramCache]: Analyzing trace with hash 1657654978, now seen corresponding path program 22 times [2021-03-10 23:13:42,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:13:42,107 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007198376] [2021-03-10 23:13:42,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:13:42,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:13:42,529 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:13:42,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007198376] [2021-03-10 23:13:42,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143837946] [2021-03-10 23:13:42,530 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 23:13:42,559 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:13:42,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:13:42,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 55 conjunts are in the unsatisfiable core [2021-03-10 23:13:42,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:13:42,640 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 11 treesize of output 7 [2021-03-10 23:13:42,641 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:13:42,642 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:13:42,643 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 23:13:42,643 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-03-10 23:13:42,650 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:13:42,650 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:13:42,650 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2021-03-10 23:13:42,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666709887] [2021-03-10 23:13:42,650 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-03-10 23:13:42,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:13:42,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-03-10 23:13:42,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2021-03-10 23:13:42,651 INFO L87 Difference]: Start difference. First operand 363 states and 755 transitions. Second operand has 29 states, 29 states have (on average 1.206896551724138) internal successors, (35), 28 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 23:13:43,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:13:43,673 INFO L93 Difference]: Finished difference Result 747 states and 1457 transitions. [2021-03-10 23:13:43,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-10 23:13:43,686 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.206896551724138) internal successors, (35), 28 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 35 [2021-03-10 23:13:43,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:13:43,687 INFO L225 Difference]: With dead ends: 747 [2021-03-10 23:13:43,687 INFO L226 Difference]: Without dead ends: 457 [2021-03-10 23:13:43,688 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 1107.4ms TimeCoverageRelationStatistics Valid=471, Invalid=2499, Unknown=0, NotChecked=0, Total=2970 [2021-03-10 23:13:43,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2021-03-10 23:13:43,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 81. [2021-03-10 23:13:43,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.95) internal successors, (156), 80 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:13:43,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 156 transitions. [2021-03-10 23:13:43,691 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 156 transitions. Word has length 35 [2021-03-10 23:13:43,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:13:43,692 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 156 transitions. [2021-03-10 23:13:43,692 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.206896551724138) internal successors, (35), 28 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 23:13:43,692 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 156 transitions. [2021-03-10 23:13:43,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-03-10 23:13:43,692 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:13:43,692 INFO L519 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:13:43,914 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:13:43,914 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:13:43,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:13:43,914 INFO L82 PathProgramCache]: Analyzing trace with hash -129232533, now seen corresponding path program 23 times [2021-03-10 23:13:43,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:13:43,914 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614420556] [2021-03-10 23:13:43,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:13:43,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:13:44,052 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 105 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:13:44,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614420556] [2021-03-10 23:13:44,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722549459] [2021-03-10 23:13:44,053 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:13:44,086 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-03-10 23:13:44,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:13:44,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 28 conjunts are in the unsatisfiable core [2021-03-10 23:13:44,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:13:44,170 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 105 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:13:44,170 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:13:44,170 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-03-10 23:13:44,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500155736] [2021-03-10 23:13:44,170 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 23:13:44,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:13:44,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 23:13:44,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-03-10 23:13:44,171 INFO L87 Difference]: Start difference. First operand 81 states and 156 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 16 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 23:13:44,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:13:44,204 INFO L93 Difference]: Finished difference Result 524 states and 994 transitions. [2021-03-10 23:13:44,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 23:13:44,205 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 16 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 36 [2021-03-10 23:13:44,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:13:44,206 INFO L225 Difference]: With dead ends: 524 [2021-03-10 23:13:44,206 INFO L226 Difference]: Without dead ends: 495 [2021-03-10 23:13:44,206 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 105.8ms TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-03-10 23:13:44,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2021-03-10 23:13:44,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 411. [2021-03-10 23:13:44,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 410 states have (on average 2.0829268292682928) internal successors, (854), 410 states have internal predecessors, (854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:13:44,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 854 transitions. [2021-03-10 23:13:44,214 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 854 transitions. Word has length 36 [2021-03-10 23:13:44,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:13:44,214 INFO L480 AbstractCegarLoop]: Abstraction has 411 states and 854 transitions. [2021-03-10 23:13:44,214 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 16 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 23:13:44,214 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 854 transitions. [2021-03-10 23:13:44,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-03-10 23:13:44,215 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:13:44,215 INFO L519 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:13:44,431 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-03-10 23:13:44,431 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:13:44,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:13:44,431 INFO L82 PathProgramCache]: Analyzing trace with hash -546012810, now seen corresponding path program 24 times [2021-03-10 23:13:44,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:13:44,432 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294582845] [2021-03-10 23:13:44,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:13:44,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:13:44,975 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:13:44,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294582845] [2021-03-10 23:13:44,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040377385] [2021-03-10 23:13:44,975 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:13:45,005 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-03-10 23:13:45,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:13:45,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 59 conjunts are in the unsatisfiable core [2021-03-10 23:13:45,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:13:45,078 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 11 treesize of output 7 [2021-03-10 23:13:45,079 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:13:45,080 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:13:45,081 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 23:13:45,081 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-03-10 23:13:45,089 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:13:45,089 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:13:45,089 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2021-03-10 23:13:45,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460117023] [2021-03-10 23:13:45,089 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-03-10 23:13:45,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:13:45,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-03-10 23:13:45,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2021-03-10 23:13:45,090 INFO L87 Difference]: Start difference. First operand 411 states and 854 transitions. Second operand has 31 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 30 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 23:13:46,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:13:46,343 INFO L93 Difference]: Finished difference Result 845 states and 1651 transitions. [2021-03-10 23:13:46,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-03-10 23:13:46,350 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 30 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 37 [2021-03-10 23:13:46,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:13:46,352 INFO L225 Difference]: With dead ends: 845 [2021-03-10 23:13:46,352 INFO L226 Difference]: Without dead ends: 519 [2021-03-10 23:13:46,353 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 1408.5ms TimeCoverageRelationStatistics Valid=535, Invalid=2887, Unknown=0, NotChecked=0, Total=3422 [2021-03-10 23:13:46,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2021-03-10 23:13:46,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 86. [2021-03-10 23:13:46,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.9529411764705882) internal successors, (166), 85 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:13:46,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 166 transitions. [2021-03-10 23:13:46,358 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 166 transitions. Word has length 37 [2021-03-10 23:13:46,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:13:46,358 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 166 transitions. [2021-03-10 23:13:46,359 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 30 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 23:13:46,359 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 166 transitions. [2021-03-10 23:13:46,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-03-10 23:13:46,359 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:13:46,359 INFO L519 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:13:46,575 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:13:46,575 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:13:46,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:13:46,575 INFO L82 PathProgramCache]: Analyzing trace with hash 276542775, now seen corresponding path program 25 times [2021-03-10 23:13:46,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:13:46,576 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523554665] [2021-03-10 23:13:46,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:13:46,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:13:46,722 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 120 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:13:46,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523554665] [2021-03-10 23:13:46,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567005213] [2021-03-10 23:13:46,722 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:13:46,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:13:46,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-10 23:13:46,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:13:46,838 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 120 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:13:46,839 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:13:46,839 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 17 [2021-03-10 23:13:46,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015235752] [2021-03-10 23:13:46,839 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 23:13:46,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:13:46,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 23:13:46,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-03-10 23:13:46,840 INFO L87 Difference]: Start difference. First operand 86 states and 166 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:13:46,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:13:46,880 INFO L93 Difference]: Finished difference Result 583 states and 1109 transitions. [2021-03-10 23:13:46,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 23:13:46,881 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-03-10 23:13:46,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:13:46,882 INFO L225 Difference]: With dead ends: 583 [2021-03-10 23:13:46,882 INFO L226 Difference]: Without dead ends: 552 [2021-03-10 23:13:46,882 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 121.0ms TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-03-10 23:13:46,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2021-03-10 23:13:46,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 462. [2021-03-10 23:13:46,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 462 states, 461 states have (on average 2.0802603036876355) internal successors, (959), 461 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 23:13:46,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 959 transitions. [2021-03-10 23:13:46,891 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 959 transitions. Word has length 38 [2021-03-10 23:13:46,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:13:46,891 INFO L480 AbstractCegarLoop]: Abstraction has 462 states and 959 transitions. [2021-03-10 23:13:46,891 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:13:46,891 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 959 transitions. [2021-03-10 23:13:46,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-03-10 23:13:46,892 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:13:46,892 INFO L519 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:13:47,107 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-03-10 23:13:47,107 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:13:47,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:13:47,107 INFO L82 PathProgramCache]: Analyzing trace with hash -817344894, now seen corresponding path program 26 times [2021-03-10 23:13:47,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:13:47,108 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108330723] [2021-03-10 23:13:47,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:13:47,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:13:47,741 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:13:47,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108330723] [2021-03-10 23:13:47,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478629079] [2021-03-10 23:13:47,741 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:13:47,769 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:13:47,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:13:47,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 63 conjunts are in the unsatisfiable core [2021-03-10 23:13:47,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:13:47,873 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 11 treesize of output 7 [2021-03-10 23:13:47,874 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:13:47,875 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:13:47,876 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 23:13:47,876 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-03-10 23:13:47,882 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:13:47,882 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:13:47,882 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2021-03-10 23:13:47,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827187369] [2021-03-10 23:13:47,882 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-03-10 23:13:47,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:13:47,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-03-10 23:13:47,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=993, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 23:13:47,884 INFO L87 Difference]: Start difference. First operand 462 states and 959 transitions. Second operand has 33 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 32 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 23:13:49,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:13:49,199 INFO L93 Difference]: Finished difference Result 949 states and 1857 transitions. [2021-03-10 23:13:49,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-03-10 23:13:49,199 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 32 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 39 [2021-03-10 23:13:49,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:13:49,200 INFO L225 Difference]: With dead ends: 949 [2021-03-10 23:13:49,200 INFO L226 Difference]: Without dead ends: 585 [2021-03-10 23:13:49,201 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 1506.9ms TimeCoverageRelationStatistics Valid=603, Invalid=3303, Unknown=0, NotChecked=0, Total=3906 [2021-03-10 23:13:49,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2021-03-10 23:13:49,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 91. [2021-03-10 23:13:49,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.9555555555555555) internal successors, (176), 90 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:13:49,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 176 transitions. [2021-03-10 23:13:49,204 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 176 transitions. Word has length 39 [2021-03-10 23:13:49,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:13:49,204 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 176 transitions. [2021-03-10 23:13:49,204 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 32 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 23:13:49,204 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 176 transitions. [2021-03-10 23:13:49,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-03-10 23:13:49,205 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:13:49,205 INFO L519 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:13:49,425 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-03-10 23:13:49,425 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:13:49,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:13:49,426 INFO L82 PathProgramCache]: Analyzing trace with hash 455182763, now seen corresponding path program 27 times [2021-03-10 23:13:49,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:13:49,426 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360052990] [2021-03-10 23:13:49,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:13:49,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:13:49,584 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 136 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:13:49,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360052990] [2021-03-10 23:13:49,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757493313] [2021-03-10 23:13:49,584 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 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 23:13:49,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-03-10 23:13:49,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:13:49,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 23:13:49,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:13:49,707 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 136 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:13:49,707 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:13:49,707 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 18 [2021-03-10 23:13:49,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655595661] [2021-03-10 23:13:49,708 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 23:13:49,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:13:49,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 23:13:49,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-03-10 23:13:49,708 INFO L87 Difference]: Start difference. First operand 91 states and 176 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:13:49,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:13:49,752 INFO L93 Difference]: Finished difference Result 645 states and 1230 transitions. [2021-03-10 23:13:49,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 23:13:49,752 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-03-10 23:13:49,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:13:49,753 INFO L225 Difference]: With dead ends: 645 [2021-03-10 23:13:49,753 INFO L226 Difference]: Without dead ends: 612 [2021-03-10 23:13:49,754 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 127.5ms TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-03-10 23:13:49,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2021-03-10 23:13:49,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 516. [2021-03-10 23:13:49,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 516 states, 515 states have (on average 2.0776699029126213) internal successors, (1070), 515 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:13:49,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 516 states to 516 states and 1070 transitions. [2021-03-10 23:13:49,761 INFO L78 Accepts]: Start accepts. Automaton has 516 states and 1070 transitions. Word has length 40 [2021-03-10 23:13:49,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:13:49,761 INFO L480 AbstractCegarLoop]: Abstraction has 516 states and 1070 transitions. [2021-03-10 23:13:49,761 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:13:49,761 INFO L276 IsEmpty]: Start isEmpty. Operand 516 states and 1070 transitions. [2021-03-10 23:13:49,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-03-10 23:13:49,762 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:13:49,762 INFO L519 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:13:49,983 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-03-10 23:13:49,983 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:13:49,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:13:49,983 INFO L82 PathProgramCache]: Analyzing trace with hash 1496120374, now seen corresponding path program 28 times [2021-03-10 23:13:49,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:13:49,983 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677707033] [2021-03-10 23:13:49,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:13:49,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:13:50,564 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:13:50,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677707033] [2021-03-10 23:13:50,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476809595] [2021-03-10 23:13:50,564 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 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 23:13:50,592 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:13:50,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:13:50,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 67 conjunts are in the unsatisfiable core [2021-03-10 23:13:50,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:13:50,673 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 11 treesize of output 7 [2021-03-10 23:13:50,674 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:13:50,675 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:13:50,676 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 23:13:50,676 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-03-10 23:13:50,681 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:13:50,681 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:13:50,681 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2021-03-10 23:13:50,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612358718] [2021-03-10 23:13:50,682 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-03-10 23:13:50,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:13:50,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-03-10 23:13:50,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 23:13:50,682 INFO L87 Difference]: Start difference. First operand 516 states and 1070 transitions. Second operand has 35 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 34 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:13:52,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:13:52,145 INFO L93 Difference]: Finished difference Result 1059 states and 2075 transitions. [2021-03-10 23:13:52,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-03-10 23:13:52,146 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 34 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-03-10 23:13:52,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:13:52,147 INFO L225 Difference]: With dead ends: 1059 [2021-03-10 23:13:52,147 INFO L226 Difference]: Without dead ends: 655 [2021-03-10 23:13:52,148 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 1608.4ms TimeCoverageRelationStatistics Valid=675, Invalid=3747, Unknown=0, NotChecked=0, Total=4422 [2021-03-10 23:13:52,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2021-03-10 23:13:52,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 96. [2021-03-10 23:13:52,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.9578947368421054) internal successors, (186), 95 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:13:52,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 186 transitions. [2021-03-10 23:13:52,152 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 186 transitions. Word has length 41 [2021-03-10 23:13:52,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:13:52,152 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 186 transitions. [2021-03-10 23:13:52,152 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 34 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:13:52,152 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 186 transitions. [2021-03-10 23:13:52,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-03-10 23:13:52,153 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:13:52,153 INFO L519 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:13:52,367 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:13:52,367 INFO L428 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:13:52,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:13:52,367 INFO L82 PathProgramCache]: Analyzing trace with hash -841837961, now seen corresponding path program 29 times [2021-03-10 23:13:52,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:13:52,368 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55982627] [2021-03-10 23:13:52,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:13:52,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:13:52,538 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 153 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:13:52,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55982627] [2021-03-10 23:13:52,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108260137] [2021-03-10 23:13:52,539 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 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 23:13:52,572 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-03-10 23:13:52,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:13:52,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-10 23:13:52,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:13:52,684 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 153 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:13:52,685 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:13:52,685 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 19 [2021-03-10 23:13:52,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766684012] [2021-03-10 23:13:52,685 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 23:13:52,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:13:52,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 23:13:52,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-03-10 23:13:52,685 INFO L87 Difference]: Start difference. First operand 96 states and 186 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:13:52,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:13:52,733 INFO L93 Difference]: Finished difference Result 710 states and 1357 transitions. [2021-03-10 23:13:52,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 23:13:52,734 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-03-10 23:13:52,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:13:52,735 INFO L225 Difference]: With dead ends: 710 [2021-03-10 23:13:52,735 INFO L226 Difference]: Without dead ends: 675 [2021-03-10 23:13:52,736 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 143.4ms TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-03-10 23:13:52,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 675 states. [2021-03-10 23:13:52,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 675 to 573. [2021-03-10 23:13:52,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 573 states, 572 states have (on average 2.075174825174825) internal successors, (1187), 572 states have internal predecessors, (1187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:13:52,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 573 states to 573 states and 1187 transitions. [2021-03-10 23:13:52,744 INFO L78 Accepts]: Start accepts. Automaton has 573 states and 1187 transitions. Word has length 42 [2021-03-10 23:13:52,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:13:52,744 INFO L480 AbstractCegarLoop]: Abstraction has 573 states and 1187 transitions. [2021-03-10 23:13:52,744 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:13:52,744 INFO L276 IsEmpty]: Start isEmpty. Operand 573 states and 1187 transitions. [2021-03-10 23:13:52,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-03-10 23:13:52,745 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:13:52,746 INFO L519 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:13:52,964 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-03-10 23:13:52,965 INFO L428 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:13:52,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:13:52,965 INFO L82 PathProgramCache]: Analyzing trace with hash -1228173758, now seen corresponding path program 30 times [2021-03-10 23:13:52,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:13:52,965 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144428518] [2021-03-10 23:13:52,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:13:52,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:13:53,660 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:13:53,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144428518] [2021-03-10 23:13:53,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489059935] [2021-03-10 23:13:53,660 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:13:53,693 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-03-10 23:13:53,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:13:53,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 71 conjunts are in the unsatisfiable core [2021-03-10 23:13:53,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:13:53,789 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 11 treesize of output 7 [2021-03-10 23:13:53,790 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:13:53,792 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:13:53,792 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 23:13:53,792 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-03-10 23:13:53,798 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:13:53,799 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:13:53,799 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2021-03-10 23:13:53,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103901182] [2021-03-10 23:13:53,799 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-03-10 23:13:53,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:13:53,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-03-10 23:13:53,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=1261, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 23:13:53,800 INFO L87 Difference]: Start difference. First operand 573 states and 1187 transitions. Second operand has 37 states, 37 states have (on average 1.162162162162162) internal successors, (43), 36 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:13:55,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:13:55,486 INFO L93 Difference]: Finished difference Result 1175 states and 2305 transitions. [2021-03-10 23:13:55,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-03-10 23:13:55,486 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.162162162162162) internal successors, (43), 36 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-03-10 23:13:55,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:13:55,488 INFO L225 Difference]: With dead ends: 1175 [2021-03-10 23:13:55,488 INFO L226 Difference]: Without dead ends: 729 [2021-03-10 23:13:55,489 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 561 ImplicationChecksByTransitivity, 1865.9ms TimeCoverageRelationStatistics Valid=751, Invalid=4219, Unknown=0, NotChecked=0, Total=4970 [2021-03-10 23:13:55,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 729 states. [2021-03-10 23:13:55,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 729 to 101. [2021-03-10 23:13:55,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.96) internal successors, (196), 100 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:13:55,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 196 transitions. [2021-03-10 23:13:55,493 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 196 transitions. Word has length 43 [2021-03-10 23:13:55,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:13:55,493 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 196 transitions. [2021-03-10 23:13:55,493 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.162162162162162) internal successors, (43), 36 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:13:55,493 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 196 transitions. [2021-03-10 23:13:55,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-03-10 23:13:55,493 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:13:55,493 INFO L519 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:13:55,706 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:13:55,706 INFO L428 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:13:55,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:13:55,707 INFO L82 PathProgramCache]: Analyzing trace with hash 604389867, now seen corresponding path program 31 times [2021-03-10 23:13:55,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:13:55,707 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739990786] [2021-03-10 23:13:55,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:13:55,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:13:55,919 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 171 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:13:55,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739990786] [2021-03-10 23:13:55,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237666429] [2021-03-10 23:13:55,919 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:13:55,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:13:55,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 36 conjunts are in the unsatisfiable core [2021-03-10 23:13:55,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:13:56,047 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 171 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:13:56,047 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:13:56,047 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 20 [2021-03-10 23:13:56,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39699781] [2021-03-10 23:13:56,047 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 23:13:56,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:13:56,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 23:13:56,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-03-10 23:13:56,048 INFO L87 Difference]: Start difference. First operand 101 states and 196 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 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 23:13:56,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:13:56,096 INFO L93 Difference]: Finished difference Result 778 states and 1490 transitions. [2021-03-10 23:13:56,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 23:13:56,096 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 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 44 [2021-03-10 23:13:56,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:13:56,098 INFO L225 Difference]: With dead ends: 778 [2021-03-10 23:13:56,098 INFO L226 Difference]: Without dead ends: 741 [2021-03-10 23:13:56,098 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 173.6ms TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-03-10 23:13:56,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 741 states. [2021-03-10 23:13:56,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 741 to 633. [2021-03-10 23:13:56,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 633 states, 632 states have (on average 2.0727848101265822) internal successors, (1310), 632 states have internal predecessors, (1310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:13:56,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 633 states to 633 states and 1310 transitions. [2021-03-10 23:13:56,107 INFO L78 Accepts]: Start accepts. Automaton has 633 states and 1310 transitions. Word has length 44 [2021-03-10 23:13:56,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:13:56,107 INFO L480 AbstractCegarLoop]: Abstraction has 633 states and 1310 transitions. [2021-03-10 23:13:56,107 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 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 23:13:56,107 INFO L276 IsEmpty]: Start isEmpty. Operand 633 states and 1310 transitions. [2021-03-10 23:13:56,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-03-10 23:13:56,108 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:13:56,108 INFO L519 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:13:56,311 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-03-10 23:13:56,311 INFO L428 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:13:56,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:13:56,311 INFO L82 PathProgramCache]: Analyzing trace with hash -1297123594, now seen corresponding path program 32 times [2021-03-10 23:13:56,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:13:56,311 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088065881] [2021-03-10 23:13:56,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:13:56,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:13:57,027 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:13:57,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088065881] [2021-03-10 23:13:57,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751169025] [2021-03-10 23:13:57,027 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 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 23:13:57,064 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:13:57,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:13:57,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 75 conjunts are in the unsatisfiable core [2021-03-10 23:13:57,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:13:57,169 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 11 treesize of output 7 [2021-03-10 23:13:57,170 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:13:57,171 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:13:57,172 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:13:57,172 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-03-10 23:13:57,178 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:13:57,178 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:13:57,178 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2021-03-10 23:13:57,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810533205] [2021-03-10 23:13:57,179 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-03-10 23:13:57,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:13:57,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-03-10 23:13:57,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=1407, Unknown=0, NotChecked=0, Total=1482 [2021-03-10 23:13:57,180 INFO L87 Difference]: Start difference. First operand 633 states and 1310 transitions. Second operand has 39 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 38 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:13:59,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:13:59,101 INFO L93 Difference]: Finished difference Result 1297 states and 2547 transitions. [2021-03-10 23:13:59,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-03-10 23:13:59,102 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 38 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-03-10 23:13:59,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:13:59,104 INFO L225 Difference]: With dead ends: 1297 [2021-03-10 23:13:59,104 INFO L226 Difference]: Without dead ends: 807 [2021-03-10 23:13:59,104 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 2070.9ms TimeCoverageRelationStatistics Valid=831, Invalid=4719, Unknown=0, NotChecked=0, Total=5550 [2021-03-10 23:13:59,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 807 states. [2021-03-10 23:13:59,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 807 to 106. [2021-03-10 23:13:59,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 1.9619047619047618) internal successors, (206), 105 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:13:59,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 206 transitions. [2021-03-10 23:13:59,110 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 206 transitions. Word has length 45 [2021-03-10 23:13:59,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:13:59,110 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 206 transitions. [2021-03-10 23:13:59,110 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 38 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:13:59,110 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 206 transitions. [2021-03-10 23:13:59,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-03-10 23:13:59,110 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:13:59,110 INFO L519 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:13:59,331 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-03-10 23:13:59,331 INFO L428 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:13:59,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:13:59,331 INFO L82 PathProgramCache]: Analyzing trace with hash -1533055049, now seen corresponding path program 33 times [2021-03-10 23:13:59,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:13:59,332 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637646849] [2021-03-10 23:13:59,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:13:59,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:13:59,551 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 190 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:13:59,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637646849] [2021-03-10 23:13:59,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230937423] [2021-03-10 23:13:59,552 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 23:13:59,587 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-03-10 23:13:59,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:13:59,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 38 conjunts are in the unsatisfiable core [2021-03-10 23:13:59,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:13:59,699 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 190 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:13:59,700 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:13:59,700 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 21 [2021-03-10 23:13:59,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629708087] [2021-03-10 23:13:59,700 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 23:13:59,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:13:59,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 23:13:59,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2021-03-10 23:13:59,700 INFO L87 Difference]: Start difference. First operand 106 states and 206 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:13:59,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:13:59,750 INFO L93 Difference]: Finished difference Result 849 states and 1629 transitions. [2021-03-10 23:13:59,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 23:13:59,750 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-03-10 23:13:59,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:13:59,752 INFO L225 Difference]: With dead ends: 849 [2021-03-10 23:13:59,752 INFO L226 Difference]: Without dead ends: 810 [2021-03-10 23:13:59,752 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 189.7ms TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2021-03-10 23:13:59,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 810 states. [2021-03-10 23:13:59,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 810 to 696. [2021-03-10 23:13:59,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 696 states, 695 states have (on average 2.0705035971223023) internal successors, (1439), 695 states have internal predecessors, (1439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:13:59,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 696 states to 696 states and 1439 transitions. [2021-03-10 23:13:59,762 INFO L78 Accepts]: Start accepts. Automaton has 696 states and 1439 transitions. Word has length 46 [2021-03-10 23:13:59,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:13:59,762 INFO L480 AbstractCegarLoop]: Abstraction has 696 states and 1439 transitions. [2021-03-10 23:13:59,762 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:13:59,762 INFO L276 IsEmpty]: Start isEmpty. Operand 696 states and 1439 transitions. [2021-03-10 23:13:59,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-03-10 23:13:59,764 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:13:59,764 INFO L519 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:13:59,984 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-03-10 23:13:59,985 INFO L428 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:13:59,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:13:59,985 INFO L82 PathProgramCache]: Analyzing trace with hash 768577026, now seen corresponding path program 34 times [2021-03-10 23:13:59,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:13:59,985 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423484506] [2021-03-10 23:13:59,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:13:59,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:14:00,773 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:14:00,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423484506] [2021-03-10 23:14:00,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446559764] [2021-03-10 23:14:00,774 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 23:14:00,805 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:14:00,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:14:00,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 79 conjunts are in the unsatisfiable core [2021-03-10 23:14:00,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:14:00,907 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 11 treesize of output 7 [2021-03-10 23:14:00,908 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:14:00,909 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:14:00,909 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 23:14:00,909 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-03-10 23:14:00,915 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:14:00,915 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:14:00,915 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2021-03-10 23:14:00,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478537405] [2021-03-10 23:14:00,915 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-03-10 23:14:00,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:14:00,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-03-10 23:14:00,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1561, Unknown=0, NotChecked=0, Total=1640 [2021-03-10 23:14:00,916 INFO L87 Difference]: Start difference. First operand 696 states and 1439 transitions. Second operand has 41 states, 41 states have (on average 1.146341463414634) internal successors, (47), 40 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 23:14:03,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:14:03,084 INFO L93 Difference]: Finished difference Result 1425 states and 2801 transitions. [2021-03-10 23:14:03,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-03-10 23:14:03,085 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.146341463414634) internal successors, (47), 40 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 47 [2021-03-10 23:14:03,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:14:03,087 INFO L225 Difference]: With dead ends: 1425 [2021-03-10 23:14:03,087 INFO L226 Difference]: Without dead ends: 889 [2021-03-10 23:14:03,087 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 2339.1ms TimeCoverageRelationStatistics Valid=915, Invalid=5247, Unknown=0, NotChecked=0, Total=6162 [2021-03-10 23:14:03,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 889 states. [2021-03-10 23:14:03,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 889 to 111. [2021-03-10 23:14:03,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.9636363636363636) internal successors, (216), 110 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:14:03,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 216 transitions. [2021-03-10 23:14:03,094 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 216 transitions. Word has length 47 [2021-03-10 23:14:03,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:14:03,095 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 216 transitions. [2021-03-10 23:14:03,095 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 1.146341463414634) internal successors, (47), 40 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 23:14:03,095 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 216 transitions. [2021-03-10 23:14:03,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-03-10 23:14:03,095 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:14:03,095 INFO L519 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:14:03,315 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-03-10 23:14:03,315 INFO L428 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:14:03,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:14:03,315 INFO L82 PathProgramCache]: Analyzing trace with hash -1920845269, now seen corresponding path program 35 times [2021-03-10 23:14:03,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:14:03,316 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653312709] [2021-03-10 23:14:03,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:14:03,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:14:03,545 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 210 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:14:03,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653312709] [2021-03-10 23:14:03,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826840763] [2021-03-10 23:14:03,545 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 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 23:14:03,588 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-03-10 23:14:03,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:14:03,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 40 conjunts are in the unsatisfiable core [2021-03-10 23:14:03,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:14:03,699 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 210 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:14:03,699 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:14:03,699 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 22 [2021-03-10 23:14:03,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891930058] [2021-03-10 23:14:03,700 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 23:14:03,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:14:03,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 23:14:03,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2021-03-10 23:14:03,700 INFO L87 Difference]: Start difference. First operand 111 states and 216 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:14:03,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:14:03,752 INFO L93 Difference]: Finished difference Result 923 states and 1774 transitions. [2021-03-10 23:14:03,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 23:14:03,752 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-03-10 23:14:03,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:14:03,754 INFO L225 Difference]: With dead ends: 923 [2021-03-10 23:14:03,754 INFO L226 Difference]: Without dead ends: 882 [2021-03-10 23:14:03,754 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 195.2ms TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2021-03-10 23:14:03,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 882 states. [2021-03-10 23:14:03,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 882 to 762. [2021-03-10 23:14:03,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 762 states, 761 states have (on average 2.0683311432325886) internal successors, (1574), 761 states have internal predecessors, (1574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:14:03,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 762 states to 762 states and 1574 transitions. [2021-03-10 23:14:03,763 INFO L78 Accepts]: Start accepts. Automaton has 762 states and 1574 transitions. Word has length 48 [2021-03-10 23:14:03,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:14:03,763 INFO L480 AbstractCegarLoop]: Abstraction has 762 states and 1574 transitions. [2021-03-10 23:14:03,763 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:14:03,763 INFO L276 IsEmpty]: Start isEmpty. Operand 762 states and 1574 transitions. [2021-03-10 23:14:03,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-03-10 23:14:03,764 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:14:03,764 INFO L519 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:14:03,974 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-03-10 23:14:03,974 INFO L428 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:14:03,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:14:03,974 INFO L82 PathProgramCache]: Analyzing trace with hash -1960578634, now seen corresponding path program 36 times [2021-03-10 23:14:03,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:14:03,974 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343495661] [2021-03-10 23:14:03,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:14:03,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:14:04,830 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:14:04,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343495661] [2021-03-10 23:14:04,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121817328] [2021-03-10 23:14:04,831 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 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 23:14:04,870 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-03-10 23:14:04,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:14:04,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 85 conjunts are in the unsatisfiable core [2021-03-10 23:14:04,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:14:07,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:07,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:07,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:14:07,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:07,531 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-03-10 23:14:07,533 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:14:07,538 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:14:07,539 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:14:07,539 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:38, output treesize:3 [2021-03-10 23:14:07,545 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 3 proven. 417 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:14:07,545 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:14:07,545 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 75 [2021-03-10 23:14:07,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431546090] [2021-03-10 23:14:07,545 INFO L460 AbstractCegarLoop]: Interpolant automaton has 76 states [2021-03-10 23:14:07,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:14:07,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2021-03-10 23:14:07,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=5494, Unknown=0, NotChecked=0, Total=5700 [2021-03-10 23:14:07,546 INFO L87 Difference]: Start difference. First operand 762 states and 1574 transitions. Second operand has 76 states, 76 states have (on average 1.118421052631579) internal successors, (85), 75 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:14:12,092 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 78 [2021-03-10 23:14:13,942 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 85 [2021-03-10 23:14:36,767 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 83 [2021-03-10 23:14:51,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:14:51,843 INFO L93 Difference]: Finished difference Result 7903 states and 16012 transitions. [2021-03-10 23:14:51,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 274 states. [2021-03-10 23:14:51,844 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 1.118421052631579) internal successors, (85), 75 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-03-10 23:14:51,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:14:51,854 INFO L225 Difference]: With dead ends: 7903 [2021-03-10 23:14:51,854 INFO L226 Difference]: Without dead ends: 3620 [2021-03-10 23:14:51,860 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 359 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 343 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44237 ImplicationChecksByTransitivity, 34409.8ms TimeCoverageRelationStatistics Valid=7420, Invalid=111260, Unknown=0, NotChecked=0, Total=118680 [2021-03-10 23:14:51,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3620 states. [2021-03-10 23:14:51,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3620 to 274. [2021-03-10 23:14:51,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 273 states have (on average 2.0) internal successors, (546), 273 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:14:51,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 546 transitions. [2021-03-10 23:14:51,877 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 546 transitions. Word has length 49 [2021-03-10 23:14:51,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:14:51,878 INFO L480 AbstractCegarLoop]: Abstraction has 274 states and 546 transitions. [2021-03-10 23:14:51,878 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 76 states, 76 states have (on average 1.118421052631579) internal successors, (85), 75 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:14:51,878 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 546 transitions. [2021-03-10 23:14:51,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-03-10 23:14:51,878 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:14:51,878 INFO L519 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:14:52,095 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-03-10 23:14:52,095 INFO L428 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:14:52,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:14:52,095 INFO L82 PathProgramCache]: Analyzing trace with hash -154382910, now seen corresponding path program 37 times [2021-03-10 23:14:52,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:14:52,095 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391480643] [2021-03-10 23:14:52,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:14:52,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:14:53,367 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:14:53,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391480643] [2021-03-10 23:14:53,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795893017] [2021-03-10 23:14:53,368 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 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 23:14:53,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:14:53,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 87 conjunts are in the unsatisfiable core [2021-03-10 23:14:53,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:14:53,538 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 11 treesize of output 7 [2021-03-10 23:14:53,539 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:14:53,540 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:14:53,541 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 23:14:53,541 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-03-10 23:14:53,549 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:14:53,549 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:14:53,549 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2021-03-10 23:14:53,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421983529] [2021-03-10 23:14:53,549 INFO L460 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-03-10 23:14:53,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:14:53,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-03-10 23:14:53,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1893, Unknown=0, NotChecked=0, Total=1980 [2021-03-10 23:14:53,549 INFO L87 Difference]: Start difference. First operand 274 states and 546 transitions. Second operand has 45 states, 45 states have (on average 1.1333333333333333) internal successors, (51), 44 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:14:56,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:14:56,607 INFO L93 Difference]: Finished difference Result 1712 states and 3379 transitions. [2021-03-10 23:14:56,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-03-10 23:14:56,607 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.1333333333333333) internal successors, (51), 44 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-03-10 23:14:56,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:14:56,611 INFO L225 Difference]: With dead ends: 1712 [2021-03-10 23:14:56,611 INFO L226 Difference]: Without dead ends: 1082 [2021-03-10 23:14:56,611 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 861 ImplicationChecksByTransitivity, 3449.9ms TimeCoverageRelationStatistics Valid=1095, Invalid=6387, Unknown=0, NotChecked=0, Total=7482 [2021-03-10 23:14:56,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1082 states. [2021-03-10 23:14:56,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1082 to 121. [2021-03-10 23:14:56,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.9666666666666666) internal successors, (236), 120 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:14:56,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 236 transitions. [2021-03-10 23:14:56,616 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 236 transitions. Word has length 51 [2021-03-10 23:14:56,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:14:56,616 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 236 transitions. [2021-03-10 23:14:56,616 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 45 states, 45 states have (on average 1.1333333333333333) internal successors, (51), 44 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:14:56,616 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 236 transitions. [2021-03-10 23:14:56,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-03-10 23:14:56,617 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:14:56,617 INFO L519 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:14:56,831 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-03-10 23:14:56,831 INFO L428 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:14:56,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:14:56,831 INFO L82 PathProgramCache]: Analyzing trace with hash -467832213, now seen corresponding path program 38 times [2021-03-10 23:14:56,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:14:56,831 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501062583] [2021-03-10 23:14:56,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:14:56,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:14:57,204 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 253 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:14:57,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501062583] [2021-03-10 23:14:57,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145803887] [2021-03-10 23:14:57,205 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 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 23:14:57,248 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:14:57,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:14:57,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 44 conjunts are in the unsatisfiable core [2021-03-10 23:14:57,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:14:57,416 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 253 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:14:57,416 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:14:57,416 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 24 [2021-03-10 23:14:57,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105828116] [2021-03-10 23:14:57,417 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 23:14:57,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:14:57,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 23:14:57,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-03-10 23:14:57,417 INFO L87 Difference]: Start difference. First operand 121 states and 236 transitions. Second operand has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:14:57,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:14:57,494 INFO L93 Difference]: Finished difference Result 1080 states and 2082 transitions. [2021-03-10 23:14:57,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 23:14:57,495 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-03-10 23:14:57,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:14:57,497 INFO L225 Difference]: With dead ends: 1080 [2021-03-10 23:14:57,497 INFO L226 Difference]: Without dead ends: 1035 [2021-03-10 23:14:57,497 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 328.9ms TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-03-10 23:14:57,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1035 states. [2021-03-10 23:14:57,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1035 to 903. [2021-03-10 23:14:57,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 903 states, 902 states have (on average 2.0643015521064303) internal successors, (1862), 902 states have internal predecessors, (1862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:14:57,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 903 states to 903 states and 1862 transitions. [2021-03-10 23:14:57,509 INFO L78 Accepts]: Start accepts. Automaton has 903 states and 1862 transitions. Word has length 52 [2021-03-10 23:14:57,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:14:57,509 INFO L480 AbstractCegarLoop]: Abstraction has 903 states and 1862 transitions. [2021-03-10 23:14:57,509 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:14:57,509 INFO L276 IsEmpty]: Start isEmpty. Operand 903 states and 1862 transitions. [2021-03-10 23:14:57,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-03-10 23:14:57,510 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:14:57,510 INFO L519 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:14:57,724 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-03-10 23:14:57,725 INFO L428 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:14:57,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:14:57,725 INFO L82 PathProgramCache]: Analyzing trace with hash 1135766646, now seen corresponding path program 39 times [2021-03-10 23:14:57,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:14:57,725 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059328228] [2021-03-10 23:14:57,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:14:57,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:14:58,961 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:14:58,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059328228] [2021-03-10 23:14:58,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242559328] [2021-03-10 23:14:58,961 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:14:59,001 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-03-10 23:14:59,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:14:59,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 91 conjunts are in the unsatisfiable core [2021-03-10 23:14:59,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:14:59,147 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 11 treesize of output 7 [2021-03-10 23:14:59,149 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:14:59,151 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:14:59,151 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 23:14:59,152 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-03-10 23:14:59,161 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:14:59,161 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:14:59,161 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2021-03-10 23:14:59,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998751924] [2021-03-10 23:14:59,162 INFO L460 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-03-10 23:14:59,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:14:59,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-03-10 23:14:59,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=2071, Unknown=0, NotChecked=0, Total=2162 [2021-03-10 23:14:59,162 INFO L87 Difference]: Start difference. First operand 903 states and 1862 transitions. Second operand has 47 states, 47 states have (on average 1.127659574468085) internal successors, (53), 46 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:15:02,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:15:02,665 INFO L93 Difference]: Finished difference Result 1845 states and 3635 transitions. [2021-03-10 23:15:02,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-03-10 23:15:02,667 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.127659574468085) internal successors, (53), 46 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-03-10 23:15:02,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:15:02,672 INFO L225 Difference]: With dead ends: 1845 [2021-03-10 23:15:02,672 INFO L226 Difference]: Without dead ends: 1159 [2021-03-10 23:15:02,673 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 946 ImplicationChecksByTransitivity, 3748.7ms TimeCoverageRelationStatistics Valid=1191, Invalid=6999, Unknown=0, NotChecked=0, Total=8190 [2021-03-10 23:15:02,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1159 states. [2021-03-10 23:15:02,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1159 to 126. [2021-03-10 23:15:02,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 1.968) internal successors, (246), 125 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:15:02,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 246 transitions. [2021-03-10 23:15:02,678 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 246 transitions. Word has length 53 [2021-03-10 23:15:02,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:15:02,678 INFO L480 AbstractCegarLoop]: Abstraction has 126 states and 246 transitions. [2021-03-10 23:15:02,678 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.127659574468085) internal successors, (53), 46 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:15:02,678 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 246 transitions. [2021-03-10 23:15:02,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-03-10 23:15:02,679 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:15:02,679 INFO L519 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:15:02,901 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:15:02,902 INFO L428 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:15:02,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:15:02,902 INFO L82 PathProgramCache]: Analyzing trace with hash 872098359, now seen corresponding path program 40 times [2021-03-10 23:15:02,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:15:02,902 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200376987] [2021-03-10 23:15:02,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:15:02,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:15:03,274 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 276 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:15:03,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200376987] [2021-03-10 23:15:03,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151058644] [2021-03-10 23:15:03,275 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 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 23:15:03,309 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:15:03,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:15:03,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 46 conjunts are in the unsatisfiable core [2021-03-10 23:15:03,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:15:03,481 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 276 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:15:03,481 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:15:03,481 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24] total 25 [2021-03-10 23:15:03,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852914841] [2021-03-10 23:15:03,482 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-03-10 23:15:03,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:15:03,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-03-10 23:15:03,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2021-03-10 23:15:03,482 INFO L87 Difference]: Start difference. First operand 126 states and 246 transitions. Second operand has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:15:03,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:15:03,592 INFO L93 Difference]: Finished difference Result 1163 states and 2245 transitions. [2021-03-10 23:15:03,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 23:15:03,593 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-03-10 23:15:03,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:15:03,603 INFO L225 Difference]: With dead ends: 1163 [2021-03-10 23:15:03,603 INFO L226 Difference]: Without dead ends: 1116 [2021-03-10 23:15:03,603 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 325.0ms TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2021-03-10 23:15:03,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1116 states. [2021-03-10 23:15:03,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1116 to 978. [2021-03-10 23:15:03,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 978 states, 977 states have (on average 2.0624360286591608) internal successors, (2015), 977 states have internal predecessors, (2015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:15:03,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 978 states to 978 states and 2015 transitions. [2021-03-10 23:15:03,616 INFO L78 Accepts]: Start accepts. Automaton has 978 states and 2015 transitions. Word has length 54 [2021-03-10 23:15:03,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:15:03,616 INFO L480 AbstractCegarLoop]: Abstraction has 978 states and 2015 transitions. [2021-03-10 23:15:03,616 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:15:03,616 INFO L276 IsEmpty]: Start isEmpty. Operand 978 states and 2015 transitions. [2021-03-10 23:15:03,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-03-10 23:15:03,618 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:15:03,618 INFO L519 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:15:03,831 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:15:03,831 INFO L428 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:15:03,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:15:03,831 INFO L82 PathProgramCache]: Analyzing trace with hash 37342594, now seen corresponding path program 41 times [2021-03-10 23:15:03,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:15:03,832 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894522530] [2021-03-10 23:15:03,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:15:03,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:15:05,208 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:15:05,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894522530] [2021-03-10 23:15:05,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828914235] [2021-03-10 23:15:05,208 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 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 23:15:05,261 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-03-10 23:15:05,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:15:05,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 95 conjunts are in the unsatisfiable core [2021-03-10 23:15:05,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:15:05,432 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 11 treesize of output 7 [2021-03-10 23:15:05,434 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:15:05,435 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:15:05,435 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 23:15:05,436 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-03-10 23:15:05,443 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:15:05,443 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:15:05,443 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2021-03-10 23:15:05,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936104479] [2021-03-10 23:15:05,444 INFO L460 AbstractCegarLoop]: Interpolant automaton has 49 states [2021-03-10 23:15:05,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:15:05,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-03-10 23:15:05,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=2257, Unknown=0, NotChecked=0, Total=2352 [2021-03-10 23:15:05,444 INFO L87 Difference]: Start difference. First operand 978 states and 2015 transitions. Second operand has 49 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 48 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:15:09,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:15:09,332 INFO L93 Difference]: Finished difference Result 1997 states and 3937 transitions. [2021-03-10 23:15:09,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-03-10 23:15:09,333 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 48 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-03-10 23:15:09,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:15:09,335 INFO L225 Difference]: With dead ends: 1997 [2021-03-10 23:15:09,336 INFO L226 Difference]: Without dead ends: 1257 [2021-03-10 23:15:09,336 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1035 ImplicationChecksByTransitivity, 4168.4ms TimeCoverageRelationStatistics Valid=1291, Invalid=7639, Unknown=0, NotChecked=0, Total=8930 [2021-03-10 23:15:09,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1257 states. [2021-03-10 23:15:09,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1257 to 131. [2021-03-10 23:15:09,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 1.9692307692307693) internal successors, (256), 130 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:15:09,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 256 transitions. [2021-03-10 23:15:09,342 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 256 transitions. Word has length 55 [2021-03-10 23:15:09,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:15:09,342 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 256 transitions. [2021-03-10 23:15:09,342 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 49 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 48 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:15:09,342 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 256 transitions. [2021-03-10 23:15:09,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-03-10 23:15:09,343 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:15:09,343 INFO L519 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:15:09,564 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-03-10 23:15:09,565 INFO L428 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:15:09,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:15:09,565 INFO L82 PathProgramCache]: Analyzing trace with hash 1180691115, now seen corresponding path program 42 times [2021-03-10 23:15:09,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:15:09,565 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924593410] [2021-03-10 23:15:09,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:15:09,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:15:10,028 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 300 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:15:10,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924593410] [2021-03-10 23:15:10,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076377682] [2021-03-10 23:15:10,028 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:15:10,083 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-03-10 23:15:10,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:15:10,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 48 conjunts are in the unsatisfiable core [2021-03-10 23:15:10,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:15:10,255 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 300 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:15:10,256 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:15:10,256 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 26 [2021-03-10 23:15:10,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447133835] [2021-03-10 23:15:10,256 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-03-10 23:15:10,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:15:10,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-03-10 23:15:10,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2021-03-10 23:15:10,257 INFO L87 Difference]: Start difference. First operand 131 states and 256 transitions. Second operand has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:15:10,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:15:10,333 INFO L93 Difference]: Finished difference Result 1249 states and 2414 transitions. [2021-03-10 23:15:10,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 23:15:10,334 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-03-10 23:15:10,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:15:10,336 INFO L225 Difference]: With dead ends: 1249 [2021-03-10 23:15:10,336 INFO L226 Difference]: Without dead ends: 1200 [2021-03-10 23:15:10,336 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 412.0ms TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2021-03-10 23:15:10,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1200 states. [2021-03-10 23:15:10,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1200 to 1056. [2021-03-10 23:15:10,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1056 states, 1055 states have (on average 2.060663507109005) internal successors, (2174), 1055 states have internal predecessors, (2174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:15:10,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1056 states to 1056 states and 2174 transitions. [2021-03-10 23:15:10,348 INFO L78 Accepts]: Start accepts. Automaton has 1056 states and 2174 transitions. Word has length 56 [2021-03-10 23:15:10,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:15:10,348 INFO L480 AbstractCegarLoop]: Abstraction has 1056 states and 2174 transitions. [2021-03-10 23:15:10,348 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:15:10,348 INFO L276 IsEmpty]: Start isEmpty. Operand 1056 states and 2174 transitions. [2021-03-10 23:15:10,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-03-10 23:15:10,350 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:15:10,350 INFO L519 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:15:10,559 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:15:10,559 INFO L428 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:15:10,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:15:10,559 INFO L82 PathProgramCache]: Analyzing trace with hash 2139285302, now seen corresponding path program 43 times [2021-03-10 23:15:10,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:15:10,559 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470129528] [2021-03-10 23:15:10,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:15:10,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:15:12,124 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:15:12,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470129528] [2021-03-10 23:15:12,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816246958] [2021-03-10 23:15:12,124 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:15:12,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:15:12,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 99 conjunts are in the unsatisfiable core [2021-03-10 23:15:12,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:15:12,321 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 11 treesize of output 7 [2021-03-10 23:15:12,322 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:15:12,324 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:15:12,325 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 23:15:12,325 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-03-10 23:15:12,334 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:15:12,334 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:15:12,334 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2021-03-10 23:15:12,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642135982] [2021-03-10 23:15:12,335 INFO L460 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-03-10 23:15:12,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:15:12,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-03-10 23:15:12,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=2451, Unknown=0, NotChecked=0, Total=2550 [2021-03-10 23:15:12,335 INFO L87 Difference]: Start difference. First operand 1056 states and 2174 transitions. Second operand has 51 states, 51 states have (on average 1.1176470588235294) internal successors, (57), 50 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:15:16,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:15:16,709 INFO L93 Difference]: Finished difference Result 2155 states and 4251 transitions. [2021-03-10 23:15:16,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-03-10 23:15:16,709 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.1176470588235294) internal successors, (57), 50 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-03-10 23:15:16,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:15:16,711 INFO L225 Difference]: With dead ends: 2155 [2021-03-10 23:15:16,711 INFO L226 Difference]: Without dead ends: 1359 [2021-03-10 23:15:16,711 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1128 ImplicationChecksByTransitivity, 4715.3ms TimeCoverageRelationStatistics Valid=1395, Invalid=8307, Unknown=0, NotChecked=0, Total=9702 [2021-03-10 23:15:16,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1359 states. [2021-03-10 23:15:16,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1359 to 136. [2021-03-10 23:15:16,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 1.9703703703703703) internal successors, (266), 135 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:15:16,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 266 transitions. [2021-03-10 23:15:16,716 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 266 transitions. Word has length 57 [2021-03-10 23:15:16,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:15:16,716 INFO L480 AbstractCegarLoop]: Abstraction has 136 states and 266 transitions. [2021-03-10 23:15:16,716 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 51 states, 51 states have (on average 1.1176470588235294) internal successors, (57), 50 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:15:16,716 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 266 transitions. [2021-03-10 23:15:16,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-03-10 23:15:16,716 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:15:16,717 INFO L519 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:15:16,917 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:15:16,917 INFO L428 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:15:16,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:15:16,917 INFO L82 PathProgramCache]: Analyzing trace with hash 1916405623, now seen corresponding path program 44 times [2021-03-10 23:15:16,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:15:16,918 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810660433] [2021-03-10 23:15:16,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:15:16,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:15:17,336 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 325 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:15:17,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810660433] [2021-03-10 23:15:17,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832441284] [2021-03-10 23:15:17,336 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:15:17,371 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:15:17,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:15:17,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 50 conjunts are in the unsatisfiable core [2021-03-10 23:15:17,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:15:17,574 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 325 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:15:17,574 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:15:17,574 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 27 [2021-03-10 23:15:17,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251409555] [2021-03-10 23:15:17,574 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-03-10 23:15:17,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:15:17,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-03-10 23:15:17,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2021-03-10 23:15:17,575 INFO L87 Difference]: Start difference. First operand 136 states and 266 transitions. Second operand has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:15:17,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:15:17,696 INFO L93 Difference]: Finished difference Result 1338 states and 2589 transitions. [2021-03-10 23:15:17,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 23:15:17,697 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-03-10 23:15:17,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:15:17,700 INFO L225 Difference]: With dead ends: 1338 [2021-03-10 23:15:17,700 INFO L226 Difference]: Without dead ends: 1287 [2021-03-10 23:15:17,700 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 356.2ms TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2021-03-10 23:15:17,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1287 states. [2021-03-10 23:15:17,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1287 to 1137. [2021-03-10 23:15:17,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1137 states, 1136 states have (on average 2.0589788732394365) internal successors, (2339), 1136 states have internal predecessors, (2339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:15:17,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1137 states to 1137 states and 2339 transitions. [2021-03-10 23:15:17,714 INFO L78 Accepts]: Start accepts. Automaton has 1137 states and 2339 transitions. Word has length 58 [2021-03-10 23:15:17,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:15:17,714 INFO L480 AbstractCegarLoop]: Abstraction has 1137 states and 2339 transitions. [2021-03-10 23:15:17,714 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:15:17,714 INFO L276 IsEmpty]: Start isEmpty. Operand 1137 states and 2339 transitions. [2021-03-10 23:15:17,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-03-10 23:15:17,715 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:15:17,716 INFO L519 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:15:17,931 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-03-10 23:15:17,931 INFO L428 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:15:17,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:15:17,931 INFO L82 PathProgramCache]: Analyzing trace with hash -292549310, now seen corresponding path program 45 times [2021-03-10 23:15:17,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:15:17,931 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843893144] [2021-03-10 23:15:17,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:15:17,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:15:19,721 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:15:19,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843893144] [2021-03-10 23:15:19,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479303402] [2021-03-10 23:15:19,721 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 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 23:15:19,767 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-03-10 23:15:19,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:15:19,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 103 conjunts are in the unsatisfiable core [2021-03-10 23:15:19,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:15:19,966 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 11 treesize of output 7 [2021-03-10 23:15:19,968 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:15:19,969 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:15:19,970 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 23:15:19,970 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-03-10 23:15:19,978 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:15:19,978 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:15:19,978 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2021-03-10 23:15:19,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717672870] [2021-03-10 23:15:19,979 INFO L460 AbstractCegarLoop]: Interpolant automaton has 53 states [2021-03-10 23:15:19,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:15:19,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-03-10 23:15:19,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=2653, Unknown=0, NotChecked=0, Total=2756 [2021-03-10 23:15:19,979 INFO L87 Difference]: Start difference. First operand 1137 states and 2339 transitions. Second operand has 53 states, 53 states have (on average 1.1132075471698113) internal successors, (59), 52 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:15:24,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:15:24,796 INFO L93 Difference]: Finished difference Result 2319 states and 4577 transitions. [2021-03-10 23:15:24,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-03-10 23:15:24,796 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.1132075471698113) internal successors, (59), 52 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-03-10 23:15:24,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:15:24,799 INFO L225 Difference]: With dead ends: 2319 [2021-03-10 23:15:24,799 INFO L226 Difference]: Without dead ends: 1465 [2021-03-10 23:15:24,799 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1225 ImplicationChecksByTransitivity, 5240.7ms TimeCoverageRelationStatistics Valid=1503, Invalid=9003, Unknown=0, NotChecked=0, Total=10506 [2021-03-10 23:15:24,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1465 states. [2021-03-10 23:15:24,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1465 to 141. [2021-03-10 23:15:24,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 1.9714285714285715) internal successors, (276), 140 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:15:24,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 276 transitions. [2021-03-10 23:15:24,804 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 276 transitions. Word has length 59 [2021-03-10 23:15:24,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:15:24,804 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 276 transitions. [2021-03-10 23:15:24,804 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 53 states, 53 states have (on average 1.1132075471698113) internal successors, (59), 52 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:15:24,804 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 276 transitions. [2021-03-10 23:15:24,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-03-10 23:15:24,805 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:15:24,805 INFO L519 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:15:25,005 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-03-10 23:15:25,005 INFO L428 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:15:25,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:15:25,006 INFO L82 PathProgramCache]: Analyzing trace with hash -456023317, now seen corresponding path program 46 times [2021-03-10 23:15:25,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:15:25,006 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804663269] [2021-03-10 23:15:25,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:15:25,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:15:25,485 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 351 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:15:25,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804663269] [2021-03-10 23:15:25,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532245706] [2021-03-10 23:15:25,486 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 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 23:15:25,523 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:15:25,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:15:25,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 52 conjunts are in the unsatisfiable core [2021-03-10 23:15:25,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:15:25,728 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 351 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:15:25,728 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:15:25,728 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 28 [2021-03-10 23:15:25,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474118247] [2021-03-10 23:15:25,728 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-03-10 23:15:25,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:15:25,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-03-10 23:15:25,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2021-03-10 23:15:25,729 INFO L87 Difference]: Start difference. First operand 141 states and 276 transitions. Second operand has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 28 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:15:25,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:15:25,817 INFO L93 Difference]: Finished difference Result 1430 states and 2770 transitions. [2021-03-10 23:15:25,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 23:15:25,818 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 28 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-03-10 23:15:25,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:15:25,819 INFO L225 Difference]: With dead ends: 1430 [2021-03-10 23:15:25,819 INFO L226 Difference]: Without dead ends: 1377 [2021-03-10 23:15:25,820 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 430.9ms TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2021-03-10 23:15:25,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1377 states. [2021-03-10 23:15:25,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1377 to 1221. [2021-03-10 23:15:25,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1221 states, 1220 states have (on average 2.057377049180328) internal successors, (2510), 1220 states have internal predecessors, (2510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:15:25,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1221 states to 1221 states and 2510 transitions. [2021-03-10 23:15:25,834 INFO L78 Accepts]: Start accepts. Automaton has 1221 states and 2510 transitions. Word has length 60 [2021-03-10 23:15:25,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:15:25,834 INFO L480 AbstractCegarLoop]: Abstraction has 1221 states and 2510 transitions. [2021-03-10 23:15:25,835 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 28 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:15:25,835 INFO L276 IsEmpty]: Start isEmpty. Operand 1221 states and 2510 transitions. [2021-03-10 23:15:25,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-03-10 23:15:25,836 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:15:25,836 INFO L519 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:15:26,051 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-03-10 23:15:26,051 INFO L428 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:15:26,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:15:26,051 INFO L82 PathProgramCache]: Analyzing trace with hash -1547869706, now seen corresponding path program 47 times [2021-03-10 23:15:26,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:15:26,052 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057954707] [2021-03-10 23:15:26,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:15:26,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:15:28,094 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:15:28,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057954707] [2021-03-10 23:15:28,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188069882] [2021-03-10 23:15:28,095 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:15:28,165 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-03-10 23:15:28,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:15:28,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 75 conjunts are in the unsatisfiable core [2021-03-10 23:15:28,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:15:33,374 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:15:33,375 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 23:15:33,376 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:15:33,382 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:15:33,384 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 23:15:33,384 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:19, output treesize:3 [2021-03-10 23:15:33,393 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 325 proven. 377 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:15:33,393 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:15:33,393 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 106 [2021-03-10 23:15:33,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581210151] [2021-03-10 23:15:33,393 INFO L460 AbstractCegarLoop]: Interpolant automaton has 107 states [2021-03-10 23:15:33,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:15:33,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2021-03-10 23:15:33,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1537, Invalid=9805, Unknown=0, NotChecked=0, Total=11342 [2021-03-10 23:15:33,394 INFO L87 Difference]: Start difference. First operand 1221 states and 2510 transitions. Second operand has 107 states, 107 states have (on average 1.0934579439252337) internal successors, (117), 106 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:15:37,009 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 89 [2021-03-10 23:15:37,238 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 88 [2021-03-10 23:15:37,454 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 97 [2021-03-10 23:15:37,674 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 96 [2021-03-10 23:15:37,899 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 100 [2021-03-10 23:15:38,129 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 104 [2021-03-10 23:15:38,370 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 113 [2021-03-10 23:17:31,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:17:31,753 INFO L93 Difference]: Finished difference Result 15271 states and 30098 transitions. [2021-03-10 23:17:31,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 459 states. [2021-03-10 23:17:31,757 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 1.0934579439252337) internal successors, (117), 106 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-03-10 23:17:31,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:17:31,781 INFO L225 Difference]: With dead ends: 15271 [2021-03-10 23:17:31,782 INFO L226 Difference]: Without dead ends: 11340 [2021-03-10 23:17:31,801 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 544 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 535 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101413 ImplicationChecksByTransitivity, 115904.4ms TimeCoverageRelationStatistics Valid=48990, Invalid=238842, Unknown=0, NotChecked=0, Total=287832 [2021-03-10 23:17:31,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11340 states. [2021-03-10 23:17:31,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11340 to 1252. [2021-03-10 23:17:31,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1252 states, 1251 states have (on average 2.0575539568345325) internal successors, (2574), 1251 states have internal predecessors, (2574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:17:31,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1252 states to 1252 states and 2574 transitions. [2021-03-10 23:17:31,869 INFO L78 Accepts]: Start accepts. Automaton has 1252 states and 2574 transitions. Word has length 61 [2021-03-10 23:17:31,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:17:31,870 INFO L480 AbstractCegarLoop]: Abstraction has 1252 states and 2574 transitions. [2021-03-10 23:17:31,870 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 107 states, 107 states have (on average 1.0934579439252337) internal successors, (117), 106 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:17:31,870 INFO L276 IsEmpty]: Start isEmpty. Operand 1252 states and 2574 transitions. [2021-03-10 23:17:31,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-03-10 23:17:31,872 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:17:31,872 INFO L519 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:17:32,094 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:17:32,095 INFO L428 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:17:32,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:17:32,095 INFO L82 PathProgramCache]: Analyzing trace with hash -2008609534, now seen corresponding path program 48 times [2021-03-10 23:17:32,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:17:32,095 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254994962] [2021-03-10 23:17:32,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:17:32,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:17:37,554 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:17:37,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254994962] [2021-03-10 23:17:37,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356050536] [2021-03-10 23:17:37,554 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 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 23:17:37,604 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-03-10 23:17:37,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:17:37,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 111 conjunts are in the unsatisfiable core [2021-03-10 23:17:37,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:17:38,156 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 11 treesize of output 7 [2021-03-10 23:17:38,160 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:17:38,165 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:17:38,167 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 23:17:38,167 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-03-10 23:17:38,200 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:17:38,200 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:17:38,200 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2021-03-10 23:17:38,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282667466] [2021-03-10 23:17:38,201 INFO L460 AbstractCegarLoop]: Interpolant automaton has 57 states [2021-03-10 23:17:38,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:17:38,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-03-10 23:17:38,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=3081, Unknown=0, NotChecked=0, Total=3192 [2021-03-10 23:17:38,202 INFO L87 Difference]: Start difference. First operand 1252 states and 2574 transitions. Second operand has 57 states, 57 states have (on average 1.105263157894737) internal successors, (63), 56 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:17:44,486 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-03-10 23:17:44,868 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2021-03-10 23:17:45,245 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2021-03-10 23:17:45,624 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2021-03-10 23:17:46,017 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2021-03-10 23:17:46,460 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2021-03-10 23:17:46,874 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2021-03-10 23:17:47,232 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2021-03-10 23:17:47,639 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2021-03-10 23:17:48,146 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2021-03-10 23:17:48,373 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2021-03-10 23:17:48,585 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2021-03-10 23:17:48,794 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2021-03-10 23:17:49,035 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2021-03-10 23:17:49,265 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2021-03-10 23:17:49,497 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2021-03-10 23:17:53,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:17:53,451 INFO L93 Difference]: Finished difference Result 2605 states and 5148 transitions. [2021-03-10 23:17:53,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-03-10 23:17:53,454 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.105263157894737) internal successors, (63), 56 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-03-10 23:17:53,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:17:53,459 INFO L225 Difference]: With dead ends: 2605 [2021-03-10 23:17:53,459 INFO L226 Difference]: Without dead ends: 1687 [2021-03-10 23:17:53,460 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1431 ImplicationChecksByTransitivity, 15367.8ms TimeCoverageRelationStatistics Valid=1731, Invalid=10479, Unknown=0, NotChecked=0, Total=12210 [2021-03-10 23:17:53,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1687 states. [2021-03-10 23:17:53,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1687 to 151. [2021-03-10 23:17:53,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 1.9733333333333334) internal successors, (296), 150 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:17:53,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 296 transitions. [2021-03-10 23:17:53,468 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 296 transitions. Word has length 63 [2021-03-10 23:17:53,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:17:53,468 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 296 transitions. [2021-03-10 23:17:53,468 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 57 states, 57 states have (on average 1.105263157894737) internal successors, (63), 56 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:17:53,468 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 296 transitions. [2021-03-10 23:17:53,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-03-10 23:17:53,468 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:17:53,469 INFO L519 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:17:53,691 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-03-10 23:17:53,691 INFO L428 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:17:53,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:17:53,692 INFO L82 PathProgramCache]: Analyzing trace with hash -2114282709, now seen corresponding path program 49 times [2021-03-10 23:17:53,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:17:53,692 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266414062] [2021-03-10 23:17:53,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:17:53,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:17:55,101 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 406 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:17:55,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266414062] [2021-03-10 23:17:55,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468085251] [2021-03-10 23:17:55,102 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 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:17:55,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:17:55,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 56 conjunts are in the unsatisfiable core [2021-03-10 23:17:55,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:17:55,924 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 406 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:17:55,924 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:17:55,924 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 30 [2021-03-10 23:17:55,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566169107] [2021-03-10 23:17:55,925 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-03-10 23:17:55,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:17:55,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-03-10 23:17:55,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2021-03-10 23:17:55,925 INFO L87 Difference]: Start difference. First operand 151 states and 296 transitions. Second operand has 31 states, 31 states have (on average 2.161290322580645) internal successors, (67), 30 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:17:56,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:17:56,205 INFO L93 Difference]: Finished difference Result 1623 states and 3150 transitions. [2021-03-10 23:17:56,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-10 23:17:56,208 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.161290322580645) internal successors, (67), 30 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-03-10 23:17:56,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:17:56,210 INFO L225 Difference]: With dead ends: 1623 [2021-03-10 23:17:56,210 INFO L226 Difference]: Without dead ends: 1566 [2021-03-10 23:17:56,211 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 1280.5ms TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2021-03-10 23:17:56,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1566 states. [2021-03-10 23:17:56,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1566 to 1398. [2021-03-10 23:17:56,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1398 states, 1397 states have (on average 2.0544022906227632) internal successors, (2870), 1397 states have internal predecessors, (2870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:17:56,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1398 states to 1398 states and 2870 transitions. [2021-03-10 23:17:56,223 INFO L78 Accepts]: Start accepts. Automaton has 1398 states and 2870 transitions. Word has length 64 [2021-03-10 23:17:56,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:17:56,224 INFO L480 AbstractCegarLoop]: Abstraction has 1398 states and 2870 transitions. [2021-03-10 23:17:56,224 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.161290322580645) internal successors, (67), 30 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:17:56,224 INFO L276 IsEmpty]: Start isEmpty. Operand 1398 states and 2870 transitions. [2021-03-10 23:17:56,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-03-10 23:17:56,225 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:17:56,225 INFO L519 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:17:56,447 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:17:56,447 INFO L428 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:17:56,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:17:56,448 INFO L82 PathProgramCache]: Analyzing trace with hash 1468652726, now seen corresponding path program 50 times [2021-03-10 23:17:56,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:17:56,448 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549333346] [2021-03-10 23:17:56,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:17:56,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:18:02,977 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:18:02,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549333346] [2021-03-10 23:18:02,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810596348] [2021-03-10 23:18:02,978 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 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 23:18:03,018 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:18:03,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:18:03,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 115 conjunts are in the unsatisfiable core [2021-03-10 23:18:03,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:18:03,726 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 11 treesize of output 7 [2021-03-10 23:18:03,731 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:18:03,736 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:18:03,739 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 23:18:03,739 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-03-10 23:18:03,778 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:18:03,778 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:18:03,779 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2021-03-10 23:18:03,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338402540] [2021-03-10 23:18:03,779 INFO L460 AbstractCegarLoop]: Interpolant automaton has 59 states [2021-03-10 23:18:03,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:18:03,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-03-10 23:18:03,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=3307, Unknown=0, NotChecked=0, Total=3422 [2021-03-10 23:18:03,780 INFO L87 Difference]: Start difference. First operand 1398 states and 2870 transitions. Second operand has 59 states, 59 states have (on average 1.1016949152542372) internal successors, (65), 58 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:18:09,950 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-03-10 23:18:10,355 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-03-10 23:18:10,765 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2021-03-10 23:18:11,181 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2021-03-10 23:18:11,600 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2021-03-10 23:18:12,028 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2021-03-10 23:18:12,453 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2021-03-10 23:18:12,880 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2021-03-10 23:18:13,311 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2021-03-10 23:18:13,727 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2021-03-10 23:18:14,145 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2021-03-10 23:18:14,719 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2021-03-10 23:18:14,967 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2021-03-10 23:18:15,275 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2021-03-10 23:18:15,533 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2021-03-10 23:18:15,789 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2021-03-10 23:18:16,042 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2021-03-10 23:18:16,286 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2021-03-10 23:18:16,539 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2021-03-10 23:18:16,810 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-03-10 23:18:17,091 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2021-03-10 23:18:21,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:18:21,252 INFO L93 Difference]: Finished difference Result 2847 states and 5627 transitions. [2021-03-10 23:18:21,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-03-10 23:18:21,256 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.1016949152542372) internal successors, (65), 58 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-03-10 23:18:21,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:18:21,259 INFO L225 Difference]: With dead ends: 2847 [2021-03-10 23:18:21,259 INFO L226 Difference]: Without dead ends: 1807 [2021-03-10 23:18:21,260 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1540 ImplicationChecksByTransitivity, 18175.1ms TimeCoverageRelationStatistics Valid=1851, Invalid=11259, Unknown=0, NotChecked=0, Total=13110 [2021-03-10 23:18:21,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1807 states. [2021-03-10 23:18:21,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1807 to 156. [2021-03-10 23:18:21,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 1.9741935483870967) internal successors, (306), 155 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:18:21,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 306 transitions. [2021-03-10 23:18:21,268 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 306 transitions. Word has length 65 [2021-03-10 23:18:21,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:18:21,269 INFO L480 AbstractCegarLoop]: Abstraction has 156 states and 306 transitions. [2021-03-10 23:18:21,269 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 59 states, 59 states have (on average 1.1016949152542372) internal successors, (65), 58 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:18:21,269 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 306 transitions. [2021-03-10 23:18:21,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-03-10 23:18:21,269 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:18:21,270 INFO L519 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:18:21,493 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:18:21,493 INFO L428 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:18:21,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:18:21,493 INFO L82 PathProgramCache]: Analyzing trace with hash -1693335049, now seen corresponding path program 51 times [2021-03-10 23:18:21,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:18:21,493 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54190629] [2021-03-10 23:18:21,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:18:21,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:18:23,094 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 435 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:18:23,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54190629] [2021-03-10 23:18:23,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299186202] [2021-03-10 23:18:23,095 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 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 23:18:23,162 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-03-10 23:18:23,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:18:23,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 58 conjunts are in the unsatisfiable core [2021-03-10 23:18:23,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:18:23,964 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 435 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:18:23,964 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:18:23,964 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30] total 31 [2021-03-10 23:18:23,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118179656] [2021-03-10 23:18:23,965 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-03-10 23:18:23,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:18:23,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-03-10 23:18:23,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2021-03-10 23:18:23,966 INFO L87 Difference]: Start difference. First operand 156 states and 306 transitions. Second operand has 32 states, 32 states have (on average 2.15625) internal successors, (69), 31 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:18:24,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:18:24,293 INFO L93 Difference]: Finished difference Result 1724 states and 3349 transitions. [2021-03-10 23:18:24,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-03-10 23:18:24,297 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.15625) internal successors, (69), 31 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-03-10 23:18:24,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:18:24,299 INFO L225 Difference]: With dead ends: 1724 [2021-03-10 23:18:24,299 INFO L226 Difference]: Without dead ends: 1665 [2021-03-10 23:18:24,299 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 1453.1ms TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2021-03-10 23:18:24,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1665 states. [2021-03-10 23:18:24,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1665 to 1491. [2021-03-10 23:18:24,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1491 states, 1490 states have (on average 2.0530201342281877) internal successors, (3059), 1490 states have internal predecessors, (3059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:18:24,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1491 states to 1491 states and 3059 transitions. [2021-03-10 23:18:24,313 INFO L78 Accepts]: Start accepts. Automaton has 1491 states and 3059 transitions. Word has length 66 [2021-03-10 23:18:24,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:18:24,313 INFO L480 AbstractCegarLoop]: Abstraction has 1491 states and 3059 transitions. [2021-03-10 23:18:24,313 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.15625) internal successors, (69), 31 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:18:24,313 INFO L276 IsEmpty]: Start isEmpty. Operand 1491 states and 3059 transitions. [2021-03-10 23:18:24,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-03-10 23:18:24,315 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:18:24,315 INFO L519 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:18:24,533 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-03-10 23:18:24,534 INFO L428 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:18:24,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:18:24,534 INFO L82 PathProgramCache]: Analyzing trace with hash 1238813890, now seen corresponding path program 52 times [2021-03-10 23:18:24,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:18:24,534 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331770909] [2021-03-10 23:18:24,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:18:24,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:18:32,168 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:18:32,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331770909] [2021-03-10 23:18:32,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919071105] [2021-03-10 23:18:32,168 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 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 23:18:32,213 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:18:32,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:18:32,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 119 conjunts are in the unsatisfiable core [2021-03-10 23:18:32,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:18:33,103 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 11 treesize of output 7 [2021-03-10 23:18:33,108 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:18:33,115 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:18:33,117 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 23:18:33,118 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-03-10 23:18:33,161 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:18:33,162 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:18:33,162 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 60 [2021-03-10 23:18:33,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689819956] [2021-03-10 23:18:33,162 INFO L460 AbstractCegarLoop]: Interpolant automaton has 61 states [2021-03-10 23:18:33,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:18:33,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-03-10 23:18:33,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=3541, Unknown=0, NotChecked=0, Total=3660 [2021-03-10 23:18:33,163 INFO L87 Difference]: Start difference. First operand 1491 states and 3059 transitions. Second operand has 61 states, 61 states have (on average 1.098360655737705) internal successors, (67), 60 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:18:39,172 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-03-10 23:18:39,613 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-03-10 23:18:40,046 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2021-03-10 23:18:40,463 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-03-10 23:18:40,866 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-03-10 23:18:41,278 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2021-03-10 23:18:41,708 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2021-03-10 23:18:42,148 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2021-03-10 23:18:42,625 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2021-03-10 23:18:43,095 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2021-03-10 23:18:43,570 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2021-03-10 23:18:44,053 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2021-03-10 23:18:44,533 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2021-03-10 23:18:45,023 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2021-03-10 23:18:45,512 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2021-03-10 23:18:46,169 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2021-03-10 23:18:46,471 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2021-03-10 23:18:46,767 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2021-03-10 23:18:47,060 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2021-03-10 23:18:47,349 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2021-03-10 23:18:47,660 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2021-03-10 23:18:47,936 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2021-03-10 23:18:48,216 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2021-03-10 23:18:48,498 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2021-03-10 23:18:48,770 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-03-10 23:18:53,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:18:53,902 INFO L93 Difference]: Finished difference Result 3035 states and 6001 transitions. [2021-03-10 23:18:53,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-03-10 23:18:53,905 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.098360655737705) internal successors, (67), 60 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-03-10 23:18:53,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:18:53,907 INFO L225 Difference]: With dead ends: 3035 [2021-03-10 23:18:53,907 INFO L226 Difference]: Without dead ends: 1929 [2021-03-10 23:18:53,907 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 65 SyntacticMatches, 2 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1653 ImplicationChecksByTransitivity, 21384.1ms TimeCoverageRelationStatistics Valid=1975, Invalid=12067, Unknown=0, NotChecked=0, Total=14042 [2021-03-10 23:18:53,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1929 states. [2021-03-10 23:18:53,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1929 to 161. [2021-03-10 23:18:53,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 1.975) internal successors, (316), 160 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:18:53,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 316 transitions. [2021-03-10 23:18:53,913 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 316 transitions. Word has length 67 [2021-03-10 23:18:53,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:18:53,913 INFO L480 AbstractCegarLoop]: Abstraction has 161 states and 316 transitions. [2021-03-10 23:18:53,913 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 61 states, 61 states have (on average 1.098360655737705) internal successors, (67), 60 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:18:53,913 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 316 transitions. [2021-03-10 23:18:53,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-03-10 23:18:53,913 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:18:53,913 INFO L519 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:18:54,113 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:18:54,114 INFO L428 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:18:54,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:18:54,114 INFO L82 PathProgramCache]: Analyzing trace with hash -228404373, now seen corresponding path program 53 times [2021-03-10 23:18:54,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:18:54,114 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337046661] [2021-03-10 23:18:54,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:18:54,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:18:56,086 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 465 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:18:56,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337046661] [2021-03-10 23:18:56,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874386674] [2021-03-10 23:18:56,087 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 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 23:18:56,153 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-03-10 23:18:56,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:18:56,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 60 conjunts are in the unsatisfiable core [2021-03-10 23:18:56,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:18:57,164 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 465 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:18:57,165 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:18:57,165 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31] total 32 [2021-03-10 23:18:57,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568888531] [2021-03-10 23:18:57,165 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-03-10 23:18:57,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:18:57,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-03-10 23:18:57,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 23:18:57,166 INFO L87 Difference]: Start difference. First operand 161 states and 316 transitions. Second operand has 33 states, 33 states have (on average 2.1515151515151514) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:18:57,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:18:57,518 INFO L93 Difference]: Finished difference Result 1828 states and 3554 transitions. [2021-03-10 23:18:57,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-03-10 23:18:57,523 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.1515151515151514) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-03-10 23:18:57,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:18:57,525 INFO L225 Difference]: With dead ends: 1828 [2021-03-10 23:18:57,525 INFO L226 Difference]: Without dead ends: 1767 [2021-03-10 23:18:57,525 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 1780.6ms TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 23:18:57,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1767 states. [2021-03-10 23:18:57,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1767 to 1587. [2021-03-10 23:18:57,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1587 states, 1586 states have (on average 2.051702395964691) internal successors, (3254), 1586 states have internal predecessors, (3254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:18:57,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1587 states to 1587 states and 3254 transitions. [2021-03-10 23:18:57,540 INFO L78 Accepts]: Start accepts. Automaton has 1587 states and 3254 transitions. Word has length 68 [2021-03-10 23:18:57,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:18:57,540 INFO L480 AbstractCegarLoop]: Abstraction has 1587 states and 3254 transitions. [2021-03-10 23:18:57,541 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.1515151515151514) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:18:57,541 INFO L276 IsEmpty]: Start isEmpty. Operand 1587 states and 3254 transitions. [2021-03-10 23:18:57,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-03-10 23:18:57,542 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:18:57,542 INFO L519 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:18:57,742 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-03-10 23:18:57,742 INFO L428 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:18:57,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:18:57,743 INFO L82 PathProgramCache]: Analyzing trace with hash 68179830, now seen corresponding path program 54 times [2021-03-10 23:18:57,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:18:57,743 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499922746] [2021-03-10 23:18:57,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:18:57,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:19:06,123 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:19:06,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499922746] [2021-03-10 23:19:06,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203958925] [2021-03-10 23:19:06,123 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 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 23:19:06,178 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-03-10 23:19:06,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:19:06,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 123 conjunts are in the unsatisfiable core [2021-03-10 23:19:06,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:19:07,061 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 11 treesize of output 7 [2021-03-10 23:19:07,069 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:19:07,075 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:19:07,078 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 23:19:07,079 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-03-10 23:19:07,121 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:19:07,122 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:19:07,122 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 62 [2021-03-10 23:19:07,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049267104] [2021-03-10 23:19:07,122 INFO L460 AbstractCegarLoop]: Interpolant automaton has 63 states [2021-03-10 23:19:07,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:19:07,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-03-10 23:19:07,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2021-03-10 23:19:07,123 INFO L87 Difference]: Start difference. First operand 1587 states and 3254 transitions. Second operand has 63 states, 63 states have (on average 1.0952380952380953) internal successors, (69), 62 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:19:14,142 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-03-10 23:19:14,637 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-03-10 23:19:15,129 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2021-03-10 23:19:15,633 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-03-10 23:19:16,124 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-03-10 23:19:16,639 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2021-03-10 23:19:17,109 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2021-03-10 23:19:17,529 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2021-03-10 23:19:18,010 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2021-03-10 23:19:18,532 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2021-03-10 23:19:19,065 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2021-03-10 23:19:19,609 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2021-03-10 23:19:20,102 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2021-03-10 23:19:20,627 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2021-03-10 23:19:21,183 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2021-03-10 23:19:21,799 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2021-03-10 23:19:22,673 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2021-03-10 23:19:23,024 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2021-03-10 23:19:23,382 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2021-03-10 23:19:23,776 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2021-03-10 23:19:24,134 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2021-03-10 23:19:24,487 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2021-03-10 23:19:24,834 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2021-03-10 23:19:25,168 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2021-03-10 23:19:25,503 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2021-03-10 23:19:25,836 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2021-03-10 23:19:26,166 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-03-10 23:19:26,489 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2021-03-10 23:19:26,812 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2021-03-10 23:19:27,136 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-03-10 23:19:31,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:19:31,847 INFO L93 Difference]: Finished difference Result 3229 states and 6387 transitions. [2021-03-10 23:19:31,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-03-10 23:19:31,853 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.0952380952380953) internal successors, (69), 62 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-03-10 23:19:31,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:19:31,856 INFO L225 Difference]: With dead ends: 3229 [2021-03-10 23:19:31,856 INFO L226 Difference]: Without dead ends: 2055 [2021-03-10 23:19:31,857 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1770 ImplicationChecksByTransitivity, 24696.6ms TimeCoverageRelationStatistics Valid=2103, Invalid=12903, Unknown=0, NotChecked=0, Total=15006 [2021-03-10 23:19:31,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2055 states. [2021-03-10 23:19:31,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2055 to 166. [2021-03-10 23:19:31,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 1.9757575757575758) internal successors, (326), 165 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:19:31,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 326 transitions. [2021-03-10 23:19:31,863 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 326 transitions. Word has length 69 [2021-03-10 23:19:31,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:19:31,864 INFO L480 AbstractCegarLoop]: Abstraction has 166 states and 326 transitions. [2021-03-10 23:19:31,864 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 63 states, 63 states have (on average 1.0952380952380953) internal successors, (69), 62 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:19:31,864 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 326 transitions. [2021-03-10 23:19:31,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-03-10 23:19:31,864 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:19:31,864 INFO L519 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:19:32,079 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-03-10 23:19:32,079 INFO L428 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:19:32,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:19:32,080 INFO L82 PathProgramCache]: Analyzing trace with hash 2136645431, now seen corresponding path program 55 times [2021-03-10 23:19:32,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:19:32,080 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793677197] [2021-03-10 23:19:32,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:19:32,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:19:34,458 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 496 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:19:34,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793677197] [2021-03-10 23:19:34,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873768574] [2021-03-10 23:19:34,458 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 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 23:19:34,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:19:34,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 62 conjunts are in the unsatisfiable core [2021-03-10 23:19:34,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:19:35,587 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 496 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:19:35,587 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:19:35,587 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32] total 33 [2021-03-10 23:19:35,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512694017] [2021-03-10 23:19:35,588 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-03-10 23:19:35,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:19:35,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-03-10 23:19:35,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2021-03-10 23:19:35,588 INFO L87 Difference]: Start difference. First operand 166 states and 326 transitions. Second operand has 34 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 33 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:19:35,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:19:35,955 INFO L93 Difference]: Finished difference Result 1935 states and 3765 transitions. [2021-03-10 23:19:35,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-03-10 23:19:35,959 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 33 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-03-10 23:19:35,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:19:35,965 INFO L225 Difference]: With dead ends: 1935 [2021-03-10 23:19:35,965 INFO L226 Difference]: Without dead ends: 1872 [2021-03-10 23:19:35,965 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 2169.8ms TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2021-03-10 23:19:35,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1872 states. [2021-03-10 23:19:35,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1872 to 1686. [2021-03-10 23:19:35,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1686 states, 1685 states have (on average 2.050445103857567) internal successors, (3455), 1685 states have internal predecessors, (3455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:19:35,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1686 states to 1686 states and 3455 transitions. [2021-03-10 23:19:35,979 INFO L78 Accepts]: Start accepts. Automaton has 1686 states and 3455 transitions. Word has length 70 [2021-03-10 23:19:35,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:19:35,979 INFO L480 AbstractCegarLoop]: Abstraction has 1686 states and 3455 transitions. [2021-03-10 23:19:35,979 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 33 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:19:35,979 INFO L276 IsEmpty]: Start isEmpty. Operand 1686 states and 3455 transitions. [2021-03-10 23:19:35,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-03-10 23:19:35,980 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:19:35,980 INFO L519 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:19:36,181 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:19:36,181 INFO L428 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:19:36,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:19:36,181 INFO L82 PathProgramCache]: Analyzing trace with hash -608744318, now seen corresponding path program 56 times [2021-03-10 23:19:36,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:19:36,181 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042333078] [2021-03-10 23:19:36,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:19:36,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:19:46,996 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:19:46,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042333078] [2021-03-10 23:19:46,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674220898] [2021-03-10 23:19:46,996 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 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 23:19:47,050 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:19:47,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:19:47,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 127 conjunts are in the unsatisfiable core [2021-03-10 23:19:47,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:19:48,060 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 11 treesize of output 7 [2021-03-10 23:19:48,068 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:19:48,075 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:19:48,078 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 23:19:48,078 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-03-10 23:19:48,128 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:19:48,128 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:19:48,128 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 64 [2021-03-10 23:19:48,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318280500] [2021-03-10 23:19:48,128 INFO L460 AbstractCegarLoop]: Interpolant automaton has 65 states [2021-03-10 23:19:48,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:19:48,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-03-10 23:19:48,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=4033, Unknown=0, NotChecked=0, Total=4160 [2021-03-10 23:19:48,129 INFO L87 Difference]: Start difference. First operand 1686 states and 3455 transitions. Second operand has 65 states, 65 states have (on average 1.0923076923076922) internal successors, (71), 64 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:19:53,963 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-03-10 23:19:54,620 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-03-10 23:19:56,225 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-03-10 23:19:56,679 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-03-10 23:19:57,261 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2021-03-10 23:19:57,842 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-03-10 23:19:58,427 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-03-10 23:19:59,017 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2021-03-10 23:19:59,617 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2021-03-10 23:20:00,241 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2021-03-10 23:20:00,876 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2021-03-10 23:20:01,587 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2021-03-10 23:20:02,346 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2021-03-10 23:20:03,064 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2021-03-10 23:20:03,713 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2021-03-10 23:20:04,404 WARN L205 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2021-03-10 23:20:05,122 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2021-03-10 23:20:05,823 WARN L205 SmtUtils]: Spent 262.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2021-03-10 23:20:06,548 WARN L205 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2021-03-10 23:20:07,426 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2021-03-10 23:20:07,824 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2021-03-10 23:20:08,260 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2021-03-10 23:20:08,664 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2021-03-10 23:20:09,094 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2021-03-10 23:20:09,500 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2021-03-10 23:20:09,932 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2021-03-10 23:20:10,327 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2021-03-10 23:20:10,721 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2021-03-10 23:20:11,150 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2021-03-10 23:20:11,590 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2021-03-10 23:20:11,963 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-03-10 23:20:12,384 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2021-03-10 23:20:12,830 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2021-03-10 23:20:13,289 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-03-10 23:20:13,728 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2021-03-10 23:20:14,149 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-03-10 23:20:18,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:20:18,909 INFO L93 Difference]: Finished difference Result 3429 states and 6785 transitions. [2021-03-10 23:20:18,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-03-10 23:20:18,916 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 1.0923076923076922) internal successors, (71), 64 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-03-10 23:20:18,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:20:18,919 INFO L225 Difference]: With dead ends: 3429 [2021-03-10 23:20:18,919 INFO L226 Difference]: Without dead ends: 2185 [2021-03-10 23:20:18,920 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 69 SyntacticMatches, 2 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1891 ImplicationChecksByTransitivity, 30973.8ms TimeCoverageRelationStatistics Valid=2235, Invalid=13767, Unknown=0, NotChecked=0, Total=16002 [2021-03-10 23:20:18,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2185 states. [2021-03-10 23:20:18,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2185 to 171. [2021-03-10 23:20:18,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 1.9764705882352942) internal successors, (336), 170 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:20:18,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 336 transitions. [2021-03-10 23:20:18,927 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 336 transitions. Word has length 71 [2021-03-10 23:20:18,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:20:18,927 INFO L480 AbstractCegarLoop]: Abstraction has 171 states and 336 transitions. [2021-03-10 23:20:18,927 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 65 states, 65 states have (on average 1.0923076923076922) internal successors, (71), 64 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:20:18,927 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 336 transitions. [2021-03-10 23:20:18,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-03-10 23:20:18,927 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:20:18,928 INFO L519 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:20:19,128 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-03-10 23:20:19,128 INFO L428 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:20:19,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:20:19,129 INFO L82 PathProgramCache]: Analyzing trace with hash -1668133973, now seen corresponding path program 57 times [2021-03-10 23:20:19,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:20:19,129 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746954039] [2021-03-10 23:20:19,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:20:19,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:20:22,043 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 528 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:20:22,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746954039] [2021-03-10 23:20:22,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511839489] [2021-03-10 23:20:22,044 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 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:20:22,107 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2021-03-10 23:20:22,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:20:22,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 64 conjunts are in the unsatisfiable core [2021-03-10 23:20:22,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:20:23,450 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 528 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:20:23,450 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:20:23,450 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33] total 34 [2021-03-10 23:20:23,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926559993] [2021-03-10 23:20:23,451 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-03-10 23:20:23,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:20:23,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-03-10 23:20:23,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 23:20:23,451 INFO L87 Difference]: Start difference. First operand 171 states and 336 transitions. Second operand has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 34 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:20:23,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:20:23,935 INFO L93 Difference]: Finished difference Result 2045 states and 3982 transitions. [2021-03-10 23:20:23,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-03-10 23:20:23,941 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 34 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-03-10 23:20:23,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:20:23,944 INFO L225 Difference]: With dead ends: 2045 [2021-03-10 23:20:23,944 INFO L226 Difference]: Without dead ends: 1980 [2021-03-10 23:20:23,944 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 2656.5ms TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 23:20:23,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1980 states. [2021-03-10 23:20:23,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1980 to 1788. [2021-03-10 23:20:23,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1788 states, 1787 states have (on average 2.0492445439283715) internal successors, (3662), 1787 states have internal predecessors, (3662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:20:23,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1788 states to 1788 states and 3662 transitions. [2021-03-10 23:20:23,960 INFO L78 Accepts]: Start accepts. Automaton has 1788 states and 3662 transitions. Word has length 72 [2021-03-10 23:20:23,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:20:23,960 INFO L480 AbstractCegarLoop]: Abstraction has 1788 states and 3662 transitions. [2021-03-10 23:20:23,960 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 34 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:20:23,960 INFO L276 IsEmpty]: Start isEmpty. Operand 1788 states and 3662 transitions. [2021-03-10 23:20:23,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-03-10 23:20:23,962 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:20:23,962 INFO L519 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:20:24,162 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:20:24,162 INFO L428 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:20:24,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:20:24,163 INFO L82 PathProgramCache]: Analyzing trace with hash 1417204278, now seen corresponding path program 58 times [2021-03-10 23:20:24,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:20:24,163 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112333012] [2021-03-10 23:20:24,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:20:24,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:20:36,745 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:20:36,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112333012] [2021-03-10 23:20:36,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329970574] [2021-03-10 23:20:36,746 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 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 23:20:36,791 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:20:36,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:20:36,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 131 conjunts are in the unsatisfiable core [2021-03-10 23:20:36,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:20:37,877 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 11 treesize of output 7 [2021-03-10 23:20:37,884 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:20:37,892 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:20:37,895 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 23:20:37,896 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-03-10 23:20:37,950 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:20:37,950 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:20:37,950 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 66 [2021-03-10 23:20:37,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397626295] [2021-03-10 23:20:37,951 INFO L460 AbstractCegarLoop]: Interpolant automaton has 67 states [2021-03-10 23:20:37,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:20:37,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-03-10 23:20:37,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=4291, Unknown=0, NotChecked=0, Total=4422 [2021-03-10 23:20:37,951 INFO L87 Difference]: Start difference. First operand 1788 states and 3662 transitions. Second operand has 67 states, 67 states have (on average 1.0895522388059702) internal successors, (73), 66 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:20:43,561 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-03-10 23:20:45,351 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-03-10 23:20:45,956 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-03-10 23:20:46,557 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-03-10 23:20:47,178 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-03-10 23:20:47,804 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2021-03-10 23:20:48,423 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-03-10 23:20:49,026 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-03-10 23:20:49,651 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2021-03-10 23:20:50,290 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2021-03-10 23:20:50,913 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2021-03-10 23:20:51,527 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2021-03-10 23:20:52,151 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2021-03-10 23:20:52,746 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2021-03-10 23:20:53,391 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2021-03-10 23:20:54,059 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2021-03-10 23:20:54,717 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2021-03-10 23:20:55,388 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2021-03-10 23:20:56,073 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2021-03-10 23:20:56,758 WARN L205 SmtUtils]: Spent 255.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2021-03-10 23:20:57,471 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2021-03-10 23:20:58,401 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2021-03-10 23:20:58,865 WARN L205 SmtUtils]: Spent 280.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2021-03-10 23:20:59,306 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2021-03-10 23:20:59,728 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2021-03-10 23:21:00,142 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2021-03-10 23:21:00,557 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2021-03-10 23:21:00,968 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2021-03-10 23:21:01,389 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2021-03-10 23:21:01,817 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2021-03-10 23:21:02,282 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2021-03-10 23:21:02,721 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2021-03-10 23:21:03,138 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2021-03-10 23:21:03,544 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-03-10 23:21:03,935 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2021-03-10 23:21:04,333 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2021-03-10 23:21:04,729 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-03-10 23:21:05,128 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2021-03-10 23:21:05,527 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-03-10 23:21:10,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:21:10,321 INFO L93 Difference]: Finished difference Result 3635 states and 7195 transitions. [2021-03-10 23:21:10,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-03-10 23:21:10,326 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 1.0895522388059702) internal successors, (73), 66 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-03-10 23:21:10,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:21:10,330 INFO L225 Difference]: With dead ends: 3635 [2021-03-10 23:21:10,330 INFO L226 Difference]: Without dead ends: 2319 [2021-03-10 23:21:10,331 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 71 SyntacticMatches, 2 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2016 ImplicationChecksByTransitivity, 33684.9ms TimeCoverageRelationStatistics Valid=2371, Invalid=14659, Unknown=0, NotChecked=0, Total=17030 [2021-03-10 23:21:10,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2319 states. [2021-03-10 23:21:10,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2319 to 176. [2021-03-10 23:21:10,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 1.977142857142857) internal successors, (346), 175 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:21:10,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 346 transitions. [2021-03-10 23:21:10,341 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 346 transitions. Word has length 73 [2021-03-10 23:21:10,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:21:10,341 INFO L480 AbstractCegarLoop]: Abstraction has 176 states and 346 transitions. [2021-03-10 23:21:10,341 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 67 states, 67 states have (on average 1.0895522388059702) internal successors, (73), 66 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:21:10,341 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 346 transitions. [2021-03-10 23:21:10,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-03-10 23:21:10,341 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:21:10,341 INFO L519 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:21:10,555 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-03-10 23:21:10,555 INFO L428 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:21:10,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:21:10,555 INFO L82 PathProgramCache]: Analyzing trace with hash 1006730359, now seen corresponding path program 59 times [2021-03-10 23:21:10,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:21:10,556 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863684032] [2021-03-10 23:21:10,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:21:10,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:21:13,549 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 561 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:21:13,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863684032] [2021-03-10 23:21:13,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226372375] [2021-03-10 23:21:13,550 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 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 23:21:13,625 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-03-10 23:21:13,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:21:13,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 66 conjunts are in the unsatisfiable core [2021-03-10 23:21:13,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:21:15,249 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 561 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:21:15,249 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:21:15,249 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34] total 35 [2021-03-10 23:21:15,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025550106] [2021-03-10 23:21:15,250 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-03-10 23:21:15,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:21:15,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-03-10 23:21:15,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2021-03-10 23:21:15,250 INFO L87 Difference]: Start difference. First operand 176 states and 346 transitions. Second operand has 36 states, 36 states have (on average 2.138888888888889) internal successors, (77), 35 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:21:15,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:21:15,741 INFO L93 Difference]: Finished difference Result 2158 states and 4205 transitions. [2021-03-10 23:21:15,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-03-10 23:21:15,746 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.138888888888889) internal successors, (77), 35 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-03-10 23:21:15,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:21:15,749 INFO L225 Difference]: With dead ends: 2158 [2021-03-10 23:21:15,749 INFO L226 Difference]: Without dead ends: 2091 [2021-03-10 23:21:15,749 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 2723.0ms TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2021-03-10 23:21:15,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2091 states. [2021-03-10 23:21:15,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2091 to 1893. [2021-03-10 23:21:15,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1893 states, 1892 states have (on average 2.0480972515856237) internal successors, (3875), 1892 states have internal predecessors, (3875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:21:15,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1893 states to 1893 states and 3875 transitions. [2021-03-10 23:21:15,764 INFO L78 Accepts]: Start accepts. Automaton has 1893 states and 3875 transitions. Word has length 74 [2021-03-10 23:21:15,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:21:15,764 INFO L480 AbstractCegarLoop]: Abstraction has 1893 states and 3875 transitions. [2021-03-10 23:21:15,764 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.138888888888889) internal successors, (77), 35 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:21:15,764 INFO L276 IsEmpty]: Start isEmpty. Operand 1893 states and 3875 transitions. [2021-03-10 23:21:15,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-03-10 23:21:15,765 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:21:15,765 INFO L519 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:21:15,966 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:21:15,966 INFO L428 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:21:15,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:21:15,966 INFO L82 PathProgramCache]: Analyzing trace with hash -1805611966, now seen corresponding path program 60 times [2021-03-10 23:21:15,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:21:15,967 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842187853] [2021-03-10 23:21:15,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:21:15,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:21:29,552 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:21:29,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842187853] [2021-03-10 23:21:29,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547609890] [2021-03-10 23:21:29,553 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 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 23:21:29,616 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2021-03-10 23:21:29,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:21:29,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 135 conjunts are in the unsatisfiable core [2021-03-10 23:21:29,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:21:30,920 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 11 treesize of output 7 [2021-03-10 23:21:30,929 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:21:30,939 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:21:30,943 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 23:21:30,944 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-03-10 23:21:31,015 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:21:31,015 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:21:31,015 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 68 [2021-03-10 23:21:31,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824647081] [2021-03-10 23:21:31,016 INFO L460 AbstractCegarLoop]: Interpolant automaton has 69 states [2021-03-10 23:21:31,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:21:31,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-03-10 23:21:31,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=4557, Unknown=0, NotChecked=0, Total=4692 [2021-03-10 23:21:31,016 INFO L87 Difference]: Start difference. First operand 1893 states and 3875 transitions. Second operand has 69 states, 69 states have (on average 1.0869565217391304) internal successors, (75), 68 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:21:37,911 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-03-10 23:21:38,587 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-03-10 23:21:39,257 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-03-10 23:21:39,947 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-03-10 23:21:40,612 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-03-10 23:21:41,335 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-03-10 23:21:41,991 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2021-03-10 23:21:42,718 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-03-10 23:21:43,444 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-03-10 23:21:44,181 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2021-03-10 23:21:44,926 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2021-03-10 23:21:45,780 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2021-03-10 23:21:46,605 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2021-03-10 23:21:47,457 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2021-03-10 23:21:48,298 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2021-03-10 23:21:49,084 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2021-03-10 23:21:49,879 WARN L205 SmtUtils]: Spent 255.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2021-03-10 23:21:50,707 WARN L205 SmtUtils]: Spent 277.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2021-03-10 23:21:51,542 WARN L205 SmtUtils]: Spent 272.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2021-03-10 23:21:52,265 WARN L205 SmtUtils]: Spent 286.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2021-03-10 23:21:53,065 WARN L205 SmtUtils]: Spent 288.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2021-03-10 23:21:53,875 WARN L205 SmtUtils]: Spent 306.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2021-03-10 23:21:54,728 WARN L205 SmtUtils]: Spent 287.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2021-03-10 23:21:55,747 WARN L205 SmtUtils]: Spent 270.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2021-03-10 23:21:56,213 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2021-03-10 23:21:56,679 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2021-03-10 23:21:57,140 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2021-03-10 23:21:57,593 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2021-03-10 23:21:58,047 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2021-03-10 23:21:58,507 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2021-03-10 23:21:58,964 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2021-03-10 23:21:59,426 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2021-03-10 23:21:59,846 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2021-03-10 23:22:00,327 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2021-03-10 23:22:00,798 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2021-03-10 23:22:01,284 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2021-03-10 23:22:01,809 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-03-10 23:22:02,369 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2021-03-10 23:22:02,893 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2021-03-10 23:22:03,401 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-03-10 23:22:03,923 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2021-03-10 23:22:04,434 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-03-10 23:22:04,902 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2021-03-10 23:22:10,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:22:10,389 INFO L93 Difference]: Finished difference Result 3847 states and 7617 transitions. [2021-03-10 23:22:10,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-03-10 23:22:10,397 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 1.0869565217391304) internal successors, (75), 68 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-03-10 23:22:10,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:22:10,400 INFO L225 Difference]: With dead ends: 3847 [2021-03-10 23:22:10,400 INFO L226 Difference]: Without dead ends: 2457 [2021-03-10 23:22:10,402 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 73 SyntacticMatches, 2 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2145 ImplicationChecksByTransitivity, 39382.0ms TimeCoverageRelationStatistics Valid=2511, Invalid=15579, Unknown=0, NotChecked=0, Total=18090 [2021-03-10 23:22:10,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2457 states. [2021-03-10 23:22:10,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2457 to 181. [2021-03-10 23:22:10,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 1.9777777777777779) internal successors, (356), 180 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:22:10,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 356 transitions. [2021-03-10 23:22:10,422 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 356 transitions. Word has length 75 [2021-03-10 23:22:10,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:22:10,422 INFO L480 AbstractCegarLoop]: Abstraction has 181 states and 356 transitions. [2021-03-10 23:22:10,422 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 69 states, 69 states have (on average 1.0869565217391304) internal successors, (75), 68 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:22:10,423 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 356 transitions. [2021-03-10 23:22:10,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-03-10 23:22:10,423 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:22:10,423 INFO L519 BasicCegarLoop]: trace histogram [34, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:22:10,635 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-03-10 23:22:10,635 INFO L428 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:22:10,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:22:10,635 INFO L82 PathProgramCache]: Analyzing trace with hash -116325397, now seen corresponding path program 61 times [2021-03-10 23:22:10,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:22:10,636 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829176336] [2021-03-10 23:22:10,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:22:10,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:22:14,295 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 595 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:22:14,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829176336] [2021-03-10 23:22:14,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143063325] [2021-03-10 23:22:14,296 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 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:22:14,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:22:14,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 68 conjunts are in the unsatisfiable core [2021-03-10 23:22:14,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:22:16,062 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 595 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:22:16,062 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:22:16,063 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35] total 36 [2021-03-10 23:22:16,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906636874] [2021-03-10 23:22:16,063 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-03-10 23:22:16,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:22:16,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-03-10 23:22:16,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 23:22:16,064 INFO L87 Difference]: Start difference. First operand 181 states and 356 transitions. Second operand has 37 states, 37 states have (on average 2.135135135135135) internal successors, (79), 36 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:22:16,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:22:16,683 INFO L93 Difference]: Finished difference Result 2274 states and 4434 transitions. [2021-03-10 23:22:16,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-03-10 23:22:16,689 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.135135135135135) internal successors, (79), 36 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-03-10 23:22:16,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:22:16,692 INFO L225 Difference]: With dead ends: 2274 [2021-03-10 23:22:16,692 INFO L226 Difference]: Without dead ends: 2205 [2021-03-10 23:22:16,693 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 3363.0ms TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 23:22:16,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2205 states. [2021-03-10 23:22:16,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2205 to 2001. [2021-03-10 23:22:16,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2001 states, 2000 states have (on average 2.047) internal successors, (4094), 2000 states have internal predecessors, (4094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:22:16,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2001 states to 2001 states and 4094 transitions. [2021-03-10 23:22:16,710 INFO L78 Accepts]: Start accepts. Automaton has 2001 states and 4094 transitions. Word has length 76 [2021-03-10 23:22:16,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:22:16,710 INFO L480 AbstractCegarLoop]: Abstraction has 2001 states and 4094 transitions. [2021-03-10 23:22:16,710 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.135135135135135) internal successors, (79), 36 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:22:16,710 INFO L276 IsEmpty]: Start isEmpty. Operand 2001 states and 4094 transitions. [2021-03-10 23:22:16,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-03-10 23:22:16,712 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:22:16,712 INFO L519 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:22:16,913 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:22:16,913 INFO L428 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:22:16,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:22:16,914 INFO L82 PathProgramCache]: Analyzing trace with hash -1242870538, now seen corresponding path program 62 times [2021-03-10 23:22:16,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:22:16,914 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759916647] [2021-03-10 23:22:16,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:22:16,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:22:34,002 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:22:34,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759916647] [2021-03-10 23:22:34,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099420230] [2021-03-10 23:22:34,003 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 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 23:22:34,058 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:22:34,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:22:34,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 139 conjunts are in the unsatisfiable core [2021-03-10 23:22:34,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:22:35,834 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 11 treesize of output 7 [2021-03-10 23:22:35,843 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:22:35,854 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:22:35,859 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 23:22:35,860 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-03-10 23:22:35,936 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:22:35,936 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:22:35,936 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 70 [2021-03-10 23:22:35,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947330847] [2021-03-10 23:22:35,937 INFO L460 AbstractCegarLoop]: Interpolant automaton has 71 states [2021-03-10 23:22:35,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:22:35,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-03-10 23:22:35,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=4831, Unknown=0, NotChecked=0, Total=4970 [2021-03-10 23:22:35,938 INFO L87 Difference]: Start difference. First operand 2001 states and 4094 transitions. Second operand has 71 states, 71 states have (on average 1.0845070422535212) internal successors, (77), 70 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:22:41,593 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-03-10 23:22:43,203 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-03-10 23:22:44,010 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-03-10 23:22:44,801 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-03-10 23:22:45,628 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-03-10 23:22:46,504 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-03-10 23:22:47,340 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-03-10 23:22:48,196 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-03-10 23:22:49,095 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2021-03-10 23:22:49,983 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-03-10 23:22:50,897 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-03-10 23:22:51,794 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2021-03-10 23:22:52,795 WARN L205 SmtUtils]: Spent 256.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2021-03-10 23:22:53,846 WARN L205 SmtUtils]: Spent 279.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2021-03-10 23:22:54,758 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2021-03-10 23:22:55,676 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2021-03-10 23:22:56,594 WARN L205 SmtUtils]: Spent 262.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2021-03-10 23:22:57,509 WARN L205 SmtUtils]: Spent 274.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2021-03-10 23:22:58,364 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2021-03-10 23:22:59,280 WARN L205 SmtUtils]: Spent 303.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2021-03-10 23:23:00,245 WARN L205 SmtUtils]: Spent 331.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2021-03-10 23:23:01,226 WARN L205 SmtUtils]: Spent 343.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2021-03-10 23:23:02,213 WARN L205 SmtUtils]: Spent 352.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2021-03-10 23:23:03,172 WARN L205 SmtUtils]: Spent 340.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2021-03-10 23:23:04,117 WARN L205 SmtUtils]: Spent 353.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2021-03-10 23:23:05,123 WARN L205 SmtUtils]: Spent 335.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2021-03-10 23:23:06,405 WARN L205 SmtUtils]: Spent 322.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2021-03-10 23:23:06,970 WARN L205 SmtUtils]: Spent 322.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2021-03-10 23:23:07,523 WARN L205 SmtUtils]: Spent 301.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2021-03-10 23:23:08,085 WARN L205 SmtUtils]: Spent 297.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2021-03-10 23:23:08,641 WARN L205 SmtUtils]: Spent 283.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2021-03-10 23:23:09,199 WARN L205 SmtUtils]: Spent 279.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2021-03-10 23:23:09,756 WARN L205 SmtUtils]: Spent 288.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2021-03-10 23:23:10,382 WARN L205 SmtUtils]: Spent 285.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2021-03-10 23:23:10,939 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2021-03-10 23:23:11,482 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2021-03-10 23:23:12,066 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2021-03-10 23:23:12,622 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2021-03-10 23:23:13,189 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2021-03-10 23:23:13,733 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2021-03-10 23:23:14,279 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-03-10 23:23:14,818 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2021-03-10 23:23:15,377 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2021-03-10 23:23:15,925 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-03-10 23:23:16,489 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2021-03-10 23:23:17,044 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-03-10 23:23:17,581 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2021-03-10 23:23:18,040 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-03-10 23:23:18,579 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-03-10 23:23:19,124 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-03-10 23:23:24,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:23:24,323 INFO L93 Difference]: Finished difference Result 4065 states and 8051 transitions. [2021-03-10 23:23:24,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-03-10 23:23:24,332 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 1.0845070422535212) internal successors, (77), 70 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-03-10 23:23:24,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:23:24,336 INFO L225 Difference]: With dead ends: 4065 [2021-03-10 23:23:24,336 INFO L226 Difference]: Without dead ends: 2599 [2021-03-10 23:23:24,338 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 75 SyntacticMatches, 2 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2278 ImplicationChecksByTransitivity, 48449.1ms TimeCoverageRelationStatistics Valid=2655, Invalid=16527, Unknown=0, NotChecked=0, Total=19182 [2021-03-10 23:23:24,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2599 states. [2021-03-10 23:23:24,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2599 to 186. [2021-03-10 23:23:24,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 1.9783783783783784) internal successors, (366), 185 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:23:24,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 366 transitions. [2021-03-10 23:23:24,346 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 366 transitions. Word has length 77 [2021-03-10 23:23:24,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:23:24,346 INFO L480 AbstractCegarLoop]: Abstraction has 186 states and 366 transitions. [2021-03-10 23:23:24,346 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 71 states, 71 states have (on average 1.0845070422535212) internal successors, (77), 70 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:23:24,346 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 366 transitions. [2021-03-10 23:23:24,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-03-10 23:23:24,347 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:23:24,347 INFO L519 BasicCegarLoop]: trace histogram [35, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:23:24,563 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-03-10 23:23:24,563 INFO L428 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:23:24,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:23:24,564 INFO L82 PathProgramCache]: Analyzing trace with hash 148789687, now seen corresponding path program 63 times [2021-03-10 23:23:24,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:23:24,564 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952684714] [2021-03-10 23:23:24,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:23:24,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:23:28,954 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 630 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:23:28,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952684714] [2021-03-10 23:23:28,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684178975] [2021-03-10 23:23:28,955 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 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:23:29,023 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2021-03-10 23:23:29,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:23:29,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 70 conjunts are in the unsatisfiable core [2021-03-10 23:23:29,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:23:31,026 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 630 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:23:31,027 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:23:31,027 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36] total 37 [2021-03-10 23:23:31,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402929798] [2021-03-10 23:23:31,028 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-03-10 23:23:31,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:23:31,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-03-10 23:23:31,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2021-03-10 23:23:31,029 INFO L87 Difference]: Start difference. First operand 186 states and 366 transitions. Second operand has 38 states, 38 states have (on average 2.1315789473684212) internal successors, (81), 37 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:23:31,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:23:31,681 INFO L93 Difference]: Finished difference Result 2393 states and 4669 transitions. [2021-03-10 23:23:31,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-03-10 23:23:31,687 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.1315789473684212) internal successors, (81), 37 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2021-03-10 23:23:31,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:23:31,690 INFO L225 Difference]: With dead ends: 2393 [2021-03-10 23:23:31,690 INFO L226 Difference]: Without dead ends: 2322 [2021-03-10 23:23:31,690 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 4019.9ms TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2021-03-10 23:23:31,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2322 states. [2021-03-10 23:23:31,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2322 to 2112. [2021-03-10 23:23:31,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2112 states, 2111 states have (on average 2.045949786830886) internal successors, (4319), 2111 states have internal predecessors, (4319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:23:31,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2112 states to 2112 states and 4319 transitions. [2021-03-10 23:23:31,714 INFO L78 Accepts]: Start accepts. Automaton has 2112 states and 4319 transitions. Word has length 78 [2021-03-10 23:23:31,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:23:31,714 INFO L480 AbstractCegarLoop]: Abstraction has 2112 states and 4319 transitions. [2021-03-10 23:23:31,714 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.1315789473684212) internal successors, (81), 37 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:23:31,714 INFO L276 IsEmpty]: Start isEmpty. Operand 2112 states and 4319 transitions. [2021-03-10 23:23:31,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-03-10 23:23:31,716 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:23:31,717 INFO L519 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:23:31,930 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:23:31,930 INFO L428 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:23:31,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:23:31,931 INFO L82 PathProgramCache]: Analyzing trace with hash -129332222, now seen corresponding path program 64 times [2021-03-10 23:23:31,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:23:31,931 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244260056] [2021-03-10 23:23:31,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:23:31,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:23:53,125 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:23:53,125 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244260056] [2021-03-10 23:23:53,125 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066675916] [2021-03-10 23:23:53,125 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 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:23:53,181 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:23:53,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:23:53,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 143 conjunts are in the unsatisfiable core [2021-03-10 23:23:53,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:23:55,238 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 11 treesize of output 7 [2021-03-10 23:23:55,249 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:23:55,259 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:23:55,265 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 23:23:55,265 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-03-10 23:23:55,351 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:23:55,351 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:23:55,351 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 72 [2021-03-10 23:23:55,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938556364] [2021-03-10 23:23:55,352 INFO L460 AbstractCegarLoop]: Interpolant automaton has 73 states [2021-03-10 23:23:55,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:23:55,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2021-03-10 23:23:55,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=5113, Unknown=0, NotChecked=0, Total=5256 [2021-03-10 23:23:55,353 INFO L87 Difference]: Start difference. First operand 2112 states and 4319 transitions. Second operand has 73 states, 73 states have (on average 1.082191780821918) internal successors, (79), 72 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:24:01,143 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-03-10 23:24:02,111 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-03-10 23:24:03,086 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-03-10 23:24:04,004 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-03-10 23:24:04,938 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-03-10 23:24:05,867 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-03-10 23:24:06,804 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-03-10 23:24:07,776 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-03-10 23:24:08,719 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-03-10 23:24:09,752 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-03-10 23:24:10,788 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2021-03-10 23:24:11,919 WARN L205 SmtUtils]: Spent 255.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-03-10 23:24:13,104 WARN L205 SmtUtils]: Spent 266.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-03-10 23:24:14,314 WARN L205 SmtUtils]: Spent 261.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2021-03-10 23:24:15,258 WARN L205 SmtUtils]: Spent 256.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2021-03-10 23:24:16,339 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2021-03-10 23:24:17,400 WARN L205 SmtUtils]: Spent 280.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2021-03-10 23:24:18,464 WARN L205 SmtUtils]: Spent 285.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2021-03-10 23:24:19,484 WARN L205 SmtUtils]: Spent 277.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2021-03-10 23:24:20,591 WARN L205 SmtUtils]: Spent 323.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2021-03-10 23:24:21,697 WARN L205 SmtUtils]: Spent 330.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2021-03-10 23:24:22,833 WARN L205 SmtUtils]: Spent 354.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2021-03-10 23:24:23,946 WARN L205 SmtUtils]: Spent 342.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2021-03-10 23:24:25,050 WARN L205 SmtUtils]: Spent 367.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2021-03-10 23:24:26,118 WARN L205 SmtUtils]: Spent 361.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2021-03-10 23:24:27,183 WARN L205 SmtUtils]: Spent 369.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2021-03-10 23:24:28,295 WARN L205 SmtUtils]: Spent 399.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2021-03-10 23:24:29,391 WARN L205 SmtUtils]: Spent 402.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2021-03-10 23:24:30,677 WARN L205 SmtUtils]: Spent 425.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2021-03-10 23:24:32,415 WARN L205 SmtUtils]: Spent 455.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2021-03-10 23:24:33,100 WARN L205 SmtUtils]: Spent 379.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2021-03-10 23:24:33,741 WARN L205 SmtUtils]: Spent 345.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2021-03-10 23:24:34,369 WARN L205 SmtUtils]: Spent 327.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2021-03-10 23:24:34,995 WARN L205 SmtUtils]: Spent 326.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2021-03-10 23:24:35,644 WARN L205 SmtUtils]: Spent 333.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2021-03-10 23:24:36,269 WARN L205 SmtUtils]: Spent 303.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2021-03-10 23:24:36,844 WARN L205 SmtUtils]: Spent 256.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2021-03-10 23:24:37,390 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2021-03-10 23:24:38,006 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2021-03-10 23:24:38,621 WARN L205 SmtUtils]: Spent 255.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2021-03-10 23:24:39,245 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2021-03-10 23:24:39,868 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2021-03-10 23:24:40,498 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2021-03-10 23:24:41,112 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2021-03-10 23:24:41,737 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-03-10 23:24:42,402 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2021-03-10 23:24:43,096 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2021-03-10 23:24:43,773 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-03-10 23:24:44,470 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2021-03-10 23:24:45,149 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-03-10 23:24:45,757 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2021-03-10 23:24:46,377 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-03-10 23:24:47,014 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-03-10 23:24:47,637 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-03-10 23:24:48,234 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-03-10 23:24:52,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:24:52,934 INFO L93 Difference]: Finished difference Result 4289 states and 8497 transitions. [2021-03-10 23:24:52,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-03-10 23:24:52,942 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 1.082191780821918) internal successors, (79), 72 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-03-10 23:24:52,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:24:52,946 INFO L225 Difference]: With dead ends: 4289 [2021-03-10 23:24:52,946 INFO L226 Difference]: Without dead ends: 2745 [2021-03-10 23:24:52,948 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 77 SyntacticMatches, 2 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2415 ImplicationChecksByTransitivity, 57982.7ms TimeCoverageRelationStatistics Valid=2803, Invalid=17503, Unknown=0, NotChecked=0, Total=20306 [2021-03-10 23:24:52,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2745 states. [2021-03-10 23:24:52,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2745 to 191. [2021-03-10 23:24:52,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 1.9789473684210526) internal successors, (376), 190 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:24:52,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 376 transitions. [2021-03-10 23:24:52,956 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 376 transitions. Word has length 79 [2021-03-10 23:24:52,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:24:52,956 INFO L480 AbstractCegarLoop]: Abstraction has 191 states and 376 transitions. [2021-03-10 23:24:52,956 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 73 states, 73 states have (on average 1.082191780821918) internal successors, (79), 72 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:24:52,956 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 376 transitions. [2021-03-10 23:24:52,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-03-10 23:24:52,956 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:24:52,956 INFO L519 BasicCegarLoop]: trace histogram [36, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:24:53,157 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-03-10 23:24:53,157 INFO L428 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:24:53,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:24:53,157 INFO L82 PathProgramCache]: Analyzing trace with hash 308739115, now seen corresponding path program 65 times [2021-03-10 23:24:53,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:24:53,158 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620333833] [2021-03-10 23:24:53,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:24:53,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:24:58,057 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 666 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:24:58,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620333833] [2021-03-10 23:24:58,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291124579] [2021-03-10 23:24:58,058 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 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 23:24:58,141 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2021-03-10 23:24:58,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:24:58,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 72 conjunts are in the unsatisfiable core [2021-03-10 23:24:58,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:25:00,758 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 666 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:25:00,758 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:25:00,758 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37] total 38 [2021-03-10 23:25:00,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093491146] [2021-03-10 23:25:00,759 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-03-10 23:25:00,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:25:00,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-03-10 23:25:00,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2021-03-10 23:25:00,759 INFO L87 Difference]: Start difference. First operand 191 states and 376 transitions. Second operand has 39 states, 39 states have (on average 2.128205128205128) internal successors, (83), 38 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:25:01,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:25:01,709 INFO L93 Difference]: Finished difference Result 2515 states and 4910 transitions. [2021-03-10 23:25:01,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-03-10 23:25:01,719 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.128205128205128) internal successors, (83), 38 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-03-10 23:25:01,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:25:01,723 INFO L225 Difference]: With dead ends: 2515 [2021-03-10 23:25:01,723 INFO L226 Difference]: Without dead ends: 2442 [2021-03-10 23:25:01,723 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 4484.7ms TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2021-03-10 23:25:01,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2442 states. [2021-03-10 23:25:01,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2442 to 2226. [2021-03-10 23:25:01,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2226 states, 2225 states have (on average 2.044943820224719) internal successors, (4550), 2225 states have internal predecessors, (4550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:25:01,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2226 states to 2226 states and 4550 transitions. [2021-03-10 23:25:01,754 INFO L78 Accepts]: Start accepts. Automaton has 2226 states and 4550 transitions. Word has length 80 [2021-03-10 23:25:01,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:25:01,754 INFO L480 AbstractCegarLoop]: Abstraction has 2226 states and 4550 transitions. [2021-03-10 23:25:01,754 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.128205128205128) internal successors, (83), 38 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:25:01,754 INFO L276 IsEmpty]: Start isEmpty. Operand 2226 states and 4550 transitions. [2021-03-10 23:25:01,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-03-10 23:25:01,757 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:25:01,757 INFO L519 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:25:01,975 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-03-10 23:25:01,975 INFO L428 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:25:01,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:25:01,976 INFO L82 PathProgramCache]: Analyzing trace with hash -678443082, now seen corresponding path program 66 times [2021-03-10 23:25:01,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:25:01,976 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598895748] [2021-03-10 23:25:01,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:25:01,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:25:25,114 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:25:25,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598895748] [2021-03-10 23:25:25,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125485273] [2021-03-10 23:25:25,115 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 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 23:25:25,184 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-03-10 23:25:25,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:25:25,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 147 conjunts are in the unsatisfiable core [2021-03-10 23:25:25,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:25:26,781 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 11 treesize of output 7 [2021-03-10 23:25:26,789 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:25:26,799 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:25:26,803 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:25:26,803 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-03-10 23:25:26,874 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:25:26,874 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:25:26,874 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 74 [2021-03-10 23:25:26,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925072004] [2021-03-10 23:25:26,875 INFO L460 AbstractCegarLoop]: Interpolant automaton has 75 states [2021-03-10 23:25:26,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:25:26,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-03-10 23:25:26,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=5403, Unknown=0, NotChecked=0, Total=5550 [2021-03-10 23:25:26,875 INFO L87 Difference]: Start difference. First operand 2226 states and 4550 transitions. Second operand has 75 states, 75 states have (on average 1.08) internal successors, (81), 74 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:25:33,395 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-03-10 23:25:34,170 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-03-10 23:25:34,953 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-03-10 23:25:35,723 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-03-10 23:25:36,502 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-03-10 23:25:37,286 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-03-10 23:25:38,081 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-03-10 23:25:38,803 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-03-10 23:25:39,651 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2021-03-10 23:25:40,467 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-03-10 23:25:41,319 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-03-10 23:25:42,152 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2021-03-10 23:25:42,996 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2021-03-10 23:25:43,831 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2021-03-10 23:25:44,670 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2021-03-10 23:25:45,555 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2021-03-10 23:25:46,443 WARN L205 SmtUtils]: Spent 267.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2021-03-10 23:25:47,377 WARN L205 SmtUtils]: Spent 271.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2021-03-10 23:25:48,349 WARN L205 SmtUtils]: Spent 287.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2021-03-10 23:25:49,260 WARN L205 SmtUtils]: Spent 269.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2021-03-10 23:25:50,158 WARN L205 SmtUtils]: Spent 293.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2021-03-10 23:25:51,062 WARN L205 SmtUtils]: Spent 293.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2021-03-10 23:25:51,998 WARN L205 SmtUtils]: Spent 296.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2021-03-10 23:25:52,942 WARN L205 SmtUtils]: Spent 327.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2021-03-10 23:25:53,824 WARN L205 SmtUtils]: Spent 288.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2021-03-10 23:25:54,697 WARN L205 SmtUtils]: Spent 335.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2021-03-10 23:25:55,638 WARN L205 SmtUtils]: Spent 355.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2021-03-10 23:25:56,623 WARN L205 SmtUtils]: Spent 335.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2021-03-10 23:25:57,897 WARN L205 SmtUtils]: Spent 323.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2021-03-10 23:25:58,454 WARN L205 SmtUtils]: Spent 314.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2021-03-10 23:25:59,017 WARN L205 SmtUtils]: Spent 308.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2021-03-10 23:25:59,566 WARN L205 SmtUtils]: Spent 294.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2021-03-10 23:26:00,154 WARN L205 SmtUtils]: Spent 298.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2021-03-10 23:26:00,730 WARN L205 SmtUtils]: Spent 290.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2021-03-10 23:26:01,294 WARN L205 SmtUtils]: Spent 280.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2021-03-10 23:26:01,896 WARN L205 SmtUtils]: Spent 291.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2021-03-10 23:26:02,533 WARN L205 SmtUtils]: Spent 287.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2021-03-10 23:26:03,146 WARN L205 SmtUtils]: Spent 270.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2021-03-10 23:26:03,735 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2021-03-10 23:26:04,288 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2021-03-10 23:26:04,834 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2021-03-10 23:26:05,372 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2021-03-10 23:26:05,827 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2021-03-10 23:26:06,254 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2021-03-10 23:26:06,758 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-03-10 23:26:07,279 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2021-03-10 23:26:07,806 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2021-03-10 23:26:08,325 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-03-10 23:26:08,837 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2021-03-10 23:26:09,358 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-03-10 23:26:09,878 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2021-03-10 23:26:10,432 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-03-10 23:26:10,967 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-03-10 23:26:15,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:26:15,968 INFO L93 Difference]: Finished difference Result 4519 states and 8955 transitions. [2021-03-10 23:26:15,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-03-10 23:26:15,975 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 1.08) internal successors, (81), 74 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-03-10 23:26:15,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:26:15,978 INFO L225 Difference]: With dead ends: 4519 [2021-03-10 23:26:15,978 INFO L226 Difference]: Without dead ends: 2895 [2021-03-10 23:26:15,979 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 79 SyntacticMatches, 2 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2556 ImplicationChecksByTransitivity, 54858.5ms TimeCoverageRelationStatistics Valid=2955, Invalid=18507, Unknown=0, NotChecked=0, Total=21462 [2021-03-10 23:26:15,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2895 states. [2021-03-10 23:26:15,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2895 to 196. [2021-03-10 23:26:15,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 1.9794871794871796) internal successors, (386), 195 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:26:15,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 386 transitions. [2021-03-10 23:26:15,986 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 386 transitions. Word has length 81 [2021-03-10 23:26:15,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:26:15,986 INFO L480 AbstractCegarLoop]: Abstraction has 196 states and 386 transitions. [2021-03-10 23:26:15,986 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 75 states, 75 states have (on average 1.08) internal successors, (81), 74 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:26:15,987 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 386 transitions. [2021-03-10 23:26:15,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-03-10 23:26:15,987 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:26:15,987 INFO L519 BasicCegarLoop]: trace histogram [37, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:26:16,187 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-03-10 23:26:16,188 INFO L428 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:26:16,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:26:16,188 INFO L82 PathProgramCache]: Analyzing trace with hash 466171639, now seen corresponding path program 67 times [2021-03-10 23:26:16,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:26:16,188 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043878063] [2021-03-10 23:26:16,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:26:16,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:26:20,532 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 703 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:26:20,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043878063] [2021-03-10 23:26:20,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660561067] [2021-03-10 23:26:20,533 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 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:26:20,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:26:20,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 74 conjunts are in the unsatisfiable core [2021-03-10 23:26:20,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:26:22,783 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 703 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:26:22,783 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:26:22,784 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38] total 39 [2021-03-10 23:26:22,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432603376] [2021-03-10 23:26:22,784 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-03-10 23:26:22,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:26:22,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-03-10 23:26:22,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2021-03-10 23:26:22,785 INFO L87 Difference]: Start difference. First operand 196 states and 386 transitions. Second operand has 40 states, 40 states have (on average 2.125) internal successors, (85), 39 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:26:23,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:26:23,508 INFO L93 Difference]: Finished difference Result 2640 states and 5157 transitions. [2021-03-10 23:26:23,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-03-10 23:26:23,515 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.125) internal successors, (85), 39 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-03-10 23:26:23,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:26:23,517 INFO L225 Difference]: With dead ends: 2640 [2021-03-10 23:26:23,517 INFO L226 Difference]: Without dead ends: 2565 [2021-03-10 23:26:23,517 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 4001.3ms TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2021-03-10 23:26:23,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2565 states. [2021-03-10 23:26:23,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2565 to 2343. [2021-03-10 23:26:23,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2343 states, 2342 states have (on average 2.04397950469684) internal successors, (4787), 2342 states have internal predecessors, (4787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:26:23,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2343 states to 2343 states and 4787 transitions. [2021-03-10 23:26:23,535 INFO L78 Accepts]: Start accepts. Automaton has 2343 states and 4787 transitions. Word has length 82 [2021-03-10 23:26:23,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:26:23,535 INFO L480 AbstractCegarLoop]: Abstraction has 2343 states and 4787 transitions. [2021-03-10 23:26:23,535 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 2.125) internal successors, (85), 39 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:26:23,535 INFO L276 IsEmpty]: Start isEmpty. Operand 2343 states and 4787 transitions. [2021-03-10 23:26:23,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-03-10 23:26:23,537 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:26:23,537 INFO L519 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:26:23,737 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:26:23,737 INFO L428 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:26:23,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:26:23,737 INFO L82 PathProgramCache]: Analyzing trace with hash 971852738, now seen corresponding path program 68 times [2021-03-10 23:26:23,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:26:23,738 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583001020] [2021-03-10 23:26:23,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:26:23,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:26:41,723 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:26:41,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583001020] [2021-03-10 23:26:41,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544404367] [2021-03-10 23:26:41,724 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 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 23:26:41,780 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:26:41,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:26:41,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 151 conjunts are in the unsatisfiable core [2021-03-10 23:26:41,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:26:43,351 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 11 treesize of output 7 [2021-03-10 23:26:43,359 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:26:43,367 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:26:43,372 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 23:26:43,372 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-03-10 23:26:43,440 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:26:43,440 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:26:43,440 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 76 [2021-03-10 23:26:43,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194883979] [2021-03-10 23:26:43,440 INFO L460 AbstractCegarLoop]: Interpolant automaton has 77 states [2021-03-10 23:26:43,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:26:43,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2021-03-10 23:26:43,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=5701, Unknown=0, NotChecked=0, Total=5852 [2021-03-10 23:26:43,441 INFO L87 Difference]: Start difference. First operand 2343 states and 4787 transitions. Second operand has 77 states, 77 states have (on average 1.077922077922078) internal successors, (83), 76 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:26:50,281 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-03-10 23:26:51,081 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-03-10 23:26:51,864 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-03-10 23:26:52,671 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-03-10 23:26:53,434 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-03-10 23:26:54,207 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-03-10 23:26:54,971 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-03-10 23:26:55,759 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2021-03-10 23:26:56,560 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-03-10 23:26:57,339 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-03-10 23:26:58,106 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2021-03-10 23:26:58,892 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2021-03-10 23:26:59,678 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2021-03-10 23:27:00,496 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2021-03-10 23:27:01,350 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2021-03-10 23:27:02,200 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2021-03-10 23:27:03,071 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2021-03-10 23:27:03,926 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2021-03-10 23:27:04,810 WARN L205 SmtUtils]: Spent 265.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2021-03-10 23:27:05,674 WARN L205 SmtUtils]: Spent 268.00 ms on a formula simplification that was a NOOP. DAG size: 124 Received shutdown request... [2021-03-10 23:27:05,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-03-10 23:27:06,071 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-03-10 23:27:06,072 WARN L545 AbstractCegarLoop]: Verification canceled [2021-03-10 23:27:06,075 WARN L224 ceAbstractionStarter]: Timeout [2021-03-10 23:27:06,076 INFO L202 PluginConnector]: Adding new model simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.03 11:27:06 BasicIcfg [2021-03-10 23:27:06,076 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-10 23:27:06,076 INFO L168 Benchmark]: Toolchain (without parser) took 826161.86 ms. Allocated memory was 255.9 MB in the beginning and 685.8 MB in the end (delta: 429.9 MB). Free memory was 236.7 MB in the beginning and 178.2 MB in the end (delta: 58.5 MB). Peak memory consumption was 487.6 MB. Max. memory is 16.0 GB. [2021-03-10 23:27:06,076 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 255.9 MB. Free memory is still 237.7 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-03-10 23:27:06,076 INFO L168 Benchmark]: Boogie Procedure Inliner took 20.34 ms. Allocated memory is still 255.9 MB. Free memory was 236.2 MB in the beginning and 234.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-10 23:27:06,077 INFO L168 Benchmark]: Boogie Preprocessor took 11.11 ms. Allocated memory is still 255.9 MB. Free memory was 234.7 MB in the beginning and 233.8 MB in the end (delta: 866.3 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-10 23:27:06,077 INFO L168 Benchmark]: RCFGBuilder took 252.27 ms. Allocated memory is still 255.9 MB. Free memory was 233.7 MB in the beginning and 240.0 MB in the end (delta: -6.3 MB). Peak memory consumption was 18.5 MB. Max. memory is 16.0 GB. [2021-03-10 23:27:06,077 INFO L168 Benchmark]: TraceAbstraction took 825870.95 ms. Allocated memory was 255.9 MB in the beginning and 685.8 MB in the end (delta: 429.9 MB). Free memory was 239.5 MB in the beginning and 178.2 MB in the end (delta: 61.3 MB). Peak memory consumption was 490.1 MB. Max. memory is 16.0 GB. [2021-03-10 23:27:06,090 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 0.11 ms. Allocated memory is still 255.9 MB. Free memory is still 237.7 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 20.34 ms. Allocated memory is still 255.9 MB. Free memory was 236.2 MB in the beginning and 234.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 11.11 ms. Allocated memory is still 255.9 MB. Free memory was 234.7 MB in the beginning and 233.8 MB in the end (delta: 866.3 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 252.27 ms. Allocated memory is still 255.9 MB. Free memory was 233.7 MB in the beginning and 240.0 MB in the end (delta: -6.3 MB). Peak memory consumption was 18.5 MB. Max. memory is 16.0 GB. * TraceAbstraction took 825870.95 ms. Allocated memory was 255.9 MB in the beginning and 685.8 MB in the end (delta: 429.9 MB). Free memory was 239.5 MB in the beginning and 178.2 MB in the end (delta: 61.3 MB). Peak memory consumption was 490.1 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 46]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 46). Cancelled while BasicCegarLoop was constructing difference of abstraction (2343states) and FLOYD_HOARE automaton (currently 32 states, 77 states before enhancement),while ReachableStatesComputation was computing reachable states (61 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 14 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 825739.8ms, OverallIterations: 70, TraceHistogramMax: 37, EmptinessCheckTime: 69.0ms, AutomataDifference: 567463.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 28.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 6655 SDtfs, 63470 SDslu, 200627 SDs, 0 SdLazy, 63501 SolverSat, 16930 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 64614.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 8012 GetRequests, 3632 SyntacticMatches, 63 SemanticMatches, 4317 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182596 ImplicationChecksByTransitivity, 597566.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=2343occurred in iteration=69, InterpolantAutomatonStates: 2907, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 676.4ms AutomataMinimizationTime, 69 MinimizatonAttempts, 50059 StatesRemovedByMinimization, 66 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 407.8ms SsaConstructionTime, 2238.1ms SatisfiabilityAnalysisTime, 239219.9ms InterpolantComputationTime, 6517 NumberOfCodeBlocks, 6517 NumberOfCodeBlocksAsserted, 483 NumberOfCheckSat, 6379 ConstructedInterpolants, 81 QuantifiedInterpolants, 41205 SizeOfPredicates, 44 NumberOfNonLiveVariables, 13378 ConjunctsInSsa, 4137 ConjunctsInUnsatCore, 138 InterpolantComputations, 2 PerfectInterpolantSequences, 17232/68963 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown