/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/simple-queue.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-a47a088281b0b97d17910950432b7c5b5bc3adeb-a47a088 [2021-07-13 20:12:55,828 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-13 20:12:55,830 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-13 20:12:55,854 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-07-13 20:12:55,898 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-07-13 20:12:55,920 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-13 20:12:55,920 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-13 20:12:55,920 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-07-13 20:12:55,920 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-07-13 20:12:55,921 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-13 20:12:55,921 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-13 20:12:55,921 INFO L138 SettingsManager]: * Use SBE=true [2021-07-13 20:12:55,921 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-13 20:12:55,921 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-13 20:12:55,921 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-13 20:12:55,922 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-13 20:12:55,922 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-13 20:12:55,922 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-13 20:12:55,922 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-13 20:12:55,922 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-13 20:12:55,922 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-13 20:12:55,922 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-13 20:12:55,922 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-13 20:12:55,922 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-13 20:12:55,922 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-13 20:12:55,922 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-13 20:12:55,922 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-13 20:12:55,923 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-13 20:12:55,923 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-13 20:12:55,923 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-13 20:12:55,923 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-13 20:12:55,923 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-13 20:12:55,923 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-13 20:12:55,923 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-13 20:12:55,923 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-13 20:12:55,923 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-13 20:12:55,923 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-13 20:12:56,133 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-13 20:12:56,145 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-13 20:12:56,147 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-13 20:12:56,148 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-07-13 20:12:56,148 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-07-13 20:12:56,149 INFO L432 ainManager$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 [2021-07-13 20:12:56,149 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/simple-queue.wvr.bpl' [2021-07-13 20:12:56,176 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-13 20:12:56,177 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-07-13 20:12:56,178 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-13 20:12:56,178 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-13 20:12:56,178 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-13 20:12:56,188 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 13.07 08:12:56" (1/1) ... [2021-07-13 20:12:56,196 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 13.07 08:12:56" (1/1) ... [2021-07-13 20:12:56,201 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-13 20:12:56,202 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-13 20:12:56,202 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-13 20:12:56,203 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-13 20:12:56,208 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:12:56" (1/1) ... [2021-07-13 20:12:56,208 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:12:56" (1/1) ... [2021-07-13 20:12:56,208 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:12:56" (1/1) ... [2021-07-13 20:12:56,209 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:12:56" (1/1) ... [2021-07-13 20:12:56,210 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:12:56" (1/1) ... [2021-07-13 20:12:56,213 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:12:56" (1/1) ... [2021-07-13 20:12:56,214 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:12:56" (1/1) ... [2021-07-13 20:12:56,214 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-13 20:12:56,216 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-13 20:12:56,216 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-13 20:12:56,216 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-13 20:12:56,218 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:12:56" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-13 20:12:56,284 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-07-13 20:12:56,285 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-07-13 20:12:56,285 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-07-13 20:12:56,285 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-07-13 20:12:56,285 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-07-13 20:12:56,285 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-07-13 20:12:56,286 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-07-13 20:12:56,286 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-13 20:12:56,286 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-13 20:12:56,286 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-07-13 20:12:56,456 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-13 20:12:56,456 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-07-13 20:12:56,456 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread1EXIT is neither atomic block end nor error location. [2021-07-13 20:12:56,457 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread2EXIT is neither atomic block end nor error location. [2021-07-13 20:12:56,458 INFO L202 PluginConnector]: Adding new model simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 08:12:56 BoogieIcfgContainer [2021-07-13 20:12:56,458 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-13 20:12:56,459 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-13 20:12:56,459 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-13 20:12:56,461 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-13 20:12:56,461 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:12:56" (1/2) ... [2021-07-13 20:12:56,462 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22641d7d and model type simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 08:12:56, skipping insertion in model container [2021-07-13 20:12:56,462 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 08:12:56" (2/2) ... [2021-07-13 20:12:56,462 INFO L111 eAbstractionObserver]: Analyzing ICFG simple-queue.wvr.bpl [2021-07-13 20:12:56,466 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-13 20:12:56,466 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-13 20:12:56,466 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-13 20:12:56,467 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-13 20:12:56,497 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-07-13 20:12:56,511 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-07-13 20:12:56,528 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-13 20:12:56,529 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-13 20:12:56,529 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-13 20:12:56,529 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-13 20:12:56,529 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-13 20:12:56,529 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-13 20:12:56,529 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-13 20:12:56,529 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-13 20:12:56,534 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 46 flow [2021-07-13 20:12:56,558 INFO L132 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 13 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:56,559 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:56,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-07-13 20:12:56,563 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:12:56,563 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:12:56,564 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:12:56,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:12:56,567 INFO L82 PathProgramCache]: Analyzing trace with hash -262068682, now seen corresponding path program 1 times [2021-07-13 20:12:56,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:12:56,592 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399271498] [2021-07-13 20:12:56,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:12:56,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:12:56,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:12:56,713 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:12:56,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399271498] [2021-07-13 20:12:56,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399271498] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:12:56,715 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 20:12:56,715 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-07-13 20:12:56,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406580175] [2021-07-13 20:12:56,718 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-13 20:12:56,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:12:56,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-13 20:12:56,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 20:12:56,731 INFO L87 Difference]: Start difference. First operand has 13 states, 12 states have (on average 1.75) internal successors, (21), 12 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) 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) [2021-07-13 20:12:56,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:12:56,748 INFO L93 Difference]: Finished difference Result 20 states and 34 transitions. [2021-07-13 20:12:56,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-13 20:12:56,749 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 [2021-07-13 20:12:56,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:12:56,755 INFO L225 Difference]: With dead ends: 20 [2021-07-13 20:12:56,755 INFO L226 Difference]: Without dead ends: 16 [2021-07-13 20:12:56,756 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 20:12:56,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-07-13 20:12:56,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-07-13 20:12:56,782 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) [2021-07-13 20:12:56,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 27 transitions. [2021-07-13 20:12:56,784 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 27 transitions. Word has length 9 [2021-07-13 20:12:56,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:12:56,784 INFO L482 AbstractCegarLoop]: Abstraction has 16 states and 27 transitions. [2021-07-13 20:12:56,784 INFO L483 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) [2021-07-13 20:12:56,784 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 27 transitions. [2021-07-13 20:12:56,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-07-13 20:12:56,785 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:12:56,785 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:12:56,785 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-13 20:12:56,786 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:12:56,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:12:56,790 INFO L82 PathProgramCache]: Analyzing trace with hash 488876151, now seen corresponding path program 1 times [2021-07-13 20:12:56,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:12:56,792 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485984386] [2021-07-13 20:12:56,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:12:56,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:12:56,834 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:12:56,834 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:12:56,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485984386] [2021-07-13 20:12:56,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485984386] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:12:56,834 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 20:12:56,834 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-07-13 20:12:56,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655872905] [2021-07-13 20:12:56,835 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-13 20:12:56,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:12:56,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-13 20:12:56,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 20:12:56,837 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) [2021-07-13 20:12:56,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:12:56,846 INFO L93 Difference]: Finished difference Result 21 states and 34 transitions. [2021-07-13 20:12:56,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-13 20:12:56,847 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 [2021-07-13 20:12:56,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:12:56,848 INFO L225 Difference]: With dead ends: 21 [2021-07-13 20:12:56,848 INFO L226 Difference]: Without dead ends: 18 [2021-07-13 20:12:56,848 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 20:12:56,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-07-13 20:12:56,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-07-13 20:12:56,854 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) [2021-07-13 20:12:56,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 30 transitions. [2021-07-13 20:12:56,856 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 30 transitions. Word has length 10 [2021-07-13 20:12:56,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:12:56,856 INFO L482 AbstractCegarLoop]: Abstraction has 18 states and 30 transitions. [2021-07-13 20:12:56,856 INFO L483 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) [2021-07-13 20:12:56,856 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 30 transitions. [2021-07-13 20:12:56,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-07-13 20:12:56,857 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:12:56,857 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:12:56,857 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-07-13 20:12:56,857 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:12:56,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:12:56,859 INFO L82 PathProgramCache]: Analyzing trace with hash 426152002, now seen corresponding path program 1 times [2021-07-13 20:12:56,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:12:56,860 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676998776] [2021-07-13 20:12:56,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:12:56,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:12:56,901 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:12:56,901 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:12:56,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676998776] [2021-07-13 20:12:56,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676998776] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:56,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474474700] [2021-07-13 20:12:56,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:12:56,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:12:56,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:12:56,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:12:57,032 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 [2021-07-13 20:12:57,038 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:12:57,043 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:12:57,044 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:12:57,044 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-07-13 20:12:57,055 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:12:57,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1474474700] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:57,057 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:12:57,057 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-07-13 20:12:57,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665267372] [2021-07-13 20:12:57,058 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-13 20:12:57,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:12:57,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-13 20:12:57,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-13 20:12:57,063 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) [2021-07-13 20:12:57,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:12:57,101 INFO L93 Difference]: Finished difference Result 25 states and 43 transitions. [2021-07-13 20:12:57,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 20:12:57,102 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 [2021-07-13 20:12:57,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:12:57,102 INFO L225 Difference]: With dead ends: 25 [2021-07-13 20:12:57,103 INFO L226 Difference]: Without dead ends: 21 [2021-07-13 20:12:57,103 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 20.5ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-07-13 20:12:57,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-07-13 20:12:57,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-07-13 20:12:57,108 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) [2021-07-13 20:12:57,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 36 transitions. [2021-07-13 20:12:57,109 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 36 transitions. Word has length 11 [2021-07-13 20:12:57,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:12:57,109 INFO L482 AbstractCegarLoop]: Abstraction has 21 states and 36 transitions. [2021-07-13 20:12:57,109 INFO L483 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) [2021-07-13 20:12:57,109 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 36 transitions. [2021-07-13 20:12:57,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-07-13 20:12:57,110 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:12:57,110 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:12:57,321 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-07-13 20:12:57,321 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:12:57,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:12:57,322 INFO L82 PathProgramCache]: Analyzing trace with hash 348880875, now seen corresponding path program 2 times [2021-07-13 20:12:57,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:12:57,322 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192497558] [2021-07-13 20:12:57,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:12:57,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:12:57,354 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:12:57,354 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:12:57,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192497558] [2021-07-13 20:12:57,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192497558] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:57,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991917500] [2021-07-13 20:12:57,355 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:12:57,384 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:12:57,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:12:57,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2021-07-13 20:12:57,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:12:57,430 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:12:57,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991917500] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:57,430 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:12:57,430 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 4 [2021-07-13 20:12:57,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254639218] [2021-07-13 20:12:57,431 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-13 20:12:57,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:12:57,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-13 20:12:57,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-07-13 20:12:57,431 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) [2021-07-13 20:12:57,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:12:57,439 INFO L93 Difference]: Finished difference Result 50 states and 82 transitions. [2021-07-13 20:12:57,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-13 20:12:57,440 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 [2021-07-13 20:12:57,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:12:57,441 INFO L225 Difference]: With dead ends: 50 [2021-07-13 20:12:57,441 INFO L226 Difference]: Without dead ends: 45 [2021-07-13 20:12:57,442 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.8ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-07-13 20:12:57,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-07-13 20:12:57,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 33. [2021-07-13 20:12:57,445 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) [2021-07-13 20:12:57,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 62 transitions. [2021-07-13 20:12:57,445 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 62 transitions. Word has length 12 [2021-07-13 20:12:57,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:12:57,445 INFO L482 AbstractCegarLoop]: Abstraction has 33 states and 62 transitions. [2021-07-13 20:12:57,445 INFO L483 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) [2021-07-13 20:12:57,446 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 62 transitions. [2021-07-13 20:12:57,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-07-13 20:12:57,446 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:12:57,446 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:12:57,657 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:12:57,657 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:12:57,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:12:57,658 INFO L82 PathProgramCache]: Analyzing trace with hash 200515830, now seen corresponding path program 3 times [2021-07-13 20:12:57,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:12:57,658 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911644070] [2021-07-13 20:12:57,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:12:57,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:12:57,736 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:12:57,736 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:12:57,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911644070] [2021-07-13 20:12:57,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911644070] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:57,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743105203] [2021-07-13 20:12:57,737 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:12:57,759 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 20:12:57,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:12:57,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 20:12:57,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:12:57,801 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 [2021-07-13 20:12:57,803 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:12:57,804 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:12:57,804 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:12:57,805 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-07-13 20:12:57,811 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:12:57,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743105203] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:57,812 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:12:57,812 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-07-13 20:12:57,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462729378] [2021-07-13 20:12:57,812 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 20:12:57,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:12:57,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 20:12:57,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-07-13 20:12:57,813 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) [2021-07-13 20:12:57,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:12:57,881 INFO L93 Difference]: Finished difference Result 65 states and 115 transitions. [2021-07-13 20:12:57,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 20:12:57,881 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 [2021-07-13 20:12:57,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:12:57,882 INFO L225 Difference]: With dead ends: 65 [2021-07-13 20:12:57,882 INFO L226 Difference]: Without dead ends: 39 [2021-07-13 20:12:57,882 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 71.6ms TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:12:57,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-07-13 20:12:57,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 26. [2021-07-13 20:12:57,884 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) [2021-07-13 20:12:57,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 46 transitions. [2021-07-13 20:12:57,885 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 46 transitions. Word has length 13 [2021-07-13 20:12:57,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:12:57,885 INFO L482 AbstractCegarLoop]: Abstraction has 26 states and 46 transitions. [2021-07-13 20:12:57,885 INFO L483 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) [2021-07-13 20:12:57,885 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 46 transitions. [2021-07-13 20:12:57,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-13 20:12:57,886 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:12:57,886 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:12:58,104 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:12:58,105 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:12:58,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:12:58,105 INFO L82 PathProgramCache]: Analyzing trace with hash 1944094135, now seen corresponding path program 4 times [2021-07-13 20:12:58,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:12:58,106 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871179845] [2021-07-13 20:12:58,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:12:58,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:12:58,138 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:12:58,139 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:12:58,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871179845] [2021-07-13 20:12:58,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871179845] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:58,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684492804] [2021-07-13 20:12:58,139 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 [2021-07-13 20:12:58,198 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:12:58,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:12:58,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 20:12:58,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:12:58,234 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:12:58,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684492804] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:58,234 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:12:58,234 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-07-13 20:12:58,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013976938] [2021-07-13 20:12:58,235 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 20:12:58,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:12:58,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 20:12:58,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-07-13 20:12:58,235 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) [2021-07-13 20:12:58,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:12:58,248 INFO L93 Difference]: Finished difference Result 73 states and 125 transitions. [2021-07-13 20:12:58,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 20:12:58,249 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 [2021-07-13 20:12:58,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:12:58,251 INFO L225 Difference]: With dead ends: 73 [2021-07-13 20:12:58,251 INFO L226 Difference]: Without dead ends: 66 [2021-07-13 20:12:58,251 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 14.3ms TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-07-13 20:12:58,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-07-13 20:12:58,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 48. [2021-07-13 20:12:58,254 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) [2021-07-13 20:12:58,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 95 transitions. [2021-07-13 20:12:58,255 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 95 transitions. Word has length 14 [2021-07-13 20:12:58,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:12:58,255 INFO L482 AbstractCegarLoop]: Abstraction has 48 states and 95 transitions. [2021-07-13 20:12:58,255 INFO L483 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) [2021-07-13 20:12:58,255 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 95 transitions. [2021-07-13 20:12:58,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 20:12:58,256 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:12:58,256 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:12:58,456 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:12:58,457 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:12:58,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:12:58,457 INFO L82 PathProgramCache]: Analyzing trace with hash 1099206658, now seen corresponding path program 5 times [2021-07-13 20:12:58,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:12:58,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027161026] [2021-07-13 20:12:58,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:12:58,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:12:58,525 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:12:58,525 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:12:58,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027161026] [2021-07-13 20:12:58,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027161026] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:58,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403165251] [2021-07-13 20:12:58,525 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 [2021-07-13 20:12:58,553 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:12:58,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:12:58,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 20:12:58,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:12:58,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:12:58,758 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 [2021-07-13 20:12:58,760 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:12:58,763 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:12:58,770 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:12:58,771 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:19, output treesize:3 [2021-07-13 20:12:58,777 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:12:58,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1403165251] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:58,777 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:12:58,778 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-07-13 20:12:58,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514275171] [2021-07-13 20:12:58,778 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:12:58,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:12:58,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:12:58,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:12:58,780 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) [2021-07-13 20:12:59,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:12:59,124 INFO L93 Difference]: Finished difference Result 229 states and 428 transitions. [2021-07-13 20:12:59,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 20:12:59,124 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 [2021-07-13 20:12:59,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:12:59,127 INFO L225 Difference]: With dead ends: 229 [2021-07-13 20:12:59,127 INFO L226 Difference]: Without dead ends: 116 [2021-07-13 20:12:59,127 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 345.0ms TimeCoverageRelationStatistics Valid=207, Invalid=723, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:12:59,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-07-13 20:12:59,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 56. [2021-07-13 20:12:59,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 2.0545454545454547) internal successors, (113), 55 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:59,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 113 transitions. [2021-07-13 20:12:59,133 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 113 transitions. Word has length 15 [2021-07-13 20:12:59,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:12:59,133 INFO L482 AbstractCegarLoop]: Abstraction has 56 states and 113 transitions. [2021-07-13 20:12:59,133 INFO L483 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) [2021-07-13 20:12:59,133 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 113 transitions. [2021-07-13 20:12:59,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 20:12:59,134 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:12:59,134 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:12:59,352 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-07-13 20:12:59,353 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:12:59,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:12:59,353 INFO L82 PathProgramCache]: Analyzing trace with hash -449307722, now seen corresponding path program 6 times [2021-07-13 20:12:59,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:12:59,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192206975] [2021-07-13 20:12:59,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:12:59,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:12:59,451 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:12:59,451 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:12:59,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192206975] [2021-07-13 20:12:59,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192206975] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:59,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293362862] [2021-07-13 20:12:59,454 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 [2021-07-13 20:12:59,482 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:12:59,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:12:59,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 20:12:59,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:12:59,539 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 [2021-07-13 20:12:59,541 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:12:59,542 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:12:59,542 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:12:59,542 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-07-13 20:12:59,548 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:12:59,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [293362862] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:59,548 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:12:59,548 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-07-13 20:12:59,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088450883] [2021-07-13 20:12:59,548 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:12:59,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:12:59,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:12:59,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:12:59,551 INFO L87 Difference]: Start difference. First operand 56 states and 113 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) [2021-07-13 20:12:59,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:12:59,695 INFO L93 Difference]: Finished difference Result 121 states and 226 transitions. [2021-07-13 20:12:59,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 20:12:59,696 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 [2021-07-13 20:12:59,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:12:59,697 INFO L225 Difference]: With dead ends: 121 [2021-07-13 20:12:59,697 INFO L226 Difference]: Without dead ends: 77 [2021-07-13 20:12:59,697 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 152.0ms TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:12:59,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-07-13 20:12:59,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 36. [2021-07-13 20:12:59,708 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) [2021-07-13 20:12:59,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 66 transitions. [2021-07-13 20:12:59,710 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 66 transitions. Word has length 17 [2021-07-13 20:12:59,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:12:59,711 INFO L482 AbstractCegarLoop]: Abstraction has 36 states and 66 transitions. [2021-07-13 20:12:59,711 INFO L483 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) [2021-07-13 20:12:59,711 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 66 transitions. [2021-07-13 20:12:59,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 20:12:59,713 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:12:59,713 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:12:59,927 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:12:59,927 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:12:59,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:12:59,927 INFO L82 PathProgramCache]: Analyzing trace with hash -1020566793, now seen corresponding path program 7 times [2021-07-13 20:12:59,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:12:59,928 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951297751] [2021-07-13 20:12:59,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:12:59,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:12:59,976 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:12:59,976 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:12:59,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951297751] [2021-07-13 20:12:59,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951297751] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:59,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391049235] [2021-07-13 20:12:59,976 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 [2021-07-13 20:13:00,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:13:00,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 20:13:00,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:13:00,059 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:00,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391049235] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:00,060 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:13:00,060 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-07-13 20:13:00,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65654082] [2021-07-13 20:13:00,062 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 20:13:00,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:13:00,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 20:13:00,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-07-13 20:13:00,062 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) [2021-07-13 20:13:00,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:13:00,074 INFO L93 Difference]: Finished difference Result 128 states and 229 transitions. [2021-07-13 20:13:00,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 20:13:00,075 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 [2021-07-13 20:13:00,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:13:00,075 INFO L225 Difference]: With dead ends: 128 [2021-07-13 20:13:00,075 INFO L226 Difference]: Without dead ends: 117 [2021-07-13 20:13:00,075 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 19.7ms TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-07-13 20:13:00,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-07-13 20:13:00,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 87. [2021-07-13 20:13:00,078 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) [2021-07-13 20:13:00,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 179 transitions. [2021-07-13 20:13:00,078 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 179 transitions. Word has length 18 [2021-07-13 20:13:00,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:13:00,079 INFO L482 AbstractCegarLoop]: Abstraction has 87 states and 179 transitions. [2021-07-13 20:13:00,079 INFO L483 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) [2021-07-13 20:13:00,079 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 179 transitions. [2021-07-13 20:13:00,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 20:13:00,079 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:13:00,079 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:13:00,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:13:00,293 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:13:00,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:13:00,293 INFO L82 PathProgramCache]: Analyzing trace with hash -1344581694, now seen corresponding path program 8 times [2021-07-13 20:13:00,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:13:00,294 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091678652] [2021-07-13 20:13:00,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:13:00,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:13:00,411 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:00,411 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:13:00,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091678652] [2021-07-13 20:13:00,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091678652] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:00,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913585650] [2021-07-13 20:13:00,412 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) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:13:00,434 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:13:00,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:13:00,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 20:13:00,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:13:00,494 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 [2021-07-13 20:13:00,495 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:13:00,496 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:13:00,497 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:13:00,497 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-07-13 20:13:00,509 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:00,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [913585650] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:00,509 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:13:00,509 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-07-13 20:13:00,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17579457] [2021-07-13 20:13:00,510 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:13:00,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:13:00,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:13:00,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:13:00,511 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) [2021-07-13 20:13:00,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:13:00,677 INFO L93 Difference]: Finished difference Result 179 states and 337 transitions. [2021-07-13 20:13:00,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 20:13:00,678 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 [2021-07-13 20:13:00,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:13:00,678 INFO L225 Difference]: With dead ends: 179 [2021-07-13 20:13:00,679 INFO L226 Difference]: Without dead ends: 105 [2021-07-13 20:13:00,679 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 198.7ms TimeCoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:13:00,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-07-13 20:13:00,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 41. [2021-07-13 20:13:00,685 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) [2021-07-13 20:13:00,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 76 transitions. [2021-07-13 20:13:00,686 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 76 transitions. Word has length 19 [2021-07-13 20:13:00,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:13:00,686 INFO L482 AbstractCegarLoop]: Abstraction has 41 states and 76 transitions. [2021-07-13 20:13:00,686 INFO L483 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) [2021-07-13 20:13:00,686 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 76 transitions. [2021-07-13 20:13:00,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 20:13:00,687 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:13:00,687 INFO L508 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:13:00,900 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-07-13 20:13:00,901 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:13:00,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:13:00,901 INFO L82 PathProgramCache]: Analyzing trace with hash 1290711147, now seen corresponding path program 9 times [2021-07-13 20:13:00,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:13:00,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062654748] [2021-07-13 20:13:00,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:13:00,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:13:00,945 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:00,945 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:13:00,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062654748] [2021-07-13 20:13:00,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062654748] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:00,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977905294] [2021-07-13 20:13:00,946 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) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:13:00,980 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:13:00,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:13:00,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 20:13:00,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:13:01,019 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:01,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977905294] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:01,019 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:13:01,019 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-07-13 20:13:01,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615964791] [2021-07-13 20:13:01,020 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 20:13:01,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:13:01,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 20:13:01,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-07-13 20:13:01,020 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) [2021-07-13 20:13:01,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:13:01,034 INFO L93 Difference]: Finished difference Result 160 states and 290 transitions. [2021-07-13 20:13:01,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 20:13:01,041 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 [2021-07-13 20:13:01,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:13:01,042 INFO L225 Difference]: With dead ends: 160 [2021-07-13 20:13:01,042 INFO L226 Difference]: Without dead ends: 147 [2021-07-13 20:13:01,043 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 19.6ms TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-07-13 20:13:01,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-07-13 20:13:01,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 111. [2021-07-13 20:13:01,050 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) [2021-07-13 20:13:01,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 230 transitions. [2021-07-13 20:13:01,051 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 230 transitions. Word has length 20 [2021-07-13 20:13:01,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:13:01,051 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 230 transitions. [2021-07-13 20:13:01,051 INFO L483 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) [2021-07-13 20:13:01,051 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 230 transitions. [2021-07-13 20:13:01,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 20:13:01,053 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:13:01,053 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:13:01,269 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:13:01,269 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:13:01,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:13:01,270 INFO L82 PathProgramCache]: Analyzing trace with hash -849963402, now seen corresponding path program 10 times [2021-07-13 20:13:01,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:13:01,270 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654714774] [2021-07-13 20:13:01,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:13:01,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:13:01,391 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:01,391 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:13:01,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654714774] [2021-07-13 20:13:01,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654714774] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:01,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539007064] [2021-07-13 20:13:01,391 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 [2021-07-13 20:13:01,414 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:13:01,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:13:01,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:13:01,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:13:01,472 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 [2021-07-13 20:13:01,474 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:13:01,476 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:13:01,476 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:13:01,476 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-07-13 20:13:01,481 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:01,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539007064] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:01,482 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:13:01,482 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-07-13 20:13:01,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170292749] [2021-07-13 20:13:01,482 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:13:01,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:13:01,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:13:01,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:13:01,483 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) [2021-07-13 20:13:01,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:13:01,734 INFO L93 Difference]: Finished difference Result 229 states and 435 transitions. [2021-07-13 20:13:01,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 20:13:01,734 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 [2021-07-13 20:13:01,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:13:01,735 INFO L225 Difference]: With dead ends: 229 [2021-07-13 20:13:01,735 INFO L226 Difference]: Without dead ends: 135 [2021-07-13 20:13:01,735 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 277.4ms TimeCoverageRelationStatistics Valid=135, Invalid=567, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:13:01,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-07-13 20:13:01,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 46. [2021-07-13 20:13:01,740 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) [2021-07-13 20:13:01,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 86 transitions. [2021-07-13 20:13:01,740 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 86 transitions. Word has length 21 [2021-07-13 20:13:01,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:13:01,740 INFO L482 AbstractCegarLoop]: Abstraction has 46 states and 86 transitions. [2021-07-13 20:13:01,740 INFO L483 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) [2021-07-13 20:13:01,740 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 86 transitions. [2021-07-13 20:13:01,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 20:13:01,741 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:13:01,741 INFO L508 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:13:01,944 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:13:01,945 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:13:01,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:13:01,945 INFO L82 PathProgramCache]: Analyzing trace with hash -555990985, now seen corresponding path program 11 times [2021-07-13 20:13:01,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:13:01,946 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95053234] [2021-07-13 20:13:01,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:13:01,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:13:01,998 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:01,998 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:13:01,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95053234] [2021-07-13 20:13:01,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95053234] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:01,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281295569] [2021-07-13 20:13:01,998 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 [2021-07-13 20:13:02,024 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 20:13:02,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:13:02,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-13 20:13:02,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:13:02,091 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:02,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [281295569] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:02,091 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:13:02,091 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-07-13 20:13:02,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261033318] [2021-07-13 20:13:02,091 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 20:13:02,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:13:02,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 20:13:02,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-07-13 20:13:02,092 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) [2021-07-13 20:13:02,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:13:02,107 INFO L93 Difference]: Finished difference Result 195 states and 357 transitions. [2021-07-13 20:13:02,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 20:13:02,107 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 [2021-07-13 20:13:02,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:13:02,108 INFO L225 Difference]: With dead ends: 195 [2021-07-13 20:13:02,108 INFO L226 Difference]: Without dead ends: 180 [2021-07-13 20:13:02,108 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 22.9ms TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-07-13 20:13:02,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-07-13 20:13:02,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 138. [2021-07-13 20:13:02,110 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) [2021-07-13 20:13:02,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 287 transitions. [2021-07-13 20:13:02,111 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 287 transitions. Word has length 22 [2021-07-13 20:13:02,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:13:02,111 INFO L482 AbstractCegarLoop]: Abstraction has 138 states and 287 transitions. [2021-07-13 20:13:02,111 INFO L483 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) [2021-07-13 20:13:02,111 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 287 transitions. [2021-07-13 20:13:02,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 20:13:02,111 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:13:02,112 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:13:02,325 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-07-13 20:13:02,325 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:13:02,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:13:02,325 INFO L82 PathProgramCache]: Analyzing trace with hash -454897790, now seen corresponding path program 12 times [2021-07-13 20:13:02,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:13:02,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296050979] [2021-07-13 20:13:02,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:13:02,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:13:02,476 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:02,477 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:13:02,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296050979] [2021-07-13 20:13:02,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296050979] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:02,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359564427] [2021-07-13 20:13:02,477 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 [2021-07-13 20:13:02,505 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 20:13:02,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:13:02,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 20:13:02,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:13:02,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:13:02,873 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 [2021-07-13 20:13:02,874 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:13:02,878 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:13:02,879 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:13:02,880 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:19, output treesize:3 [2021-07-13 20:13:02,885 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 21 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:02,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [359564427] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:02,885 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:13:02,885 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-07-13 20:13:02,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168043581] [2021-07-13 20:13:02,886 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-13 20:13:02,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:13:02,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-13 20:13:02,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=780, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:13:02,887 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) [2021-07-13 20:13:04,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:13:04,373 INFO L93 Difference]: Finished difference Result 869 states and 1674 transitions. [2021-07-13 20:13:04,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-07-13 20:13:04,373 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 [2021-07-13 20:13:04,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:13:04,376 INFO L225 Difference]: With dead ends: 869 [2021-07-13 20:13:04,376 INFO L226 Difference]: Without dead ends: 472 [2021-07-13 20:13:04,378 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1485 ImplicationChecksByTransitivity, 1540.1ms TimeCoverageRelationStatistics Valid=1224, Invalid=5256, Unknown=0, NotChecked=0, Total=6480 [2021-07-13 20:13:04,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2021-07-13 20:13:04,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 150. [2021-07-13 20:13:04,382 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) [2021-07-13 20:13:04,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 313 transitions. [2021-07-13 20:13:04,383 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 313 transitions. Word has length 23 [2021-07-13 20:13:04,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:13:04,383 INFO L482 AbstractCegarLoop]: Abstraction has 150 states and 313 transitions. [2021-07-13 20:13:04,383 INFO L483 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) [2021-07-13 20:13:04,383 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 313 transitions. [2021-07-13 20:13:04,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:13:04,385 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:13:04,385 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:13:04,601 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-07-13 20:13:04,602 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:13:04,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:13:04,602 INFO L82 PathProgramCache]: Analyzing trace with hash 1467420982, now seen corresponding path program 13 times [2021-07-13 20:13:04,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:13:04,602 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687902359] [2021-07-13 20:13:04,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:13:04,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:13:04,768 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:04,768 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:13:04,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687902359] [2021-07-13 20:13:04,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687902359] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:04,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72219855] [2021-07-13 20:13:04,769 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 [2021-07-13 20:13:04,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:13:04,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-13 20:13:04,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:13:04,849 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 [2021-07-13 20:13:04,851 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:13:04,852 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:13:04,852 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:13:04,853 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-07-13 20:13:04,858 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:04,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [72219855] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:04,858 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:13:04,858 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-07-13 20:13:04,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611369287] [2021-07-13 20:13:04,858 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:13:04,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:13:04,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:13:04,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:13:04,859 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) [2021-07-13 20:13:05,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:13:05,230 INFO L93 Difference]: Finished difference Result 325 states and 626 transitions. [2021-07-13 20:13:05,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 20:13:05,230 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 [2021-07-13 20:13:05,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:13:05,231 INFO L225 Difference]: With dead ends: 325 [2021-07-13 20:13:05,231 INFO L226 Difference]: Without dead ends: 205 [2021-07-13 20:13:05,232 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 357.7ms TimeCoverageRelationStatistics Valid=211, Invalid=979, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:13:05,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-07-13 20:13:05,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 56. [2021-07-13 20:13:05,233 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) [2021-07-13 20:13:05,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 106 transitions. [2021-07-13 20:13:05,234 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 106 transitions. Word has length 25 [2021-07-13 20:13:05,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:13:05,234 INFO L482 AbstractCegarLoop]: Abstraction has 56 states and 106 transitions. [2021-07-13 20:13:05,234 INFO L483 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) [2021-07-13 20:13:05,234 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 106 transitions. [2021-07-13 20:13:05,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:13:05,234 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:13:05,234 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:13:05,434 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-07-13 20:13:05,435 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:13:05,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:13:05,435 INFO L82 PathProgramCache]: Analyzing trace with hash -1731519113, now seen corresponding path program 14 times [2021-07-13 20:13:05,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:13:05,435 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732196283] [2021-07-13 20:13:05,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:13:05,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:13:05,491 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:05,491 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:13:05,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732196283] [2021-07-13 20:13:05,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732196283] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:05,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695320278] [2021-07-13 20:13:05,492 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 [2021-07-13 20:13:05,516 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:13:05,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:13:05,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 20:13:05,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:13:05,569 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:05,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695320278] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:05,569 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:13:05,569 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-13 20:13:05,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417136406] [2021-07-13 20:13:05,570 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:13:05,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:13:05,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:13:05,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:13:05,570 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) [2021-07-13 20:13:05,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:13:05,589 INFO L93 Difference]: Finished difference Result 274 states and 509 transitions. [2021-07-13 20:13:05,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 20:13:05,590 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 [2021-07-13 20:13:05,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:13:05,590 INFO L225 Difference]: With dead ends: 274 [2021-07-13 20:13:05,590 INFO L226 Difference]: Without dead ends: 255 [2021-07-13 20:13:05,591 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 36.4ms TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:13:05,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-07-13 20:13:05,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 201. [2021-07-13 20:13:05,594 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) [2021-07-13 20:13:05,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 419 transitions. [2021-07-13 20:13:05,594 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 419 transitions. Word has length 26 [2021-07-13 20:13:05,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:13:05,595 INFO L482 AbstractCegarLoop]: Abstraction has 201 states and 419 transitions. [2021-07-13 20:13:05,595 INFO L483 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) [2021-07-13 20:13:05,595 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 419 transitions. [2021-07-13 20:13:05,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:13:05,595 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:13:05,595 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:13:05,808 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:13:05,809 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:13:05,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:13:05,809 INFO L82 PathProgramCache]: Analyzing trace with hash 252907330, now seen corresponding path program 15 times [2021-07-13 20:13:05,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:13:05,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46094585] [2021-07-13 20:13:05,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:13:05,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:13:06,017 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:06,017 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:13:06,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46094585] [2021-07-13 20:13:06,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46094585] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:06,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44578568] [2021-07-13 20:13:06,017 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:13:06,060 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 20:13:06,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:13:06,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 39 conjunts are in the unsatisfiable core [2021-07-13 20:13:06,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:13:06,107 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 [2021-07-13 20:13:06,108 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:13:06,109 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:13:06,109 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:13:06,109 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-07-13 20:13:06,113 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:06,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44578568] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:06,113 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:13:06,113 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2021-07-13 20:13:06,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987130138] [2021-07-13 20:13:06,114 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 20:13:06,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:13:06,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 20:13:06,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:13:06,114 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) [2021-07-13 20:13:06,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:13:06,540 INFO L93 Difference]: Finished difference Result 415 states and 801 transitions. [2021-07-13 20:13:06,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 20:13:06,540 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 [2021-07-13 20:13:06,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:13:06,541 INFO L225 Difference]: With dead ends: 415 [2021-07-13 20:13:06,541 INFO L226 Difference]: Without dead ends: 249 [2021-07-13 20:13:06,542 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 448.7ms TimeCoverageRelationStatistics Valid=255, Invalid=1227, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:13:06,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-07-13 20:13:06,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 61. [2021-07-13 20:13:06,544 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) [2021-07-13 20:13:06,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 116 transitions. [2021-07-13 20:13:06,544 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 116 transitions. Word has length 27 [2021-07-13 20:13:06,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:13:06,544 INFO L482 AbstractCegarLoop]: Abstraction has 61 states and 116 transitions. [2021-07-13 20:13:06,544 INFO L483 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) [2021-07-13 20:13:06,544 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 116 transitions. [2021-07-13 20:13:06,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:13:06,544 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:13:06,545 INFO L508 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:13:06,749 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-07-13 20:13:06,749 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:13:06,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:13:06,749 INFO L82 PathProgramCache]: Analyzing trace with hash -726736661, now seen corresponding path program 16 times [2021-07-13 20:13:06,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:13:06,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101673259] [2021-07-13 20:13:06,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:13:06,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:13:06,830 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:06,831 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:13:06,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101673259] [2021-07-13 20:13:06,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101673259] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:06,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389010630] [2021-07-13 20:13:06,831 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:13:06,857 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:13:06,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:13:06,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 20:13:06,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:13:06,904 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:06,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389010630] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:06,904 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:13:06,904 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-13 20:13:06,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920111383] [2021-07-13 20:13:06,904 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:13:06,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:13:06,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:13:06,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:13:06,905 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) [2021-07-13 20:13:06,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:13:06,926 INFO L93 Difference]: Finished difference Result 318 states and 594 transitions. [2021-07-13 20:13:06,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 20:13:06,926 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 [2021-07-13 20:13:06,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:13:06,927 INFO L225 Difference]: With dead ends: 318 [2021-07-13 20:13:06,927 INFO L226 Difference]: Without dead ends: 297 [2021-07-13 20:13:06,927 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 44.1ms TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:13:06,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2021-07-13 20:13:06,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 237. [2021-07-13 20:13:06,931 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) [2021-07-13 20:13:06,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 494 transitions. [2021-07-13 20:13:06,931 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 494 transitions. Word has length 28 [2021-07-13 20:13:06,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:13:06,932 INFO L482 AbstractCegarLoop]: Abstraction has 237 states and 494 transitions. [2021-07-13 20:13:06,932 INFO L483 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) [2021-07-13 20:13:06,932 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 494 transitions. [2021-07-13 20:13:06,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 20:13:06,932 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:13:06,932 INFO L508 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:13:07,140 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-07-13 20:13:07,141 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:13:07,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:13:07,141 INFO L82 PathProgramCache]: Analyzing trace with hash -658404362, now seen corresponding path program 17 times [2021-07-13 20:13:07,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:13:07,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473285555] [2021-07-13 20:13:07,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:13:07,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:13:07,387 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:07,388 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:13:07,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473285555] [2021-07-13 20:13:07,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473285555] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:07,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078666734] [2021-07-13 20:13:07,388 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 [2021-07-13 20:13:07,416 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 20:13:07,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:13:07,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:13:07,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:13:08,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:13:08,067 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 [2021-07-13 20:13:08,068 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:13:08,071 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:13:08,072 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:13:08,072 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:19, output treesize:3 [2021-07-13 20:13:08,076 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 45 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:08,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078666734] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:08,076 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:13:08,076 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-07-13 20:13:08,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057202652] [2021-07-13 20:13:08,076 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-07-13 20:13:08,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:13:08,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-07-13 20:13:08,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=1533, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 20:13:08,077 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) [2021-07-13 20:13:11,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:13:11,321 INFO L93 Difference]: Finished difference Result 1727 states and 3354 transitions. [2021-07-13 20:13:11,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-07-13 20:13:11,321 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 [2021-07-13 20:13:11,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:13:11,325 INFO L225 Difference]: With dead ends: 1727 [2021-07-13 20:13:11,325 INFO L226 Difference]: Without dead ends: 1012 [2021-07-13 20:13:11,328 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4325 ImplicationChecksByTransitivity, 3393.9ms TimeCoverageRelationStatistics Valid=2986, Invalid=13526, Unknown=0, NotChecked=0, Total=16512 [2021-07-13 20:13:11,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1012 states. [2021-07-13 20:13:11,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1012 to 252. [2021-07-13 20:13:11,335 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) [2021-07-13 20:13:11,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 526 transitions. [2021-07-13 20:13:11,335 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 526 transitions. Word has length 29 [2021-07-13 20:13:11,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:13:11,336 INFO L482 AbstractCegarLoop]: Abstraction has 252 states and 526 transitions. [2021-07-13 20:13:11,336 INFO L483 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) [2021-07-13 20:13:11,336 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 526 transitions. [2021-07-13 20:13:11,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-13 20:13:11,337 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:13:11,337 INFO L508 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:13:11,553 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:13:11,553 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:13:11,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:13:11,553 INFO L82 PathProgramCache]: Analyzing trace with hash -1964765438, now seen corresponding path program 18 times [2021-07-13 20:13:11,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:13:11,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020988607] [2021-07-13 20:13:11,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:13:11,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:13:11,845 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:11,846 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:13:11,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020988607] [2021-07-13 20:13:11,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020988607] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:11,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130396988] [2021-07-13 20:13:11,846 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:13:11,885 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-13 20:13:11,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:13:11,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-13 20:13:11,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:13:11,940 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 [2021-07-13 20:13:11,941 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:13:11,942 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:13:11,942 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:13:11,942 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-07-13 20:13:11,946 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:11,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130396988] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:11,946 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:13:11,946 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2021-07-13 20:13:11,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014845516] [2021-07-13 20:13:11,947 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 20:13:11,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:13:11,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 20:13:11,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:13:11,947 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) [2021-07-13 20:13:12,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:13:12,567 INFO L93 Difference]: Finished difference Result 541 states and 1052 transitions. [2021-07-13 20:13:12,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 20:13:12,567 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 [2021-07-13 20:13:12,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:13:12,568 INFO L225 Difference]: With dead ends: 541 [2021-07-13 20:13:12,568 INFO L226 Difference]: Without dead ends: 343 [2021-07-13 20:13:12,568 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 663.3ms TimeCoverageRelationStatistics Valid=355, Invalid=1807, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 20:13:12,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2021-07-13 20:13:12,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 71. [2021-07-13 20:13:12,571 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) [2021-07-13 20:13:12,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 136 transitions. [2021-07-13 20:13:12,571 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 136 transitions. Word has length 31 [2021-07-13 20:13:12,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:13:12,571 INFO L482 AbstractCegarLoop]: Abstraction has 71 states and 136 transitions. [2021-07-13 20:13:12,571 INFO L483 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) [2021-07-13 20:13:12,571 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 136 transitions. [2021-07-13 20:13:12,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-13 20:13:12,571 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:13:12,572 INFO L508 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:13:12,787 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:13:12,788 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:13:12,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:13:12,788 INFO L82 PathProgramCache]: Analyzing trace with hash -755115733, now seen corresponding path program 19 times [2021-07-13 20:13:12,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:13:12,788 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157833395] [2021-07-13 20:13:12,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:13:12,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:13:12,880 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 78 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:12,881 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:13:12,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157833395] [2021-07-13 20:13:12,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157833395] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:12,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432862753] [2021-07-13 20:13:12,881 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:13:12,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:13:12,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 20:13:12,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:13:12,967 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 78 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:12,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [432862753] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:12,967 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:13:12,967 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-13 20:13:12,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109385421] [2021-07-13 20:13:12,967 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:13:12,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:13:12,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:13:12,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:13:12,968 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) [2021-07-13 20:13:12,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:13:12,993 INFO L93 Difference]: Finished difference Result 415 states and 782 transitions. [2021-07-13 20:13:12,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 20:13:12,993 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 [2021-07-13 20:13:12,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:13:12,994 INFO L225 Difference]: With dead ends: 415 [2021-07-13 20:13:12,994 INFO L226 Difference]: Without dead ends: 390 [2021-07-13 20:13:12,995 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 62.8ms TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:13:12,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2021-07-13 20:13:12,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 318. [2021-07-13 20:13:12,999 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) [2021-07-13 20:13:12,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 662 transitions. [2021-07-13 20:13:12,999 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 662 transitions. Word has length 32 [2021-07-13 20:13:12,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:13:12,999 INFO L482 AbstractCegarLoop]: Abstraction has 318 states and 662 transitions. [2021-07-13 20:13:12,999 INFO L483 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) [2021-07-13 20:13:12,999 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 662 transitions. [2021-07-13 20:13:13,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:13:13,001 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:13:13,001 INFO L508 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:13:13,217 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:13:13,217 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:13:13,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:13:13,217 INFO L82 PathProgramCache]: Analyzing trace with hash -396491082, now seen corresponding path program 20 times [2021-07-13 20:13:13,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:13:13,218 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014110596] [2021-07-13 20:13:13,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:13:13,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:13:13,527 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:13,527 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:13:13,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014110596] [2021-07-13 20:13:13,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014110596] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:13,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771496668] [2021-07-13 20:13:13,528 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:13:13,554 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:13:13,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:13:13,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-13 20:13:13,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:13:13,612 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 [2021-07-13 20:13:13,613 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:13:13,614 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:13:13,614 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:13:13,614 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-07-13 20:13:13,619 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:13,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771496668] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:13,619 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:13:13,619 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2021-07-13 20:13:13,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886729169] [2021-07-13 20:13:13,619 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:13:13,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:13:13,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:13:13,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:13:13,620 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) [2021-07-13 20:13:14,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:13:14,311 INFO L93 Difference]: Finished difference Result 655 states and 1275 transitions. [2021-07-13 20:13:14,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 20:13:14,311 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 [2021-07-13 20:13:14,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:13:14,312 INFO L225 Difference]: With dead ends: 655 [2021-07-13 20:13:14,312 INFO L226 Difference]: Without dead ends: 399 [2021-07-13 20:13:14,313 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 781.4ms TimeCoverageRelationStatistics Valid=411, Invalid=2139, Unknown=0, NotChecked=0, Total=2550 [2021-07-13 20:13:14,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2021-07-13 20:13:14,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 76. [2021-07-13 20:13:14,315 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) [2021-07-13 20:13:14,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 146 transitions. [2021-07-13 20:13:14,315 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 146 transitions. Word has length 33 [2021-07-13 20:13:14,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:13:14,316 INFO L482 AbstractCegarLoop]: Abstraction has 76 states and 146 transitions. [2021-07-13 20:13:14,316 INFO L483 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) [2021-07-13 20:13:14,316 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 146 transitions. [2021-07-13 20:13:14,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-13 20:13:14,316 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:13:14,316 INFO L508 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:13:14,532 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-07-13 20:13:14,532 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:13:14,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:13:14,533 INFO L82 PathProgramCache]: Analyzing trace with hash 616749047, now seen corresponding path program 21 times [2021-07-13 20:13:14,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:13:14,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750659046] [2021-07-13 20:13:14,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:13:14,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:13:14,627 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:14,627 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:13:14,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750659046] [2021-07-13 20:13:14,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750659046] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:14,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529291142] [2021-07-13 20:13:14,627 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:13:14,658 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-07-13 20:13:14,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:13:14,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:13:14,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:13:14,720 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:14,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529291142] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:14,720 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:13:14,720 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-07-13 20:13:14,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982818837] [2021-07-13 20:13:14,720 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:13:14,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:13:14,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:13:14,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:13:14,721 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) [2021-07-13 20:13:14,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:13:14,749 INFO L93 Difference]: Finished difference Result 468 states and 885 transitions. [2021-07-13 20:13:14,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 20:13:14,749 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 [2021-07-13 20:13:14,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:13:14,751 INFO L225 Difference]: With dead ends: 468 [2021-07-13 20:13:14,751 INFO L226 Difference]: Without dead ends: 441 [2021-07-13 20:13:14,751 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 69.0ms TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:13:14,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2021-07-13 20:13:14,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 363. [2021-07-13 20:13:14,755 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) [2021-07-13 20:13:14,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 755 transitions. [2021-07-13 20:13:14,756 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 755 transitions. Word has length 34 [2021-07-13 20:13:14,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:13:14,756 INFO L482 AbstractCegarLoop]: Abstraction has 363 states and 755 transitions. [2021-07-13 20:13:14,756 INFO L483 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) [2021-07-13 20:13:14,756 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 755 transitions. [2021-07-13 20:13:14,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-13 20:13:14,757 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:13:14,757 INFO L508 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:13:14,972 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-07-13 20:13:14,973 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:13:14,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:13:14,973 INFO L82 PathProgramCache]: Analyzing trace with hash 1657654978, now seen corresponding path program 22 times [2021-07-13 20:13:14,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:13:14,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495178450] [2021-07-13 20:13:14,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:13:14,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:13:15,315 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:15,315 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:13:15,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495178450] [2021-07-13 20:13:15,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495178450] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:15,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101959320] [2021-07-13 20:13:15,315 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:13:15,343 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:13:15,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:13:15,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 55 conjunts are in the unsatisfiable core [2021-07-13 20:13:15,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:13:15,410 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 [2021-07-13 20:13:15,410 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:13:15,411 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:13:15,412 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:13:15,412 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-07-13 20:13:15,417 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:15,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101959320] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:15,417 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:13:15,417 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2021-07-13 20:13:15,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264941365] [2021-07-13 20:13:15,417 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-13 20:13:15,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:13:15,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-13 20:13:15,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:13:15,418 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) [2021-07-13 20:13:16,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:13:16,228 INFO L93 Difference]: Finished difference Result 747 states and 1457 transitions. [2021-07-13 20:13:16,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 20:13:16,229 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 [2021-07-13 20:13:16,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:13:16,230 INFO L225 Difference]: With dead ends: 747 [2021-07-13 20:13:16,230 INFO L226 Difference]: Without dead ends: 457 [2021-07-13 20:13:16,231 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 900.5ms TimeCoverageRelationStatistics Valid=471, Invalid=2499, Unknown=0, NotChecked=0, Total=2970 [2021-07-13 20:13:16,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2021-07-13 20:13:16,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 81. [2021-07-13 20:13:16,233 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) [2021-07-13 20:13:16,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 156 transitions. [2021-07-13 20:13:16,233 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 156 transitions. Word has length 35 [2021-07-13 20:13:16,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:13:16,233 INFO L482 AbstractCegarLoop]: Abstraction has 81 states and 156 transitions. [2021-07-13 20:13:16,233 INFO L483 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) [2021-07-13 20:13:16,233 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 156 transitions. [2021-07-13 20:13:16,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:13:16,234 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:13:16,234 INFO L508 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:13:16,444 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:13:16,445 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:13:16,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:13:16,445 INFO L82 PathProgramCache]: Analyzing trace with hash -129232533, now seen corresponding path program 23 times [2021-07-13 20:13:16,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:13:16,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154441894] [2021-07-13 20:13:16,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:13:16,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:13:16,556 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 105 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:16,556 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:13:16,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154441894] [2021-07-13 20:13:16,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154441894] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:16,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698529473] [2021-07-13 20:13:16,556 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:13:16,593 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-07-13 20:13:16,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:13:16,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-13 20:13:16,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:13:16,654 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 105 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:16,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698529473] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:16,655 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:13:16,655 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-07-13 20:13:16,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576843750] [2021-07-13 20:13:16,655 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:13:16,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:13:16,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:13:16,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:13:16,656 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) [2021-07-13 20:13:16,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:13:16,684 INFO L93 Difference]: Finished difference Result 524 states and 994 transitions. [2021-07-13 20:13:16,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 20:13:16,684 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 [2021-07-13 20:13:16,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:13:16,685 INFO L225 Difference]: With dead ends: 524 [2021-07-13 20:13:16,685 INFO L226 Difference]: Without dead ends: 495 [2021-07-13 20:13:16,686 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 89.3ms TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:13:16,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2021-07-13 20:13:16,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 411. [2021-07-13 20:13:16,692 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) [2021-07-13 20:13:16,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 854 transitions. [2021-07-13 20:13:16,692 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 854 transitions. Word has length 36 [2021-07-13 20:13:16,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:13:16,693 INFO L482 AbstractCegarLoop]: Abstraction has 411 states and 854 transitions. [2021-07-13 20:13:16,693 INFO L483 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) [2021-07-13 20:13:16,693 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 854 transitions. [2021-07-13 20:13:16,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-13 20:13:16,693 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:13:16,693 INFO L508 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:13:16,900 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-07-13 20:13:16,900 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:13:16,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:13:16,900 INFO L82 PathProgramCache]: Analyzing trace with hash -546012810, now seen corresponding path program 24 times [2021-07-13 20:13:16,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:13:16,900 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775020846] [2021-07-13 20:13:16,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:13:16,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:13:17,284 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:17,284 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:13:17,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775020846] [2021-07-13 20:13:17,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775020846] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:17,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964435358] [2021-07-13 20:13:17,284 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:13:17,314 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-07-13 20:13:17,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:13:17,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 59 conjunts are in the unsatisfiable core [2021-07-13 20:13:17,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:13:17,376 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 [2021-07-13 20:13:17,377 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:13:17,378 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:13:17,378 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:13:17,378 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-07-13 20:13:17,382 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:17,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964435358] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:17,382 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:13:17,382 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2021-07-13 20:13:17,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711946041] [2021-07-13 20:13:17,382 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-13 20:13:17,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:13:17,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-13 20:13:17,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:13:17,384 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) [2021-07-13 20:13:18,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:13:18,334 INFO L93 Difference]: Finished difference Result 845 states and 1651 transitions. [2021-07-13 20:13:18,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 20:13:18,334 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 [2021-07-13 20:13:18,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:13:18,336 INFO L225 Difference]: With dead ends: 845 [2021-07-13 20:13:18,336 INFO L226 Difference]: Without dead ends: 519 [2021-07-13 20:13:18,337 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 1042.0ms TimeCoverageRelationStatistics Valid=535, Invalid=2887, Unknown=0, NotChecked=0, Total=3422 [2021-07-13 20:13:18,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2021-07-13 20:13:18,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 86. [2021-07-13 20:13:18,341 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) [2021-07-13 20:13:18,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 166 transitions. [2021-07-13 20:13:18,341 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 166 transitions. Word has length 37 [2021-07-13 20:13:18,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:13:18,341 INFO L482 AbstractCegarLoop]: Abstraction has 86 states and 166 transitions. [2021-07-13 20:13:18,341 INFO L483 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) [2021-07-13 20:13:18,341 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 166 transitions. [2021-07-13 20:13:18,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-07-13 20:13:18,342 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:13:18,342 INFO L508 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:13:18,557 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:13:18,557 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:13:18,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:13:18,558 INFO L82 PathProgramCache]: Analyzing trace with hash 276542775, now seen corresponding path program 25 times [2021-07-13 20:13:18,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:13:18,558 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440483977] [2021-07-13 20:13:18,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:13:18,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:13:18,668 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 120 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:18,668 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:13:18,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440483977] [2021-07-13 20:13:18,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440483977] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:18,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513716010] [2021-07-13 20:13:18,668 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:13:18,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:13:18,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-13 20:13:18,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:13:18,776 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 120 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:18,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513716010] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:18,776 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:13:18,776 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 17 [2021-07-13 20:13:18,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660489128] [2021-07-13 20:13:18,776 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:13:18,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:13:18,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:13:18,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:13:18,777 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) [2021-07-13 20:13:18,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:13:18,810 INFO L93 Difference]: Finished difference Result 583 states and 1109 transitions. [2021-07-13 20:13:18,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 20:13:18,810 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 [2021-07-13 20:13:18,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:13:18,811 INFO L225 Difference]: With dead ends: 583 [2021-07-13 20:13:18,811 INFO L226 Difference]: Without dead ends: 552 [2021-07-13 20:13:18,812 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 88.6ms TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:13:18,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2021-07-13 20:13:18,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 462. [2021-07-13 20:13:18,816 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) [2021-07-13 20:13:18,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 959 transitions. [2021-07-13 20:13:18,817 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 959 transitions. Word has length 38 [2021-07-13 20:13:18,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:13:18,817 INFO L482 AbstractCegarLoop]: Abstraction has 462 states and 959 transitions. [2021-07-13 20:13:18,817 INFO L483 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) [2021-07-13 20:13:18,817 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 959 transitions. [2021-07-13 20:13:18,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:13:18,818 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:13:18,818 INFO L508 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:13:19,032 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-07-13 20:13:19,033 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:13:19,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:13:19,033 INFO L82 PathProgramCache]: Analyzing trace with hash -817344894, now seen corresponding path program 26 times [2021-07-13 20:13:19,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:13:19,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819695944] [2021-07-13 20:13:19,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:13:19,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:13:19,513 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:19,513 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:13:19,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819695944] [2021-07-13 20:13:19,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819695944] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:19,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58036645] [2021-07-13 20:13:19,514 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:13:19,545 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:13:19,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:13:19,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 63 conjunts are in the unsatisfiable core [2021-07-13 20:13:19,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:13:19,609 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 [2021-07-13 20:13:19,609 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:13:19,611 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:13:19,611 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:13:19,611 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-07-13 20:13:19,616 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:19,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [58036645] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:19,616 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:13:19,616 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2021-07-13 20:13:19,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665067832] [2021-07-13 20:13:19,617 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-07-13 20:13:19,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:13:19,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-07-13 20:13:19,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=993, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 20:13:19,617 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) [2021-07-13 20:13:20,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:13:20,724 INFO L93 Difference]: Finished difference Result 949 states and 1857 transitions. [2021-07-13 20:13:20,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-13 20:13:20,724 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 [2021-07-13 20:13:20,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:13:20,726 INFO L225 Difference]: With dead ends: 949 [2021-07-13 20:13:20,726 INFO L226 Difference]: Without dead ends: 585 [2021-07-13 20:13:20,727 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 1237.2ms TimeCoverageRelationStatistics Valid=603, Invalid=3303, Unknown=0, NotChecked=0, Total=3906 [2021-07-13 20:13:20,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2021-07-13 20:13:20,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 91. [2021-07-13 20:13:20,729 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) [2021-07-13 20:13:20,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 176 transitions. [2021-07-13 20:13:20,730 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 176 transitions. Word has length 39 [2021-07-13 20:13:20,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:13:20,730 INFO L482 AbstractCegarLoop]: Abstraction has 91 states and 176 transitions. [2021-07-13 20:13:20,730 INFO L483 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) [2021-07-13 20:13:20,730 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 176 transitions. [2021-07-13 20:13:20,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 20:13:20,730 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:13:20,730 INFO L508 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:13:20,946 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-07-13 20:13:20,946 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:13:20,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:13:20,947 INFO L82 PathProgramCache]: Analyzing trace with hash 455182763, now seen corresponding path program 27 times [2021-07-13 20:13:20,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:13:20,947 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005435567] [2021-07-13 20:13:20,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:13:20,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:13:21,075 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 136 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:21,075 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:13:21,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005435567] [2021-07-13 20:13:21,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005435567] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:21,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936372646] [2021-07-13 20:13:21,075 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 [2021-07-13 20:13:21,110 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-07-13 20:13:21,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:13:21,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 20:13:21,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:13:21,182 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 136 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:21,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936372646] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:21,183 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:13:21,183 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 18 [2021-07-13 20:13:21,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803023627] [2021-07-13 20:13:21,183 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:13:21,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:13:21,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:13:21,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:13:21,183 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) [2021-07-13 20:13:21,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:13:21,219 INFO L93 Difference]: Finished difference Result 645 states and 1230 transitions. [2021-07-13 20:13:21,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 20:13:21,219 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 [2021-07-13 20:13:21,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:13:21,221 INFO L225 Difference]: With dead ends: 645 [2021-07-13 20:13:21,221 INFO L226 Difference]: Without dead ends: 612 [2021-07-13 20:13:21,222 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 107.2ms TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:13:21,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2021-07-13 20:13:21,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 516. [2021-07-13 20:13:21,227 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) [2021-07-13 20:13:21,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 516 states to 516 states and 1070 transitions. [2021-07-13 20:13:21,228 INFO L78 Accepts]: Start accepts. Automaton has 516 states and 1070 transitions. Word has length 40 [2021-07-13 20:13:21,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:13:21,228 INFO L482 AbstractCegarLoop]: Abstraction has 516 states and 1070 transitions. [2021-07-13 20:13:21,228 INFO L483 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) [2021-07-13 20:13:21,228 INFO L276 IsEmpty]: Start isEmpty. Operand 516 states and 1070 transitions. [2021-07-13 20:13:21,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-13 20:13:21,229 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:13:21,229 INFO L508 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:13:21,437 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-07-13 20:13:21,437 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:13:21,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:13:21,438 INFO L82 PathProgramCache]: Analyzing trace with hash 1496120374, now seen corresponding path program 28 times [2021-07-13 20:13:21,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:13:21,438 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52080658] [2021-07-13 20:13:21,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:13:21,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:13:21,929 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:21,929 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:13:21,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52080658] [2021-07-13 20:13:21,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52080658] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:21,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551561223] [2021-07-13 20:13:21,929 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 [2021-07-13 20:13:21,959 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:13:21,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:13:21,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 67 conjunts are in the unsatisfiable core [2021-07-13 20:13:21,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:13:22,030 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 [2021-07-13 20:13:22,031 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:13:22,032 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:13:22,032 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:13:22,032 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-07-13 20:13:22,037 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:22,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551561223] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:22,037 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:13:22,037 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2021-07-13 20:13:22,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932119595] [2021-07-13 20:13:22,038 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-07-13 20:13:22,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:13:22,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-07-13 20:13:22,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:13:22,038 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) [2021-07-13 20:13:23,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:13:23,305 INFO L93 Difference]: Finished difference Result 1059 states and 2075 transitions. [2021-07-13 20:13:23,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 20:13:23,305 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 [2021-07-13 20:13:23,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:13:23,307 INFO L225 Difference]: With dead ends: 1059 [2021-07-13 20:13:23,307 INFO L226 Difference]: Without dead ends: 655 [2021-07-13 20:13:23,308 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 1375.5ms TimeCoverageRelationStatistics Valid=675, Invalid=3747, Unknown=0, NotChecked=0, Total=4422 [2021-07-13 20:13:23,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2021-07-13 20:13:23,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 96. [2021-07-13 20:13:23,311 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) [2021-07-13 20:13:23,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 186 transitions. [2021-07-13 20:13:23,311 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 186 transitions. Word has length 41 [2021-07-13 20:13:23,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:13:23,311 INFO L482 AbstractCegarLoop]: Abstraction has 96 states and 186 transitions. [2021-07-13 20:13:23,311 INFO L483 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) [2021-07-13 20:13:23,311 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 186 transitions. [2021-07-13 20:13:23,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-07-13 20:13:23,311 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:13:23,311 INFO L508 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:13:23,527 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:13:23,528 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:13:23,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:13:23,528 INFO L82 PathProgramCache]: Analyzing trace with hash -841837961, now seen corresponding path program 29 times [2021-07-13 20:13:23,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:13:23,528 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217543847] [2021-07-13 20:13:23,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:13:23,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:13:23,673 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 153 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:23,673 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:13:23,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217543847] [2021-07-13 20:13:23,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217543847] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:23,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507073679] [2021-07-13 20:13:23,674 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 [2021-07-13 20:13:23,725 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-07-13 20:13:23,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:13:23,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:13:23,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:13:23,812 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 153 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:23,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [507073679] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:23,813 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:13:23,813 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 19 [2021-07-13 20:13:23,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012342563] [2021-07-13 20:13:23,813 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:13:23,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:13:23,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:13:23,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:13:23,813 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) [2021-07-13 20:13:23,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:13:23,851 INFO L93 Difference]: Finished difference Result 710 states and 1357 transitions. [2021-07-13 20:13:23,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 20:13:23,851 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 [2021-07-13 20:13:23,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:13:23,854 INFO L225 Difference]: With dead ends: 710 [2021-07-13 20:13:23,854 INFO L226 Difference]: Without dead ends: 675 [2021-07-13 20:13:23,855 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 121.0ms TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:13:23,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 675 states. [2021-07-13 20:13:23,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 675 to 573. [2021-07-13 20:13:23,860 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) [2021-07-13 20:13:23,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 573 states to 573 states and 1187 transitions. [2021-07-13 20:13:23,861 INFO L78 Accepts]: Start accepts. Automaton has 573 states and 1187 transitions. Word has length 42 [2021-07-13 20:13:23,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:13:23,861 INFO L482 AbstractCegarLoop]: Abstraction has 573 states and 1187 transitions. [2021-07-13 20:13:23,861 INFO L483 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) [2021-07-13 20:13:23,861 INFO L276 IsEmpty]: Start isEmpty. Operand 573 states and 1187 transitions. [2021-07-13 20:13:23,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:13:23,862 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:13:23,862 INFO L508 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:13:24,078 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-07-13 20:13:24,078 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:13:24,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:13:24,079 INFO L82 PathProgramCache]: Analyzing trace with hash -1228173758, now seen corresponding path program 30 times [2021-07-13 20:13:24,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:13:24,079 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002264218] [2021-07-13 20:13:24,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:13:24,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:13:24,613 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:24,613 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:13:24,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002264218] [2021-07-13 20:13:24,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002264218] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:24,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868240382] [2021-07-13 20:13:24,613 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 [2021-07-13 20:13:24,647 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-07-13 20:13:24,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:13:24,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 40 conjunts are in the unsatisfiable core [2021-07-13 20:13:24,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:13:26,169 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:13:26,169 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 [2021-07-13 20:13:26,170 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:13:26,173 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:13:26,174 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:13:26,174 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:19, output treesize:3 [2021-07-13 20:13:26,178 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 136 proven. 170 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:26,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868240382] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:26,178 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:13:26,178 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 70 [2021-07-13 20:13:26,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791311885] [2021-07-13 20:13:26,179 INFO L462 AbstractCegarLoop]: Interpolant automaton has 71 states [2021-07-13 20:13:26,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:13:26,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-07-13 20:13:26,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=700, Invalid=4270, Unknown=0, NotChecked=0, Total=4970 [2021-07-13 20:13:26,180 INFO L87 Difference]: Start difference. First operand 573 states and 1187 transitions. Second operand has 71 states, 71 states have (on average 1.1408450704225352) internal successors, (81), 70 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) [2021-07-13 20:13:39,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:13:39,972 INFO L93 Difference]: Finished difference Result 5479 states and 10739 transitions. [2021-07-13 20:13:39,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 225 states. [2021-07-13 20:13:39,973 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 1.1408450704225352) internal successors, (81), 70 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 43 [2021-07-13 20:13:39,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:13:39,983 INFO L225 Difference]: With dead ends: 5479 [2021-07-13 20:13:39,983 INFO L226 Difference]: Without dead ends: 3672 [2021-07-13 20:13:39,986 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 274 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23730 ImplicationChecksByTransitivity, 14162.7ms TimeCoverageRelationStatistics Valid=13164, Invalid=62736, Unknown=0, NotChecked=0, Total=75900 [2021-07-13 20:13:39,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3672 states. [2021-07-13 20:13:40,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3672 to 595. [2021-07-13 20:13:40,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 595 states, 594 states have (on average 2.0757575757575757) internal successors, (1233), 594 states have internal predecessors, (1233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:40,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 595 states to 595 states and 1233 transitions. [2021-07-13 20:13:40,005 INFO L78 Accepts]: Start accepts. Automaton has 595 states and 1233 transitions. Word has length 43 [2021-07-13 20:13:40,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:13:40,005 INFO L482 AbstractCegarLoop]: Abstraction has 595 states and 1233 transitions. [2021-07-13 20:13:40,005 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 71 states, 71 states have (on average 1.1408450704225352) internal successors, (81), 70 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) [2021-07-13 20:13:40,005 INFO L276 IsEmpty]: Start isEmpty. Operand 595 states and 1233 transitions. [2021-07-13 20:13:40,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-07-13 20:13:40,006 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:13:40,006 INFO L508 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:13:40,220 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:13:40,221 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:13:40,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:13:40,221 INFO L82 PathProgramCache]: Analyzing trace with hash -1297123594, now seen corresponding path program 31 times [2021-07-13 20:13:40,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:13:40,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030201510] [2021-07-13 20:13:40,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:13:40,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:13:40,850 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:40,850 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:13:40,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030201510] [2021-07-13 20:13:40,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030201510] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:40,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000792540] [2021-07-13 20:13:40,850 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 [2021-07-13 20:13:40,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:13:40,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 75 conjunts are in the unsatisfiable core [2021-07-13 20:13:40,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:13:40,957 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 [2021-07-13 20:13:40,958 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:13:40,959 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:13:40,959 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:13:40,959 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-07-13 20:13:40,964 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:40,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000792540] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:40,964 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:13:40,964 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2021-07-13 20:13:40,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712729326] [2021-07-13 20:13:40,964 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-13 20:13:40,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:13:40,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-13 20:13:40,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=1407, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:13:40,965 INFO L87 Difference]: Start difference. First operand 595 states and 1233 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) [2021-07-13 20:13:42,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:13:42,608 INFO L93 Difference]: Finished difference Result 1255 states and 2466 transitions. [2021-07-13 20:13:42,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-13 20:13:42,608 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 [2021-07-13 20:13:42,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:13:42,610 INFO L225 Difference]: With dead ends: 1255 [2021-07-13 20:13:42,611 INFO L226 Difference]: Without dead ends: 805 [2021-07-13 20:13:42,611 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 1786.9ms TimeCoverageRelationStatistics Valid=831, Invalid=4719, Unknown=0, NotChecked=0, Total=5550 [2021-07-13 20:13:42,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 805 states. [2021-07-13 20:13:42,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 805 to 106. [2021-07-13 20:13:42,614 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) [2021-07-13 20:13:42,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 206 transitions. [2021-07-13 20:13:42,615 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 206 transitions. Word has length 45 [2021-07-13 20:13:42,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:13:42,615 INFO L482 AbstractCegarLoop]: Abstraction has 106 states and 206 transitions. [2021-07-13 20:13:42,615 INFO L483 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) [2021-07-13 20:13:42,615 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 206 transitions. [2021-07-13 20:13:42,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-07-13 20:13:42,616 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:13:42,616 INFO L508 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:13:42,820 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-07-13 20:13:42,820 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:13:42,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:13:42,820 INFO L82 PathProgramCache]: Analyzing trace with hash -1533055049, now seen corresponding path program 32 times [2021-07-13 20:13:42,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:13:42,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325603027] [2021-07-13 20:13:42,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:13:42,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:13:42,979 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 190 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:42,979 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:13:42,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325603027] [2021-07-13 20:13:42,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325603027] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:42,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384265866] [2021-07-13 20:13:42,979 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 [2021-07-13 20:13:43,014 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:13:43,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:13:43,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 38 conjunts are in the unsatisfiable core [2021-07-13 20:13:43,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:13:43,089 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 190 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:43,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [384265866] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:43,090 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:13:43,090 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 21 [2021-07-13 20:13:43,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128683949] [2021-07-13 20:13:43,091 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 20:13:43,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:13:43,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 20:13:43,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:13:43,091 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) [2021-07-13 20:13:43,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:13:43,134 INFO L93 Difference]: Finished difference Result 849 states and 1629 transitions. [2021-07-13 20:13:43,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 20:13:43,134 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 [2021-07-13 20:13:43,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:13:43,136 INFO L225 Difference]: With dead ends: 849 [2021-07-13 20:13:43,136 INFO L226 Difference]: Without dead ends: 810 [2021-07-13 20:13:43,137 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 135.0ms TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:13:43,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 810 states. [2021-07-13 20:13:43,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 810 to 696. [2021-07-13 20:13:43,143 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) [2021-07-13 20:13:43,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 696 states to 696 states and 1439 transitions. [2021-07-13 20:13:43,144 INFO L78 Accepts]: Start accepts. Automaton has 696 states and 1439 transitions. Word has length 46 [2021-07-13 20:13:43,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:13:43,144 INFO L482 AbstractCegarLoop]: Abstraction has 696 states and 1439 transitions. [2021-07-13 20:13:43,144 INFO L483 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) [2021-07-13 20:13:43,144 INFO L276 IsEmpty]: Start isEmpty. Operand 696 states and 1439 transitions. [2021-07-13 20:13:43,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 20:13:43,145 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:13:43,145 INFO L508 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:13:43,361 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-07-13 20:13:43,361 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:13:43,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:13:43,361 INFO L82 PathProgramCache]: Analyzing trace with hash 768577026, now seen corresponding path program 33 times [2021-07-13 20:13:43,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:13:43,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369108732] [2021-07-13 20:13:43,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:13:43,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:13:44,015 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:44,016 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:13:44,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369108732] [2021-07-13 20:13:44,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369108732] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:44,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051097049] [2021-07-13 20:13:44,016 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 [2021-07-13 20:13:44,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-07-13 20:13:44,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:13:44,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 79 conjunts are in the unsatisfiable core [2021-07-13 20:13:44,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:13:44,146 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 [2021-07-13 20:13:44,147 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:13:44,148 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:13:44,148 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:13:44,148 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-07-13 20:13:44,152 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:44,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051097049] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:44,152 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:13:44,152 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2021-07-13 20:13:44,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824969412] [2021-07-13 20:13:44,153 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-07-13 20:13:44,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:13:44,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-07-13 20:13:44,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1561, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 20:13:44,153 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) [2021-07-13 20:13:45,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:13:45,990 INFO L93 Difference]: Finished difference Result 1425 states and 2801 transitions. [2021-07-13 20:13:45,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-13 20:13:45,990 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 [2021-07-13 20:13:45,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:13:45,993 INFO L225 Difference]: With dead ends: 1425 [2021-07-13 20:13:45,993 INFO L226 Difference]: Without dead ends: 889 [2021-07-13 20:13:45,993 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 1991.3ms TimeCoverageRelationStatistics Valid=915, Invalid=5247, Unknown=0, NotChecked=0, Total=6162 [2021-07-13 20:13:45,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 889 states. [2021-07-13 20:13:45,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 889 to 111. [2021-07-13 20:13:45,996 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) [2021-07-13 20:13:45,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 216 transitions. [2021-07-13 20:13:45,996 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 216 transitions. Word has length 47 [2021-07-13 20:13:45,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:13:45,996 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 216 transitions. [2021-07-13 20:13:45,997 INFO L483 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) [2021-07-13 20:13:45,997 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 216 transitions. [2021-07-13 20:13:45,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-13 20:13:45,997 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:13:45,997 INFO L508 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:13:46,198 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-07-13 20:13:46,198 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:13:46,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:13:46,198 INFO L82 PathProgramCache]: Analyzing trace with hash -1920845269, now seen corresponding path program 34 times [2021-07-13 20:13:46,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:13:46,199 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755247031] [2021-07-13 20:13:46,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:13:46,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:13:46,378 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 210 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:46,378 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:13:46,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755247031] [2021-07-13 20:13:46,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755247031] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:46,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028604463] [2021-07-13 20:13:46,379 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 [2021-07-13 20:13:46,411 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:13:46,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:13:46,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 40 conjunts are in the unsatisfiable core [2021-07-13 20:13:46,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:13:46,504 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 210 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:46,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028604463] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:46,504 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:13:46,504 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 22 [2021-07-13 20:13:46,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224935879] [2021-07-13 20:13:46,505 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:13:46,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:13:46,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:13:46,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:13:46,505 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) [2021-07-13 20:13:46,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:13:46,551 INFO L93 Difference]: Finished difference Result 923 states and 1774 transitions. [2021-07-13 20:13:46,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 20:13:46,552 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 [2021-07-13 20:13:46,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:13:46,554 INFO L225 Difference]: With dead ends: 923 [2021-07-13 20:13:46,554 INFO L226 Difference]: Without dead ends: 882 [2021-07-13 20:13:46,554 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 155.1ms TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:13:46,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 882 states. [2021-07-13 20:13:46,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 882 to 762. [2021-07-13 20:13:46,561 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) [2021-07-13 20:13:46,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 762 states to 762 states and 1574 transitions. [2021-07-13 20:13:46,562 INFO L78 Accepts]: Start accepts. Automaton has 762 states and 1574 transitions. Word has length 48 [2021-07-13 20:13:46,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:13:46,563 INFO L482 AbstractCegarLoop]: Abstraction has 762 states and 1574 transitions. [2021-07-13 20:13:46,563 INFO L483 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) [2021-07-13 20:13:46,563 INFO L276 IsEmpty]: Start isEmpty. Operand 762 states and 1574 transitions. [2021-07-13 20:13:46,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-07-13 20:13:46,564 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:13:46,564 INFO L508 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:13:46,776 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-07-13 20:13:46,777 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:13:46,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:13:46,777 INFO L82 PathProgramCache]: Analyzing trace with hash -1960578634, now seen corresponding path program 35 times [2021-07-13 20:13:46,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:13:46,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238063246] [2021-07-13 20:13:46,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:13:46,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:13:47,488 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:47,489 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:13:47,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238063246] [2021-07-13 20:13:47,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238063246] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:47,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396358189] [2021-07-13 20:13:47,489 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 [2021-07-13 20:13:47,529 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-07-13 20:13:47,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:13:47,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-13 20:13:47,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:13:49,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:13:49,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 20:13:49,552 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:13:49,556 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:13:49,557 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:13:49,557 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:19, output treesize:3 [2021-07-13 20:13:49,562 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 190 proven. 230 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:49,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396358189] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:49,562 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:13:49,562 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 82 [2021-07-13 20:13:49,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223932823] [2021-07-13 20:13:49,563 INFO L462 AbstractCegarLoop]: Interpolant automaton has 83 states [2021-07-13 20:13:49,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:13:49,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2021-07-13 20:13:49,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=943, Invalid=5863, Unknown=0, NotChecked=0, Total=6806 [2021-07-13 20:13:49,564 INFO L87 Difference]: Start difference. First operand 762 states and 1574 transitions. Second operand has 83 states, 83 states have (on average 1.1204819277108433) internal successors, (93), 82 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:12,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:14:12,511 INFO L93 Difference]: Finished difference Result 8032 states and 15779 transitions. [2021-07-13 20:14:12,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 294 states. [2021-07-13 20:14:12,511 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 1.1204819277108433) internal successors, (93), 82 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have 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 [2021-07-13 20:14:12,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:14:12,527 INFO L225 Difference]: With dead ends: 8032 [2021-07-13 20:14:12,527 INFO L226 Difference]: Without dead ends: 5607 [2021-07-13 20:14:12,531 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 352 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41000 ImplicationChecksByTransitivity, 23317.3ms TimeCoverageRelationStatistics Valid=21491, Invalid=103471, Unknown=0, NotChecked=0, Total=124962 [2021-07-13 20:14:12,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5607 states. [2021-07-13 20:14:12,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5607 to 787. [2021-07-13 20:14:12,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 787 states, 786 states have (on average 2.068702290076336) internal successors, (1626), 786 states have internal predecessors, (1626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:12,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 787 states to 787 states and 1626 transitions. [2021-07-13 20:14:12,559 INFO L78 Accepts]: Start accepts. Automaton has 787 states and 1626 transitions. Word has length 49 [2021-07-13 20:14:12,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:14:12,559 INFO L482 AbstractCegarLoop]: Abstraction has 787 states and 1626 transitions. [2021-07-13 20:14:12,559 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 83 states, 83 states have (on average 1.1204819277108433) internal successors, (93), 82 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:12,559 INFO L276 IsEmpty]: Start isEmpty. Operand 787 states and 1626 transitions. [2021-07-13 20:14:12,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-07-13 20:14:12,560 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:14:12,560 INFO L508 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:14:12,766 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-07-13 20:14:12,766 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:14:12,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:14:12,766 INFO L82 PathProgramCache]: Analyzing trace with hash -154382910, now seen corresponding path program 36 times [2021-07-13 20:14:12,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:14:12,766 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165744587] [2021-07-13 20:14:12,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:14:12,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:14:13,539 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:14:13,539 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:14:13,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165744587] [2021-07-13 20:14:13,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165744587] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:13,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20935426] [2021-07-13 20:14:13,539 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:14:13,580 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-07-13 20:14:13,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:14:13,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 87 conjunts are in the unsatisfiable core [2021-07-13 20:14:13,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:14:13,670 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 [2021-07-13 20:14:13,671 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:14:13,672 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:14:13,672 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:14:13,672 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-07-13 20:14:13,677 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:14:13,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20935426] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:13,677 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:14:13,677 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2021-07-13 20:14:13,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268760234] [2021-07-13 20:14:13,677 INFO L462 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-07-13 20:14:13,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:14:13,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-07-13 20:14:13,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1893, Unknown=0, NotChecked=0, Total=1980 [2021-07-13 20:14:13,678 INFO L87 Difference]: Start difference. First operand 787 states and 1626 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) [2021-07-13 20:14:16,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:14:16,041 INFO L93 Difference]: Finished difference Result 1651 states and 3252 transitions. [2021-07-13 20:14:16,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-07-13 20:14:16,041 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 [2021-07-13 20:14:16,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:14:16,044 INFO L225 Difference]: With dead ends: 1651 [2021-07-13 20:14:16,044 INFO L226 Difference]: Without dead ends: 1063 [2021-07-13 20:14:16,044 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 861 ImplicationChecksByTransitivity, 2490.0ms TimeCoverageRelationStatistics Valid=1095, Invalid=6387, Unknown=0, NotChecked=0, Total=7482 [2021-07-13 20:14:16,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1063 states. [2021-07-13 20:14:16,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1063 to 121. [2021-07-13 20:14:16,050 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) [2021-07-13 20:14:16,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 236 transitions. [2021-07-13 20:14:16,050 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 236 transitions. Word has length 51 [2021-07-13 20:14:16,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:14:16,050 INFO L482 AbstractCegarLoop]: Abstraction has 121 states and 236 transitions. [2021-07-13 20:14:16,050 INFO L483 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) [2021-07-13 20:14:16,050 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 236 transitions. [2021-07-13 20:14:16,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-07-13 20:14:16,051 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:14:16,051 INFO L508 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:14:16,256 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-07-13 20:14:16,257 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:14:16,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:14:16,257 INFO L82 PathProgramCache]: Analyzing trace with hash -467832213, now seen corresponding path program 37 times [2021-07-13 20:14:16,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:14:16,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384494412] [2021-07-13 20:14:16,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:14:16,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:14:16,480 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 253 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:14:16,480 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:14:16,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384494412] [2021-07-13 20:14:16,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384494412] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:16,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587372119] [2021-07-13 20:14:16,480 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 [2021-07-13 20:14:16,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:14:16,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 44 conjunts are in the unsatisfiable core [2021-07-13 20:14:16,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:14:16,611 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 253 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:14:16,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1587372119] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:16,611 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:14:16,611 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 24 [2021-07-13 20:14:16,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258700857] [2021-07-13 20:14:16,611 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 20:14:16,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:14:16,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 20:14:16,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:14:16,612 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) [2021-07-13 20:14:16,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:14:16,670 INFO L93 Difference]: Finished difference Result 1080 states and 2082 transitions. [2021-07-13 20:14:16,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 20:14:16,670 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 [2021-07-13 20:14:16,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:14:16,672 INFO L225 Difference]: With dead ends: 1080 [2021-07-13 20:14:16,672 INFO L226 Difference]: Without dead ends: 1035 [2021-07-13 20:14:16,672 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 196.2ms TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:14:16,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1035 states. [2021-07-13 20:14:16,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1035 to 903. [2021-07-13 20:14:16,681 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) [2021-07-13 20:14:16,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 903 states to 903 states and 1862 transitions. [2021-07-13 20:14:16,682 INFO L78 Accepts]: Start accepts. Automaton has 903 states and 1862 transitions. Word has length 52 [2021-07-13 20:14:16,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:14:16,682 INFO L482 AbstractCegarLoop]: Abstraction has 903 states and 1862 transitions. [2021-07-13 20:14:16,682 INFO L483 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) [2021-07-13 20:14:16,683 INFO L276 IsEmpty]: Start isEmpty. Operand 903 states and 1862 transitions. [2021-07-13 20:14:16,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-13 20:14:16,684 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:14:16,684 INFO L508 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:14:16,900 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-07-13 20:14:16,900 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:14:16,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:14:16,900 INFO L82 PathProgramCache]: Analyzing trace with hash 1135766646, now seen corresponding path program 38 times [2021-07-13 20:14:16,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:14:16,900 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428230394] [2021-07-13 20:14:16,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:14:16,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:14:17,814 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:14:17,815 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:14:17,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428230394] [2021-07-13 20:14:17,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428230394] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:17,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373012175] [2021-07-13 20:14:17,815 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 [2021-07-13 20:14:17,855 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:14:17,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:14:17,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 91 conjunts are in the unsatisfiable core [2021-07-13 20:14:17,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:14:17,952 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 [2021-07-13 20:14:17,953 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:14:17,954 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:14:17,954 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:14:17,954 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-07-13 20:14:17,959 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:14:17,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1373012175] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:17,959 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:14:17,959 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2021-07-13 20:14:17,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855278326] [2021-07-13 20:14:17,959 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-07-13 20:14:17,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:14:17,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-07-13 20:14:17,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=2071, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 20:14:17,960 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) [2021-07-13 20:14:20,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:14:20,718 INFO L93 Difference]: Finished difference Result 1845 states and 3635 transitions. [2021-07-13 20:14:20,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-07-13 20:14:20,718 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 [2021-07-13 20:14:20,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:14:20,720 INFO L225 Difference]: With dead ends: 1845 [2021-07-13 20:14:20,720 INFO L226 Difference]: Without dead ends: 1159 [2021-07-13 20:14:20,720 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 946 ImplicationChecksByTransitivity, 2925.4ms TimeCoverageRelationStatistics Valid=1191, Invalid=6999, Unknown=0, NotChecked=0, Total=8190 [2021-07-13 20:14:20,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1159 states. [2021-07-13 20:14:20,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1159 to 126. [2021-07-13 20:14:20,724 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) [2021-07-13 20:14:20,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 246 transitions. [2021-07-13 20:14:20,725 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 246 transitions. Word has length 53 [2021-07-13 20:14:20,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:14:20,725 INFO L482 AbstractCegarLoop]: Abstraction has 126 states and 246 transitions. [2021-07-13 20:14:20,725 INFO L483 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) [2021-07-13 20:14:20,725 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 246 transitions. [2021-07-13 20:14:20,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-13 20:14:20,725 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:14:20,725 INFO L508 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:14:20,941 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-07-13 20:14:20,942 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:14:20,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:14:20,942 INFO L82 PathProgramCache]: Analyzing trace with hash 872098359, now seen corresponding path program 39 times [2021-07-13 20:14:20,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:14:20,942 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909573184] [2021-07-13 20:14:20,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:14:20,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:14:21,194 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 276 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:14:21,194 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:14:21,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909573184] [2021-07-13 20:14:21,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909573184] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:21,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199715118] [2021-07-13 20:14:21,195 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 [2021-07-13 20:14:21,359 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-07-13 20:14:21,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:14:21,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-13 20:14:21,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:14:21,454 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 276 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:14:21,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199715118] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:21,454 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:14:21,454 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24] total 25 [2021-07-13 20:14:21,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338652811] [2021-07-13 20:14:21,455 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 20:14:21,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:14:21,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 20:14:21,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:14:21,455 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) [2021-07-13 20:14:21,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:14:21,522 INFO L93 Difference]: Finished difference Result 1163 states and 2245 transitions. [2021-07-13 20:14:21,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 20:14:21,523 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 [2021-07-13 20:14:21,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:14:21,525 INFO L225 Difference]: With dead ends: 1163 [2021-07-13 20:14:21,525 INFO L226 Difference]: Without dead ends: 1116 [2021-07-13 20:14:21,525 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 218.0ms TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:14:21,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1116 states. [2021-07-13 20:14:21,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1116 to 978. [2021-07-13 20:14:21,545 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) [2021-07-13 20:14:21,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 978 states to 978 states and 2015 transitions. [2021-07-13 20:14:21,546 INFO L78 Accepts]: Start accepts. Automaton has 978 states and 2015 transitions. Word has length 54 [2021-07-13 20:14:21,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:14:21,546 INFO L482 AbstractCegarLoop]: Abstraction has 978 states and 2015 transitions. [2021-07-13 20:14:21,546 INFO L483 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) [2021-07-13 20:14:21,546 INFO L276 IsEmpty]: Start isEmpty. Operand 978 states and 2015 transitions. [2021-07-13 20:14:21,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-07-13 20:14:21,547 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:14:21,547 INFO L508 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:14:21,764 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:14:21,764 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:14:21,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:14:21,764 INFO L82 PathProgramCache]: Analyzing trace with hash 37342594, now seen corresponding path program 40 times [2021-07-13 20:14:21,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:14:21,764 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964731608] [2021-07-13 20:14:21,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:14:21,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:14:22,765 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:14:22,765 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:14:22,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964731608] [2021-07-13 20:14:22,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964731608] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:22,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273564535] [2021-07-13 20:14:22,765 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 [2021-07-13 20:14:22,805 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:14:22,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:14:22,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 95 conjunts are in the unsatisfiable core [2021-07-13 20:14:22,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:14:22,897 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 [2021-07-13 20:14:22,898 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:14:22,899 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:14:22,899 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:14:22,899 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-07-13 20:14:22,904 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:14:22,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273564535] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:22,904 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:14:22,904 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2021-07-13 20:14:22,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314306927] [2021-07-13 20:14:22,904 INFO L462 AbstractCegarLoop]: Interpolant automaton has 49 states [2021-07-13 20:14:22,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:14:22,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-07-13 20:14:22,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=2257, Unknown=0, NotChecked=0, Total=2352 [2021-07-13 20:14:22,905 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) [2021-07-13 20:14:25,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:14:25,926 INFO L93 Difference]: Finished difference Result 1997 states and 3937 transitions. [2021-07-13 20:14:25,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-07-13 20:14:25,926 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 [2021-07-13 20:14:25,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:14:25,928 INFO L225 Difference]: With dead ends: 1997 [2021-07-13 20:14:25,928 INFO L226 Difference]: Without dead ends: 1257 [2021-07-13 20:14:25,928 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1035 ImplicationChecksByTransitivity, 3196.7ms TimeCoverageRelationStatistics Valid=1291, Invalid=7639, Unknown=0, NotChecked=0, Total=8930 [2021-07-13 20:14:25,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1257 states. [2021-07-13 20:14:25,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1257 to 131. [2021-07-13 20:14:25,933 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) [2021-07-13 20:14:25,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 256 transitions. [2021-07-13 20:14:25,933 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 256 transitions. Word has length 55 [2021-07-13 20:14:25,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:14:25,933 INFO L482 AbstractCegarLoop]: Abstraction has 131 states and 256 transitions. [2021-07-13 20:14:25,933 INFO L483 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) [2021-07-13 20:14:25,933 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 256 transitions. [2021-07-13 20:14:25,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-07-13 20:14:25,934 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:14:25,934 INFO L508 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:14:26,150 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:14:26,150 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:14:26,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:14:26,150 INFO L82 PathProgramCache]: Analyzing trace with hash 1180691115, now seen corresponding path program 41 times [2021-07-13 20:14:26,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:14:26,150 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807519985] [2021-07-13 20:14:26,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:14:26,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:14:26,417 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 300 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:14:26,417 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:14:26,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807519985] [2021-07-13 20:14:26,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807519985] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:26,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117291330] [2021-07-13 20:14:26,417 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 [2021-07-13 20:14:26,470 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-07-13 20:14:26,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:14:26,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 48 conjunts are in the unsatisfiable core [2021-07-13 20:14:26,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:14:26,591 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 300 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:14:26,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117291330] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:26,591 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:14:26,591 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 26 [2021-07-13 20:14:26,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684441184] [2021-07-13 20:14:26,591 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:14:26,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:14:26,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:14:26,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:14:26,592 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) [2021-07-13 20:14:26,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:14:26,649 INFO L93 Difference]: Finished difference Result 1249 states and 2414 transitions. [2021-07-13 20:14:26,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 20:14:26,650 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 [2021-07-13 20:14:26,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:14:26,651 INFO L225 Difference]: With dead ends: 1249 [2021-07-13 20:14:26,651 INFO L226 Difference]: Without dead ends: 1200 [2021-07-13 20:14:26,651 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 236.2ms TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:14:26,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1200 states. [2021-07-13 20:14:26,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1200 to 1056. [2021-07-13 20:14:26,662 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) [2021-07-13 20:14:26,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1056 states to 1056 states and 2174 transitions. [2021-07-13 20:14:26,664 INFO L78 Accepts]: Start accepts. Automaton has 1056 states and 2174 transitions. Word has length 56 [2021-07-13 20:14:26,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:14:26,665 INFO L482 AbstractCegarLoop]: Abstraction has 1056 states and 2174 transitions. [2021-07-13 20:14:26,665 INFO L483 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) [2021-07-13 20:14:26,665 INFO L276 IsEmpty]: Start isEmpty. Operand 1056 states and 2174 transitions. [2021-07-13 20:14:26,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-07-13 20:14:26,666 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:14:26,666 INFO L508 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:14:26,874 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-07-13 20:14:26,875 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:14:26,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:14:26,875 INFO L82 PathProgramCache]: Analyzing trace with hash 2139285302, now seen corresponding path program 42 times [2021-07-13 20:14:26,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:14:26,875 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923690139] [2021-07-13 20:14:26,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:14:26,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:14:27,865 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:14:27,865 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:14:27,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923690139] [2021-07-13 20:14:27,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923690139] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:27,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217414301] [2021-07-13 20:14:27,865 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 [2021-07-13 20:14:27,909 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-07-13 20:14:27,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:14:27,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 99 conjunts are in the unsatisfiable core [2021-07-13 20:14:27,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:14:28,027 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 [2021-07-13 20:14:28,028 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:14:28,029 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:14:28,030 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:14:28,030 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-07-13 20:14:28,034 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:14:28,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [217414301] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:28,035 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:14:28,035 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2021-07-13 20:14:28,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526558242] [2021-07-13 20:14:28,035 INFO L462 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-07-13 20:14:28,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:14:28,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-07-13 20:14:28,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=2451, Unknown=0, NotChecked=0, Total=2550 [2021-07-13 20:14:28,036 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) [2021-07-13 20:14:31,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:14:31,018 INFO L93 Difference]: Finished difference Result 2155 states and 4251 transitions. [2021-07-13 20:14:31,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-07-13 20:14:31,018 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 [2021-07-13 20:14:31,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:14:31,020 INFO L225 Difference]: With dead ends: 2155 [2021-07-13 20:14:31,020 INFO L226 Difference]: Without dead ends: 1359 [2021-07-13 20:14:31,020 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1128 ImplicationChecksByTransitivity, 3215.3ms TimeCoverageRelationStatistics Valid=1395, Invalid=8307, Unknown=0, NotChecked=0, Total=9702 [2021-07-13 20:14:31,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1359 states. [2021-07-13 20:14:31,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1359 to 136. [2021-07-13 20:14:31,025 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) [2021-07-13 20:14:31,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 266 transitions. [2021-07-13 20:14:31,025 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 266 transitions. Word has length 57 [2021-07-13 20:14:31,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:14:31,025 INFO L482 AbstractCegarLoop]: Abstraction has 136 states and 266 transitions. [2021-07-13 20:14:31,025 INFO L483 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) [2021-07-13 20:14:31,025 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 266 transitions. [2021-07-13 20:14:31,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-07-13 20:14:31,025 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:14:31,025 INFO L508 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:14:31,241 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:14:31,241 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:14:31,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:14:31,241 INFO L82 PathProgramCache]: Analyzing trace with hash 1916405623, now seen corresponding path program 43 times [2021-07-13 20:14:31,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:14:31,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729772189] [2021-07-13 20:14:31,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:14:31,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:14:31,517 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 325 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:14:31,517 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:14:31,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729772189] [2021-07-13 20:14:31,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729772189] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:31,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566279189] [2021-07-13 20:14:31,517 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 [2021-07-13 20:14:31,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:14:31,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 50 conjunts are in the unsatisfiable core [2021-07-13 20:14:31,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:14:31,660 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 325 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:14:31,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566279189] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:31,661 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:14:31,661 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 27 [2021-07-13 20:14:31,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215767490] [2021-07-13 20:14:31,661 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 20:14:31,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:14:31,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 20:14:31,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:14:31,661 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) [2021-07-13 20:14:31,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:14:31,725 INFO L93 Difference]: Finished difference Result 1338 states and 2589 transitions. [2021-07-13 20:14:31,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 20:14:31,725 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 [2021-07-13 20:14:31,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:14:31,727 INFO L225 Difference]: With dead ends: 1338 [2021-07-13 20:14:31,727 INFO L226 Difference]: Without dead ends: 1287 [2021-07-13 20:14:31,727 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 247.8ms TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:14:31,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1287 states. [2021-07-13 20:14:31,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1287 to 1137. [2021-07-13 20:14:31,736 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) [2021-07-13 20:14:31,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1137 states to 1137 states and 2339 transitions. [2021-07-13 20:14:31,737 INFO L78 Accepts]: Start accepts. Automaton has 1137 states and 2339 transitions. Word has length 58 [2021-07-13 20:14:31,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:14:31,738 INFO L482 AbstractCegarLoop]: Abstraction has 1137 states and 2339 transitions. [2021-07-13 20:14:31,738 INFO L483 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) [2021-07-13 20:14:31,738 INFO L276 IsEmpty]: Start isEmpty. Operand 1137 states and 2339 transitions. [2021-07-13 20:14:31,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 20:14:31,739 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:14:31,739 INFO L508 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:14:31,951 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:14:31,952 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:14:31,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:14:31,952 INFO L82 PathProgramCache]: Analyzing trace with hash -292549310, now seen corresponding path program 44 times [2021-07-13 20:14:31,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:14:31,952 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884607684] [2021-07-13 20:14:31,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:14:31,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:14:32,991 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:14:32,991 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:14:32,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884607684] [2021-07-13 20:14:32,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884607684] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:32,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713574003] [2021-07-13 20:14:32,992 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 [2021-07-13 20:14:33,029 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:14:33,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:14:33,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 103 conjunts are in the unsatisfiable core [2021-07-13 20:14:33,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:14:33,133 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 [2021-07-13 20:14:33,133 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:14:33,134 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:14:33,134 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:14:33,135 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-07-13 20:14:33,139 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:14:33,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713574003] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:33,139 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:14:33,139 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2021-07-13 20:14:33,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744482522] [2021-07-13 20:14:33,139 INFO L462 AbstractCegarLoop]: Interpolant automaton has 53 states [2021-07-13 20:14:33,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:14:33,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-07-13 20:14:33,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=2653, Unknown=0, NotChecked=0, Total=2756 [2021-07-13 20:14:33,140 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) [2021-07-13 20:14:36,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:14:36,403 INFO L93 Difference]: Finished difference Result 2319 states and 4577 transitions. [2021-07-13 20:14:36,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-07-13 20:14:36,404 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 [2021-07-13 20:14:36,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:14:36,406 INFO L225 Difference]: With dead ends: 2319 [2021-07-13 20:14:36,406 INFO L226 Difference]: Without dead ends: 1465 [2021-07-13 20:14:36,406 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1225 ImplicationChecksByTransitivity, 3477.7ms TimeCoverageRelationStatistics Valid=1503, Invalid=9003, Unknown=0, NotChecked=0, Total=10506 [2021-07-13 20:14:36,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1465 states. [2021-07-13 20:14:36,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1465 to 141. [2021-07-13 20:14:36,411 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) [2021-07-13 20:14:36,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 276 transitions. [2021-07-13 20:14:36,412 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 276 transitions. Word has length 59 [2021-07-13 20:14:36,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:14:36,412 INFO L482 AbstractCegarLoop]: Abstraction has 141 states and 276 transitions. [2021-07-13 20:14:36,412 INFO L483 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) [2021-07-13 20:14:36,412 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 276 transitions. [2021-07-13 20:14:36,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-07-13 20:14:36,412 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:14:36,412 INFO L508 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:14:36,628 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-07-13 20:14:36,628 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:14:36,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:14:36,629 INFO L82 PathProgramCache]: Analyzing trace with hash -456023317, now seen corresponding path program 45 times [2021-07-13 20:14:36,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:14:36,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990195418] [2021-07-13 20:14:36,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:14:36,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:14:36,907 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 351 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:14:36,908 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:14:36,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990195418] [2021-07-13 20:14:36,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990195418] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:36,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790398653] [2021-07-13 20:14:36,908 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 [2021-07-13 20:14:36,951 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-07-13 20:14:36,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:14:36,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 52 conjunts are in the unsatisfiable core [2021-07-13 20:14:36,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:14:37,060 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 351 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:14:37,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790398653] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:37,060 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:14:37,060 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 28 [2021-07-13 20:14:37,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600262679] [2021-07-13 20:14:37,060 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-13 20:14:37,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:14:37,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-13 20:14:37,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:14:37,061 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) [2021-07-13 20:14:37,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:14:37,129 INFO L93 Difference]: Finished difference Result 1430 states and 2770 transitions. [2021-07-13 20:14:37,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 20:14:37,130 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 [2021-07-13 20:14:37,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:14:37,133 INFO L225 Difference]: With dead ends: 1430 [2021-07-13 20:14:37,133 INFO L226 Difference]: Without dead ends: 1377 [2021-07-13 20:14:37,133 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 251.1ms TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:14:37,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1377 states. [2021-07-13 20:14:37,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1377 to 1221. [2021-07-13 20:14:37,143 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) [2021-07-13 20:14:37,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1221 states to 1221 states and 2510 transitions. [2021-07-13 20:14:37,149 INFO L78 Accepts]: Start accepts. Automaton has 1221 states and 2510 transitions. Word has length 60 [2021-07-13 20:14:37,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:14:37,149 INFO L482 AbstractCegarLoop]: Abstraction has 1221 states and 2510 transitions. [2021-07-13 20:14:37,149 INFO L483 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) [2021-07-13 20:14:37,149 INFO L276 IsEmpty]: Start isEmpty. Operand 1221 states and 2510 transitions. [2021-07-13 20:14:37,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-07-13 20:14:37,150 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:14:37,150 INFO L508 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:14:37,366 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-07-13 20:14:37,367 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:14:37,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:14:37,367 INFO L82 PathProgramCache]: Analyzing trace with hash -1547869706, now seen corresponding path program 46 times [2021-07-13 20:14:37,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:14:37,367 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151047445] [2021-07-13 20:14:37,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:14:37,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:14:38,555 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:14:38,556 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:14:38,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151047445] [2021-07-13 20:14:38,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151047445] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:38,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927994040] [2021-07-13 20:14:38,556 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 [2021-07-13 20:14:38,595 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:14:38,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:14:38,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 107 conjunts are in the unsatisfiable core [2021-07-13 20:14:38,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:14:38,691 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 [2021-07-13 20:14:38,692 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:14:38,693 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:14:38,693 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:14:38,693 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-07-13 20:14:38,697 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:14:38,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927994040] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:38,698 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:14:38,698 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2021-07-13 20:14:38,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606200595] [2021-07-13 20:14:38,698 INFO L462 AbstractCegarLoop]: Interpolant automaton has 55 states [2021-07-13 20:14:38,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:14:38,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-07-13 20:14:38,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=2863, Unknown=0, NotChecked=0, Total=2970 [2021-07-13 20:14:38,699 INFO L87 Difference]: Start difference. First operand 1221 states and 2510 transitions. Second operand has 55 states, 55 states have (on average 1.1090909090909091) internal successors, (61), 54 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) [2021-07-13 20:14:42,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:14:42,262 INFO L93 Difference]: Finished difference Result 2489 states and 4915 transitions. [2021-07-13 20:14:42,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-07-13 20:14:42,263 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.1090909090909091) internal successors, (61), 54 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 61 [2021-07-13 20:14:42,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:14:42,265 INFO L225 Difference]: With dead ends: 2489 [2021-07-13 20:14:42,265 INFO L226 Difference]: Without dead ends: 1575 [2021-07-13 20:14:42,265 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1326 ImplicationChecksByTransitivity, 3860.0ms TimeCoverageRelationStatistics Valid=1615, Invalid=9727, Unknown=0, NotChecked=0, Total=11342 [2021-07-13 20:14:42,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1575 states. [2021-07-13 20:14:42,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1575 to 146. [2021-07-13 20:14:42,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 1.9724137931034482) internal successors, (286), 145 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:42,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 286 transitions. [2021-07-13 20:14:42,271 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 286 transitions. Word has length 61 [2021-07-13 20:14:42,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:14:42,271 INFO L482 AbstractCegarLoop]: Abstraction has 146 states and 286 transitions. [2021-07-13 20:14:42,271 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 55 states, 55 states have (on average 1.1090909090909091) internal successors, (61), 54 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) [2021-07-13 20:14:42,271 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 286 transitions. [2021-07-13 20:14:42,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-07-13 20:14:42,271 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:14:42,272 INFO L508 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:14:42,472 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-07-13 20:14:42,472 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:14:42,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:14:42,473 INFO L82 PathProgramCache]: Analyzing trace with hash -716249929, now seen corresponding path program 47 times [2021-07-13 20:14:42,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:14:42,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426178494] [2021-07-13 20:14:42,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:14:42,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:14:42,777 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 378 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:14:42,777 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:14:42,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426178494] [2021-07-13 20:14:42,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426178494] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:42,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778956245] [2021-07-13 20:14:42,778 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 [2021-07-13 20:14:42,829 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2021-07-13 20:14:42,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:14:42,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 54 conjunts are in the unsatisfiable core [2021-07-13 20:14:42,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:14:42,932 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 378 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:14:42,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778956245] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:42,932 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:14:42,932 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28] total 29 [2021-07-13 20:14:42,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543166719] [2021-07-13 20:14:42,932 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-13 20:14:42,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:14:42,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-13 20:14:42,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2021-07-13 20:14:42,933 INFO L87 Difference]: Start difference. First operand 146 states and 286 transitions. Second operand has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 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) [2021-07-13 20:14:43,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:14:43,003 INFO L93 Difference]: Finished difference Result 1525 states and 2957 transitions. [2021-07-13 20:14:43,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 20:14:43,003 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 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 62 [2021-07-13 20:14:43,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:14:43,005 INFO L225 Difference]: With dead ends: 1525 [2021-07-13 20:14:43,005 INFO L226 Difference]: Without dead ends: 1470 [2021-07-13 20:14:43,005 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 274.4ms TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2021-07-13 20:14:43,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1470 states. [2021-07-13 20:14:43,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1470 to 1308. [2021-07-13 20:14:43,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1308 states, 1307 states have (on average 2.0558530986993113) internal successors, (2687), 1307 states have internal predecessors, (2687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:43,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1308 states to 1308 states and 2687 transitions. [2021-07-13 20:14:43,018 INFO L78 Accepts]: Start accepts. Automaton has 1308 states and 2687 transitions. Word has length 62 [2021-07-13 20:14:43,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:14:43,018 INFO L482 AbstractCegarLoop]: Abstraction has 1308 states and 2687 transitions. [2021-07-13 20:14:43,018 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 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) [2021-07-13 20:14:43,018 INFO L276 IsEmpty]: Start isEmpty. Operand 1308 states and 2687 transitions. [2021-07-13 20:14:43,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-07-13 20:14:43,019 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:14:43,019 INFO L508 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:14:43,232 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:14:43,233 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:14:43,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:14:43,233 INFO L82 PathProgramCache]: Analyzing trace with hash -2008609534, now seen corresponding path program 48 times [2021-07-13 20:14:43,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:14:43,233 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664187876] [2021-07-13 20:14:43,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:14:43,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:14:44,431 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:14:44,431 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:14:44,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664187876] [2021-07-13 20:14:44,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664187876] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:44,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633881854] [2021-07-13 20:14:44,431 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 [2021-07-13 20:14:44,478 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-07-13 20:14:44,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:14:44,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 111 conjunts are in the unsatisfiable core [2021-07-13 20:14:44,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:14:44,580 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 [2021-07-13 20:14:44,581 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:14:44,582 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:14:44,582 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:14:44,582 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-07-13 20:14:44,587 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:14:44,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633881854] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:44,587 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:14:44,587 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2021-07-13 20:14:44,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679474144] [2021-07-13 20:14:44,587 INFO L462 AbstractCegarLoop]: Interpolant automaton has 57 states [2021-07-13 20:14:44,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:14:44,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-07-13 20:14:44,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=3081, Unknown=0, NotChecked=0, Total=3192 [2021-07-13 20:14:44,588 INFO L87 Difference]: Start difference. First operand 1308 states and 2687 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) [2021-07-13 20:14:48,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:14:48,496 INFO L93 Difference]: Finished difference Result 2665 states and 5265 transitions. [2021-07-13 20:14:48,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-07-13 20:14:48,497 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 [2021-07-13 20:14:48,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:14:48,499 INFO L225 Difference]: With dead ends: 2665 [2021-07-13 20:14:48,499 INFO L226 Difference]: Without dead ends: 1689 [2021-07-13 20:14:48,500 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1431 ImplicationChecksByTransitivity, 4104.7ms TimeCoverageRelationStatistics Valid=1731, Invalid=10479, Unknown=0, NotChecked=0, Total=12210 [2021-07-13 20:14:48,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1689 states. [2021-07-13 20:14:48,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1689 to 151. [2021-07-13 20:14:48,507 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) [2021-07-13 20:14:48,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 296 transitions. [2021-07-13 20:14:48,507 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 296 transitions. Word has length 63 [2021-07-13 20:14:48,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:14:48,507 INFO L482 AbstractCegarLoop]: Abstraction has 151 states and 296 transitions. [2021-07-13 20:14:48,507 INFO L483 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) [2021-07-13 20:14:48,507 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 296 transitions. [2021-07-13 20:14:48,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-07-13 20:14:48,508 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:14:48,508 INFO L508 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:14:48,708 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-07-13 20:14:48,708 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:14:48,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:14:48,708 INFO L82 PathProgramCache]: Analyzing trace with hash -2114282709, now seen corresponding path program 49 times [2021-07-13 20:14:48,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:14:48,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530497344] [2021-07-13 20:14:48,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:14:48,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:14:49,045 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 406 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:14:49,045 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:14:49,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530497344] [2021-07-13 20:14:49,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530497344] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:49,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800575519] [2021-07-13 20:14:49,046 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 [2021-07-13 20:14:49,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:14:49,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 56 conjunts are in the unsatisfiable core [2021-07-13 20:14:49,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:14:49,205 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 406 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:14:49,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800575519] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:49,205 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:14:49,205 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 30 [2021-07-13 20:14:49,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988231396] [2021-07-13 20:14:49,206 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-13 20:14:49,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:14:49,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-13 20:14:49,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:14:49,206 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) [2021-07-13 20:14:49,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:14:49,296 INFO L93 Difference]: Finished difference Result 1623 states and 3150 transitions. [2021-07-13 20:14:49,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 20:14:49,296 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 [2021-07-13 20:14:49,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:14:49,298 INFO L225 Difference]: With dead ends: 1623 [2021-07-13 20:14:49,298 INFO L226 Difference]: Without dead ends: 1566 [2021-07-13 20:14:49,298 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 300.3ms TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:14:49,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1566 states. [2021-07-13 20:14:49,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1566 to 1398. [2021-07-13 20:14:49,313 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) [2021-07-13 20:14:49,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1398 states to 1398 states and 2870 transitions. [2021-07-13 20:14:49,315 INFO L78 Accepts]: Start accepts. Automaton has 1398 states and 2870 transitions. Word has length 64 [2021-07-13 20:14:49,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:14:49,315 INFO L482 AbstractCegarLoop]: Abstraction has 1398 states and 2870 transitions. [2021-07-13 20:14:49,315 INFO L483 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) [2021-07-13 20:14:49,315 INFO L276 IsEmpty]: Start isEmpty. Operand 1398 states and 2870 transitions. [2021-07-13 20:14:49,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-13 20:14:49,317 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:14:49,317 INFO L508 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:14:49,526 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:14:49,526 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:14:49,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:14:49,526 INFO L82 PathProgramCache]: Analyzing trace with hash 1468652726, now seen corresponding path program 50 times [2021-07-13 20:14:49,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:14:49,526 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051550574] [2021-07-13 20:14:49,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:14:49,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:14:50,831 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:14:50,831 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:14:50,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051550574] [2021-07-13 20:14:50,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051550574] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:50,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259553988] [2021-07-13 20:14:50,832 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 [2021-07-13 20:14:50,874 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:14:50,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:14:50,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 115 conjunts are in the unsatisfiable core [2021-07-13 20:14:50,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:14:50,975 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 [2021-07-13 20:14:50,976 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:14:50,977 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:14:50,977 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:14:50,977 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-07-13 20:14:50,982 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:14:50,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259553988] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:50,982 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:14:50,982 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2021-07-13 20:14:50,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255844746] [2021-07-13 20:14:50,982 INFO L462 AbstractCegarLoop]: Interpolant automaton has 59 states [2021-07-13 20:14:50,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:14:50,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-07-13 20:14:50,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=3307, Unknown=0, NotChecked=0, Total=3422 [2021-07-13 20:14:50,983 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) [2021-07-13 20:14:55,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:14:55,227 INFO L93 Difference]: Finished difference Result 2847 states and 5627 transitions. [2021-07-13 20:14:55,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-07-13 20:14:55,227 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 [2021-07-13 20:14:55,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:14:55,229 INFO L225 Difference]: With dead ends: 2847 [2021-07-13 20:14:55,229 INFO L226 Difference]: Without dead ends: 1807 [2021-07-13 20:14:55,230 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1540 ImplicationChecksByTransitivity, 4513.4ms TimeCoverageRelationStatistics Valid=1851, Invalid=11259, Unknown=0, NotChecked=0, Total=13110 [2021-07-13 20:14:55,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1807 states. [2021-07-13 20:14:55,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1807 to 156. [2021-07-13 20:14:55,236 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) [2021-07-13 20:14:55,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 306 transitions. [2021-07-13 20:14:55,236 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 306 transitions. Word has length 65 [2021-07-13 20:14:55,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:14:55,237 INFO L482 AbstractCegarLoop]: Abstraction has 156 states and 306 transitions. [2021-07-13 20:14:55,237 INFO L483 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) [2021-07-13 20:14:55,237 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 306 transitions. [2021-07-13 20:14:55,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-07-13 20:14:55,237 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:14:55,237 INFO L508 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:14:55,443 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:14:55,443 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:14:55,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:14:55,443 INFO L82 PathProgramCache]: Analyzing trace with hash -1693335049, now seen corresponding path program 51 times [2021-07-13 20:14:55,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:14:55,443 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849743050] [2021-07-13 20:14:55,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:14:55,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:14:55,793 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 435 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:14:55,794 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:14:55,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849743050] [2021-07-13 20:14:55,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849743050] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:55,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237710771] [2021-07-13 20:14:55,794 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 [2021-07-13 20:14:55,850 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-07-13 20:14:55,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:14:55,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 58 conjunts are in the unsatisfiable core [2021-07-13 20:14:55,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:14:55,968 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 435 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:14:55,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237710771] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:55,969 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:14:55,969 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30] total 31 [2021-07-13 20:14:55,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128557848] [2021-07-13 20:14:55,969 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-13 20:14:55,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:14:55,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-13 20:14:55,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:14:55,970 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) [2021-07-13 20:14:56,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:14:56,048 INFO L93 Difference]: Finished difference Result 1724 states and 3349 transitions. [2021-07-13 20:14:56,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 20:14:56,049 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 [2021-07-13 20:14:56,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:14:56,050 INFO L225 Difference]: With dead ends: 1724 [2021-07-13 20:14:56,050 INFO L226 Difference]: Without dead ends: 1665 [2021-07-13 20:14:56,050 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 316.9ms TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:14:56,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1665 states. [2021-07-13 20:14:56,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1665 to 1491. [2021-07-13 20:14:56,063 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) [2021-07-13 20:14:56,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1491 states to 1491 states and 3059 transitions. [2021-07-13 20:14:56,064 INFO L78 Accepts]: Start accepts. Automaton has 1491 states and 3059 transitions. Word has length 66 [2021-07-13 20:14:56,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:14:56,064 INFO L482 AbstractCegarLoop]: Abstraction has 1491 states and 3059 transitions. [2021-07-13 20:14:56,065 INFO L483 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) [2021-07-13 20:14:56,065 INFO L276 IsEmpty]: Start isEmpty. Operand 1491 states and 3059 transitions. [2021-07-13 20:14:56,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-07-13 20:14:56,066 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:14:56,066 INFO L508 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:14:56,283 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-07-13 20:14:56,283 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:14:56,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:14:56,283 INFO L82 PathProgramCache]: Analyzing trace with hash 1238813890, now seen corresponding path program 52 times [2021-07-13 20:14:56,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:14:56,283 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823816395] [2021-07-13 20:14:56,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:14:56,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:14:57,704 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:14:57,704 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:14:57,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823816395] [2021-07-13 20:14:57,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823816395] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:57,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880090091] [2021-07-13 20:14:57,704 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 [2021-07-13 20:14:57,747 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:14:57,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:14:57,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 119 conjunts are in the unsatisfiable core [2021-07-13 20:14:57,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:14:57,850 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 [2021-07-13 20:14:57,851 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:14:57,852 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:14:57,852 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:14:57,852 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-07-13 20:14:57,856 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:14:57,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [880090091] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:57,856 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:14:57,857 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 60 [2021-07-13 20:14:57,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268766189] [2021-07-13 20:14:57,857 INFO L462 AbstractCegarLoop]: Interpolant automaton has 61 states [2021-07-13 20:14:57,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:14:57,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-07-13 20:14:57,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=3541, Unknown=0, NotChecked=0, Total=3660 [2021-07-13 20:14:57,858 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) [2021-07-13 20:15:02,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:15:02,478 INFO L93 Difference]: Finished difference Result 3035 states and 6001 transitions. [2021-07-13 20:15:02,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-07-13 20:15:02,478 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 [2021-07-13 20:15:02,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:15:02,480 INFO L225 Difference]: With dead ends: 3035 [2021-07-13 20:15:02,480 INFO L226 Difference]: Without dead ends: 1929 [2021-07-13 20:15:02,481 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 65 SyntacticMatches, 2 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1653 ImplicationChecksByTransitivity, 4912.4ms TimeCoverageRelationStatistics Valid=1975, Invalid=12067, Unknown=0, NotChecked=0, Total=14042 [2021-07-13 20:15:02,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1929 states. [2021-07-13 20:15:02,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1929 to 161. [2021-07-13 20:15:02,487 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) [2021-07-13 20:15:02,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 316 transitions. [2021-07-13 20:15:02,487 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 316 transitions. Word has length 67 [2021-07-13 20:15:02,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:15:02,487 INFO L482 AbstractCegarLoop]: Abstraction has 161 states and 316 transitions. [2021-07-13 20:15:02,487 INFO L483 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) [2021-07-13 20:15:02,487 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 316 transitions. [2021-07-13 20:15:02,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-07-13 20:15:02,488 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:15:02,488 INFO L508 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:15:02,688 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:15:02,688 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:15:02,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:15:02,689 INFO L82 PathProgramCache]: Analyzing trace with hash -228404373, now seen corresponding path program 53 times [2021-07-13 20:15:02,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:15:02,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884608953] [2021-07-13 20:15:02,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:15:02,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:15:03,044 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 465 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:03,044 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:15:03,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884608953] [2021-07-13 20:15:03,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884608953] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:03,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672283124] [2021-07-13 20:15:03,045 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 [2021-07-13 20:15:03,115 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-07-13 20:15:03,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:15:03,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 60 conjunts are in the unsatisfiable core [2021-07-13 20:15:03,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:15:03,240 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 465 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:03,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [672283124] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:03,240 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:15:03,240 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31] total 32 [2021-07-13 20:15:03,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764100572] [2021-07-13 20:15:03,240 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-07-13 20:15:03,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:15:03,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-07-13 20:15:03,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 20:15:03,241 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) [2021-07-13 20:15:03,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:15:03,335 INFO L93 Difference]: Finished difference Result 1828 states and 3554 transitions. [2021-07-13 20:15:03,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 20:15:03,336 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 [2021-07-13 20:15:03,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:15:03,338 INFO L225 Difference]: With dead ends: 1828 [2021-07-13 20:15:03,338 INFO L226 Difference]: Without dead ends: 1767 [2021-07-13 20:15:03,338 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 321.4ms TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 20:15:03,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1767 states. [2021-07-13 20:15:03,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1767 to 1587. [2021-07-13 20:15:03,352 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) [2021-07-13 20:15:03,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1587 states to 1587 states and 3254 transitions. [2021-07-13 20:15:03,354 INFO L78 Accepts]: Start accepts. Automaton has 1587 states and 3254 transitions. Word has length 68 [2021-07-13 20:15:03,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:15:03,354 INFO L482 AbstractCegarLoop]: Abstraction has 1587 states and 3254 transitions. [2021-07-13 20:15:03,354 INFO L483 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) [2021-07-13 20:15:03,355 INFO L276 IsEmpty]: Start isEmpty. Operand 1587 states and 3254 transitions. [2021-07-13 20:15:03,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-07-13 20:15:03,356 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:15:03,356 INFO L508 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:15:03,556 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-07-13 20:15:03,557 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:15:03,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:15:03,557 INFO L82 PathProgramCache]: Analyzing trace with hash 68179830, now seen corresponding path program 54 times [2021-07-13 20:15:03,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:15:03,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092416361] [2021-07-13 20:15:03,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:15:03,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:15:05,025 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:05,025 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:15:05,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092416361] [2021-07-13 20:15:05,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092416361] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:05,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939613767] [2021-07-13 20:15:05,025 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 [2021-07-13 20:15:05,081 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-07-13 20:15:05,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:15:05,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 123 conjunts are in the unsatisfiable core [2021-07-13 20:15:05,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:15:05,224 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 [2021-07-13 20:15:05,225 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:15:05,226 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:15:05,226 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:15:05,227 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-07-13 20:15:05,231 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:05,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939613767] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:05,231 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:15:05,232 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 62 [2021-07-13 20:15:05,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485401393] [2021-07-13 20:15:05,232 INFO L462 AbstractCegarLoop]: Interpolant automaton has 63 states [2021-07-13 20:15:05,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:15:05,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-07-13 20:15:05,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2021-07-13 20:15:05,233 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) [2021-07-13 20:15:10,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:15:10,783 INFO L93 Difference]: Finished difference Result 3229 states and 6387 transitions. [2021-07-13 20:15:10,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-07-13 20:15:10,783 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 [2021-07-13 20:15:10,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:15:10,785 INFO L225 Difference]: With dead ends: 3229 [2021-07-13 20:15:10,785 INFO L226 Difference]: Without dead ends: 2055 [2021-07-13 20:15:10,786 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1770 ImplicationChecksByTransitivity, 5658.5ms TimeCoverageRelationStatistics Valid=2103, Invalid=12903, Unknown=0, NotChecked=0, Total=15006 [2021-07-13 20:15:10,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2055 states. [2021-07-13 20:15:10,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2055 to 166. [2021-07-13 20:15:10,792 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) [2021-07-13 20:15:10,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 326 transitions. [2021-07-13 20:15:10,793 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 326 transitions. Word has length 69 [2021-07-13 20:15:10,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:15:10,793 INFO L482 AbstractCegarLoop]: Abstraction has 166 states and 326 transitions. [2021-07-13 20:15:10,793 INFO L483 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) [2021-07-13 20:15:10,793 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 326 transitions. [2021-07-13 20:15:10,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-07-13 20:15:10,793 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:15:10,793 INFO L508 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:15:10,994 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-07-13 20:15:10,994 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:15:10,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:15:10,994 INFO L82 PathProgramCache]: Analyzing trace with hash 2136645431, now seen corresponding path program 55 times [2021-07-13 20:15:10,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:15:10,994 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761303859] [2021-07-13 20:15:10,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:15:11,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:15:11,385 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 496 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:11,385 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:15:11,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761303859] [2021-07-13 20:15:11,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761303859] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:11,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750997013] [2021-07-13 20:15:11,385 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 [2021-07-13 20:15:11,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:15:11,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 62 conjunts are in the unsatisfiable core [2021-07-13 20:15:11,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:15:11,561 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 496 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:11,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750997013] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:11,561 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:15:11,561 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32] total 33 [2021-07-13 20:15:11,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076399078] [2021-07-13 20:15:11,562 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-07-13 20:15:11,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:15:11,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-07-13 20:15:11,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 20:15:11,562 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) [2021-07-13 20:15:11,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:15:11,668 INFO L93 Difference]: Finished difference Result 1935 states and 3765 transitions. [2021-07-13 20:15:11,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-13 20:15:11,669 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 [2021-07-13 20:15:11,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:15:11,671 INFO L225 Difference]: With dead ends: 1935 [2021-07-13 20:15:11,671 INFO L226 Difference]: Without dead ends: 1872 [2021-07-13 20:15:11,671 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 358.2ms TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 20:15:11,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1872 states. [2021-07-13 20:15:11,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1872 to 1686. [2021-07-13 20:15:11,684 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) [2021-07-13 20:15:11,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1686 states to 1686 states and 3455 transitions. [2021-07-13 20:15:11,686 INFO L78 Accepts]: Start accepts. Automaton has 1686 states and 3455 transitions. Word has length 70 [2021-07-13 20:15:11,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:15:11,686 INFO L482 AbstractCegarLoop]: Abstraction has 1686 states and 3455 transitions. [2021-07-13 20:15:11,686 INFO L483 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) [2021-07-13 20:15:11,686 INFO L276 IsEmpty]: Start isEmpty. Operand 1686 states and 3455 transitions. [2021-07-13 20:15:11,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-07-13 20:15:11,688 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:15:11,688 INFO L508 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:15:11,888 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:15:11,888 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:15:11,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:15:11,889 INFO L82 PathProgramCache]: Analyzing trace with hash -608744318, now seen corresponding path program 56 times [2021-07-13 20:15:11,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:15:11,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553915956] [2021-07-13 20:15:11,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:15:11,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:15:13,690 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:13,690 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:15:13,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553915956] [2021-07-13 20:15:13,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553915956] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:13,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510100439] [2021-07-13 20:15:13,690 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 [2021-07-13 20:15:13,737 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:15:13,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:15:13,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 127 conjunts are in the unsatisfiable core [2021-07-13 20:15:13,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:15:13,859 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 [2021-07-13 20:15:13,860 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:15:13,861 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:15:13,861 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:15:13,861 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-07-13 20:15:13,866 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:13,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510100439] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:13,866 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:15:13,866 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 64 [2021-07-13 20:15:13,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545338972] [2021-07-13 20:15:13,866 INFO L462 AbstractCegarLoop]: Interpolant automaton has 65 states [2021-07-13 20:15:13,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:15:13,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-07-13 20:15:13,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=4033, Unknown=0, NotChecked=0, Total=4160 [2021-07-13 20:15:13,867 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) [2021-07-13 20:15:19,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:15:19,488 INFO L93 Difference]: Finished difference Result 3429 states and 6785 transitions. [2021-07-13 20:15:19,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-07-13 20:15:19,488 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 [2021-07-13 20:15:19,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:15:19,491 INFO L225 Difference]: With dead ends: 3429 [2021-07-13 20:15:19,491 INFO L226 Difference]: Without dead ends: 2185 [2021-07-13 20:15:19,492 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 69 SyntacticMatches, 2 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1891 ImplicationChecksByTransitivity, 6021.1ms TimeCoverageRelationStatistics Valid=2235, Invalid=13767, Unknown=0, NotChecked=0, Total=16002 [2021-07-13 20:15:19,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2185 states. [2021-07-13 20:15:19,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2185 to 171. [2021-07-13 20:15:19,498 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) [2021-07-13 20:15:19,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 336 transitions. [2021-07-13 20:15:19,499 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 336 transitions. Word has length 71 [2021-07-13 20:15:19,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:15:19,499 INFO L482 AbstractCegarLoop]: Abstraction has 171 states and 336 transitions. [2021-07-13 20:15:19,499 INFO L483 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) [2021-07-13 20:15:19,499 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 336 transitions. [2021-07-13 20:15:19,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-07-13 20:15:19,499 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:15:19,499 INFO L508 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:15:19,700 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-07-13 20:15:19,700 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:15:19,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:15:19,700 INFO L82 PathProgramCache]: Analyzing trace with hash -1668133973, now seen corresponding path program 57 times [2021-07-13 20:15:19,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:15:19,700 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580556024] [2021-07-13 20:15:19,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:15:19,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:15:20,097 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 528 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:20,097 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:15:20,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580556024] [2021-07-13 20:15:20,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580556024] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:20,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369809267] [2021-07-13 20:15:20,097 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 [2021-07-13 20:15:20,153 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2021-07-13 20:15:20,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:15:20,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 64 conjunts are in the unsatisfiable core [2021-07-13 20:15:20,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:15:20,270 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 528 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:20,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369809267] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:20,271 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:15:20,271 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33] total 34 [2021-07-13 20:15:20,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175829689] [2021-07-13 20:15:20,271 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-07-13 20:15:20,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:15:20,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-07-13 20:15:20,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:15:20,272 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) [2021-07-13 20:15:20,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:15:20,364 INFO L93 Difference]: Finished difference Result 2045 states and 3982 transitions. [2021-07-13 20:15:20,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-13 20:15:20,364 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 [2021-07-13 20:15:20,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:15:20,366 INFO L225 Difference]: With dead ends: 2045 [2021-07-13 20:15:20,366 INFO L226 Difference]: Without dead ends: 1980 [2021-07-13 20:15:20,366 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 364.3ms TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:15:20,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1980 states. [2021-07-13 20:15:20,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1980 to 1788. [2021-07-13 20:15:20,380 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) [2021-07-13 20:15:20,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1788 states to 1788 states and 3662 transitions. [2021-07-13 20:15:20,382 INFO L78 Accepts]: Start accepts. Automaton has 1788 states and 3662 transitions. Word has length 72 [2021-07-13 20:15:20,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:15:20,382 INFO L482 AbstractCegarLoop]: Abstraction has 1788 states and 3662 transitions. [2021-07-13 20:15:20,382 INFO L483 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) [2021-07-13 20:15:20,382 INFO L276 IsEmpty]: Start isEmpty. Operand 1788 states and 3662 transitions. [2021-07-13 20:15:20,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-07-13 20:15:20,383 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:15:20,384 INFO L508 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:15:20,584 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:15:20,584 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:15:20,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:15:20,584 INFO L82 PathProgramCache]: Analyzing trace with hash 1417204278, now seen corresponding path program 58 times [2021-07-13 20:15:20,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:15:20,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315295159] [2021-07-13 20:15:20,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:15:20,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:15:22,212 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:22,212 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:15:22,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315295159] [2021-07-13 20:15:22,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315295159] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:22,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684420337] [2021-07-13 20:15:22,213 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 [2021-07-13 20:15:22,255 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:15:22,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:15:22,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 131 conjunts are in the unsatisfiable core [2021-07-13 20:15:22,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:15:22,368 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 [2021-07-13 20:15:22,369 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:15:22,375 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:15:22,375 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:15:22,375 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-07-13 20:15:22,380 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:22,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1684420337] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:22,380 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:15:22,380 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 66 [2021-07-13 20:15:22,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693708576] [2021-07-13 20:15:22,380 INFO L462 AbstractCegarLoop]: Interpolant automaton has 67 states [2021-07-13 20:15:22,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:15:22,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-07-13 20:15:22,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=4291, Unknown=0, NotChecked=0, Total=4422 [2021-07-13 20:15:22,380 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) [2021-07-13 20:15:28,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:15:28,165 INFO L93 Difference]: Finished difference Result 3635 states and 7195 transitions. [2021-07-13 20:15:28,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-07-13 20:15:28,165 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 [2021-07-13 20:15:28,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:15:28,168 INFO L225 Difference]: With dead ends: 3635 [2021-07-13 20:15:28,168 INFO L226 Difference]: Without dead ends: 2319 [2021-07-13 20:15:28,169 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 71 SyntacticMatches, 2 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2016 ImplicationChecksByTransitivity, 6053.2ms TimeCoverageRelationStatistics Valid=2371, Invalid=14659, Unknown=0, NotChecked=0, Total=17030 [2021-07-13 20:15:28,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2319 states. [2021-07-13 20:15:28,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2319 to 176. [2021-07-13 20:15:28,176 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) [2021-07-13 20:15:28,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 346 transitions. [2021-07-13 20:15:28,176 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 346 transitions. Word has length 73 [2021-07-13 20:15:28,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:15:28,176 INFO L482 AbstractCegarLoop]: Abstraction has 176 states and 346 transitions. [2021-07-13 20:15:28,177 INFO L483 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) [2021-07-13 20:15:28,177 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 346 transitions. [2021-07-13 20:15:28,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-07-13 20:15:28,177 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:15:28,177 INFO L508 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:15:28,377 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-07-13 20:15:28,377 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:15:28,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:15:28,378 INFO L82 PathProgramCache]: Analyzing trace with hash 1006730359, now seen corresponding path program 59 times [2021-07-13 20:15:28,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:15:28,378 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729950289] [2021-07-13 20:15:28,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:15:28,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:15:28,785 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 561 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:28,786 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:15:28,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729950289] [2021-07-13 20:15:28,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729950289] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:28,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005815767] [2021-07-13 20:15:28,786 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 [2021-07-13 20:15:28,847 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-07-13 20:15:28,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:15:28,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 66 conjunts are in the unsatisfiable core [2021-07-13 20:15:28,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:15:28,968 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 561 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:28,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005815767] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:28,968 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:15:28,968 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34] total 35 [2021-07-13 20:15:28,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732302595] [2021-07-13 20:15:28,968 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-13 20:15:28,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:15:28,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-13 20:15:28,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 20:15:28,969 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) [2021-07-13 20:15:29,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:15:29,067 INFO L93 Difference]: Finished difference Result 2158 states and 4205 transitions. [2021-07-13 20:15:29,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 20:15:29,068 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 [2021-07-13 20:15:29,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:15:29,069 INFO L225 Difference]: With dead ends: 2158 [2021-07-13 20:15:29,069 INFO L226 Difference]: Without dead ends: 2091 [2021-07-13 20:15:29,070 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 374.9ms TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 20:15:29,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2091 states. [2021-07-13 20:15:29,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2091 to 1893. [2021-07-13 20:15:29,084 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) [2021-07-13 20:15:29,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1893 states to 1893 states and 3875 transitions. [2021-07-13 20:15:29,086 INFO L78 Accepts]: Start accepts. Automaton has 1893 states and 3875 transitions. Word has length 74 [2021-07-13 20:15:29,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:15:29,086 INFO L482 AbstractCegarLoop]: Abstraction has 1893 states and 3875 transitions. [2021-07-13 20:15:29,086 INFO L483 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) [2021-07-13 20:15:29,086 INFO L276 IsEmpty]: Start isEmpty. Operand 1893 states and 3875 transitions. [2021-07-13 20:15:29,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-07-13 20:15:29,087 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:15:29,087 INFO L508 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:15:29,287 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:15:29,288 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:15:29,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:15:29,288 INFO L82 PathProgramCache]: Analyzing trace with hash -1805611966, now seen corresponding path program 60 times [2021-07-13 20:15:29,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:15:29,288 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651389920] [2021-07-13 20:15:29,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:15:29,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:15:31,010 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:31,010 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:15:31,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651389920] [2021-07-13 20:15:31,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651389920] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:31,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623765102] [2021-07-13 20:15:31,011 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 [2021-07-13 20:15:31,067 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2021-07-13 20:15:31,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:15:31,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 135 conjunts are in the unsatisfiable core [2021-07-13 20:15:31,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:15:31,188 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 [2021-07-13 20:15:31,188 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:15:31,189 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:15:31,190 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:15:31,190 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-07-13 20:15:31,194 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:31,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623765102] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:31,194 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:15:31,194 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 68 [2021-07-13 20:15:31,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39088426] [2021-07-13 20:15:31,194 INFO L462 AbstractCegarLoop]: Interpolant automaton has 69 states [2021-07-13 20:15:31,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:15:31,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-07-13 20:15:31,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=4557, Unknown=0, NotChecked=0, Total=4692 [2021-07-13 20:15:31,195 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) [2021-07-13 20:15:37,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:15:37,521 INFO L93 Difference]: Finished difference Result 3847 states and 7617 transitions. [2021-07-13 20:15:37,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-07-13 20:15:37,522 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 [2021-07-13 20:15:37,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:15:37,525 INFO L225 Difference]: With dead ends: 3847 [2021-07-13 20:15:37,525 INFO L226 Difference]: Without dead ends: 2457 [2021-07-13 20:15:37,526 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 73 SyntacticMatches, 2 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2145 ImplicationChecksByTransitivity, 6557.6ms TimeCoverageRelationStatistics Valid=2511, Invalid=15579, Unknown=0, NotChecked=0, Total=18090 [2021-07-13 20:15:37,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2457 states. [2021-07-13 20:15:37,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2457 to 181. [2021-07-13 20:15:37,537 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) [2021-07-13 20:15:37,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 356 transitions. [2021-07-13 20:15:37,538 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 356 transitions. Word has length 75 [2021-07-13 20:15:37,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:15:37,538 INFO L482 AbstractCegarLoop]: Abstraction has 181 states and 356 transitions. [2021-07-13 20:15:37,538 INFO L483 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) [2021-07-13 20:15:37,538 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 356 transitions. [2021-07-13 20:15:37,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-07-13 20:15:37,538 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:15:37,539 INFO L508 BasicCegarLoop]: trace histogram [34, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:15:37,739 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-07-13 20:15:37,739 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:15:37,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:15:37,739 INFO L82 PathProgramCache]: Analyzing trace with hash -116325397, now seen corresponding path program 61 times [2021-07-13 20:15:37,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:15:37,740 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390967043] [2021-07-13 20:15:37,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:15:37,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:15:38,209 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 595 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:38,209 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:15:38,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390967043] [2021-07-13 20:15:38,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390967043] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:38,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373189480] [2021-07-13 20:15:38,209 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 [2021-07-13 20:15:38,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:15:38,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 68 conjunts are in the unsatisfiable core [2021-07-13 20:15:38,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:15:38,378 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 595 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:38,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373189480] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:38,379 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:15:38,379 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35] total 36 [2021-07-13 20:15:38,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016227198] [2021-07-13 20:15:38,379 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:15:38,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:15:38,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:15:38,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:15:38,380 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) [2021-07-13 20:15:38,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:15:38,484 INFO L93 Difference]: Finished difference Result 2274 states and 4434 transitions. [2021-07-13 20:15:38,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-13 20:15:38,485 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 [2021-07-13 20:15:38,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:15:38,487 INFO L225 Difference]: With dead ends: 2274 [2021-07-13 20:15:38,487 INFO L226 Difference]: Without dead ends: 2205 [2021-07-13 20:15:38,487 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 432.6ms TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:15:38,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2205 states. [2021-07-13 20:15:38,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2205 to 2001. [2021-07-13 20:15:38,503 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) [2021-07-13 20:15:38,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2001 states to 2001 states and 4094 transitions. [2021-07-13 20:15:38,505 INFO L78 Accepts]: Start accepts. Automaton has 2001 states and 4094 transitions. Word has length 76 [2021-07-13 20:15:38,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:15:38,505 INFO L482 AbstractCegarLoop]: Abstraction has 2001 states and 4094 transitions. [2021-07-13 20:15:38,505 INFO L483 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) [2021-07-13 20:15:38,505 INFO L276 IsEmpty]: Start isEmpty. Operand 2001 states and 4094 transitions. [2021-07-13 20:15:38,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-07-13 20:15:38,507 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:15:38,507 INFO L508 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:15:38,707 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:15:38,707 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:15:38,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:15:38,708 INFO L82 PathProgramCache]: Analyzing trace with hash -1242870538, now seen corresponding path program 62 times [2021-07-13 20:15:38,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:15:38,708 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029135963] [2021-07-13 20:15:38,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:15:38,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:15:40,566 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:40,566 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:15:40,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029135963] [2021-07-13 20:15:40,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029135963] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:40,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373301878] [2021-07-13 20:15:40,567 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 [2021-07-13 20:15:40,618 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:15:40,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:15:40,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 139 conjunts are in the unsatisfiable core [2021-07-13 20:15:40,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:15:40,737 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 [2021-07-13 20:15:40,738 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:15:40,739 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:15:40,739 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:15:40,739 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-07-13 20:15:40,744 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:40,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1373301878] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:40,744 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:15:40,744 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 70 [2021-07-13 20:15:40,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027111462] [2021-07-13 20:15:40,744 INFO L462 AbstractCegarLoop]: Interpolant automaton has 71 states [2021-07-13 20:15:40,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:15:40,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-07-13 20:15:40,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=4831, Unknown=0, NotChecked=0, Total=4970 [2021-07-13 20:15:40,745 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) [2021-07-13 20:15:47,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:15:47,410 INFO L93 Difference]: Finished difference Result 4065 states and 8051 transitions. [2021-07-13 20:15:47,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-07-13 20:15:47,411 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 [2021-07-13 20:15:47,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:15:47,414 INFO L225 Difference]: With dead ends: 4065 [2021-07-13 20:15:47,414 INFO L226 Difference]: Without dead ends: 2599 [2021-07-13 20:15:47,414 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 75 SyntacticMatches, 2 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2278 ImplicationChecksByTransitivity, 6977.6ms TimeCoverageRelationStatistics Valid=2655, Invalid=16527, Unknown=0, NotChecked=0, Total=19182 [2021-07-13 20:15:47,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2599 states. [2021-07-13 20:15:47,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2599 to 186. [2021-07-13 20:15:47,422 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) [2021-07-13 20:15:47,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 366 transitions. [2021-07-13 20:15:47,422 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 366 transitions. Word has length 77 [2021-07-13 20:15:47,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:15:47,422 INFO L482 AbstractCegarLoop]: Abstraction has 186 states and 366 transitions. [2021-07-13 20:15:47,422 INFO L483 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) [2021-07-13 20:15:47,423 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 366 transitions. [2021-07-13 20:15:47,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-07-13 20:15:47,423 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:15:47,423 INFO L508 BasicCegarLoop]: trace histogram [35, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:15:47,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-07-13 20:15:47,637 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:15:47,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:15:47,637 INFO L82 PathProgramCache]: Analyzing trace with hash 148789687, now seen corresponding path program 63 times [2021-07-13 20:15:47,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:15:47,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927429106] [2021-07-13 20:15:47,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:15:47,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:15:48,108 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 630 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:48,108 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:15:48,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927429106] [2021-07-13 20:15:48,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927429106] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:48,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61169804] [2021-07-13 20:15:48,109 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 [2021-07-13 20:15:48,172 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2021-07-13 20:15:48,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:15:48,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 70 conjunts are in the unsatisfiable core [2021-07-13 20:15:48,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:15:48,304 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 630 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:48,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61169804] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:48,304 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:15:48,304 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36] total 37 [2021-07-13 20:15:48,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659232122] [2021-07-13 20:15:48,304 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-07-13 20:15:48,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:15:48,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-07-13 20:15:48,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 20:15:48,305 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) [2021-07-13 20:15:48,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:15:48,421 INFO L93 Difference]: Finished difference Result 2393 states and 4669 transitions. [2021-07-13 20:15:48,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-13 20:15:48,422 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 [2021-07-13 20:15:48,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:15:48,425 INFO L225 Difference]: With dead ends: 2393 [2021-07-13 20:15:48,425 INFO L226 Difference]: Without dead ends: 2322 [2021-07-13 20:15:48,425 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 435.2ms TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 20:15:48,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2322 states. [2021-07-13 20:15:48,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2322 to 2112. [2021-07-13 20:15:48,444 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) [2021-07-13 20:15:48,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2112 states to 2112 states and 4319 transitions. [2021-07-13 20:15:48,447 INFO L78 Accepts]: Start accepts. Automaton has 2112 states and 4319 transitions. Word has length 78 [2021-07-13 20:15:48,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:15:48,447 INFO L482 AbstractCegarLoop]: Abstraction has 2112 states and 4319 transitions. [2021-07-13 20:15:48,447 INFO L483 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) [2021-07-13 20:15:48,448 INFO L276 IsEmpty]: Start isEmpty. Operand 2112 states and 4319 transitions. [2021-07-13 20:15:48,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-07-13 20:15:48,449 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:15:48,449 INFO L508 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:15:48,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:15:48,665 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:15:48,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:15:48,665 INFO L82 PathProgramCache]: Analyzing trace with hash -129332222, now seen corresponding path program 64 times [2021-07-13 20:15:48,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:15:48,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122189960] [2021-07-13 20:15:48,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:15:48,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:15:50,649 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:50,650 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:15:50,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122189960] [2021-07-13 20:15:50,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122189960] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:50,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886697183] [2021-07-13 20:15:50,650 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 [2021-07-13 20:15:50,702 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:15:50,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:15:50,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 143 conjunts are in the unsatisfiable core [2021-07-13 20:15:50,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:15:50,824 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 [2021-07-13 20:15:50,825 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:15:50,826 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:15:50,826 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:15:50,826 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-07-13 20:15:50,830 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:50,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886697183] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:50,830 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:15:50,830 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 72 [2021-07-13 20:15:50,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538009530] [2021-07-13 20:15:50,831 INFO L462 AbstractCegarLoop]: Interpolant automaton has 73 states [2021-07-13 20:15:50,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:15:50,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2021-07-13 20:15:50,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=5113, Unknown=0, NotChecked=0, Total=5256 [2021-07-13 20:15:50,831 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) [2021-07-13 20:15:58,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:15:58,328 INFO L93 Difference]: Finished difference Result 4289 states and 8497 transitions. [2021-07-13 20:15:58,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-07-13 20:15:58,328 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 [2021-07-13 20:15:58,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:15:58,332 INFO L225 Difference]: With dead ends: 4289 [2021-07-13 20:15:58,332 INFO L226 Difference]: Without dead ends: 2745 [2021-07-13 20:15:58,333 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 77 SyntacticMatches, 2 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2415 ImplicationChecksByTransitivity, 7803.6ms TimeCoverageRelationStatistics Valid=2803, Invalid=17503, Unknown=0, NotChecked=0, Total=20306 [2021-07-13 20:15:58,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2745 states. [2021-07-13 20:15:58,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2745 to 191. [2021-07-13 20:15:58,341 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) [2021-07-13 20:15:58,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 376 transitions. [2021-07-13 20:15:58,341 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 376 transitions. Word has length 79 [2021-07-13 20:15:58,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:15:58,341 INFO L482 AbstractCegarLoop]: Abstraction has 191 states and 376 transitions. [2021-07-13 20:15:58,341 INFO L483 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) [2021-07-13 20:15:58,341 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 376 transitions. [2021-07-13 20:15:58,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-07-13 20:15:58,342 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:15:58,342 INFO L508 BasicCegarLoop]: trace histogram [36, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:15:58,542 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-07-13 20:15:58,542 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:15:58,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:15:58,542 INFO L82 PathProgramCache]: Analyzing trace with hash 308739115, now seen corresponding path program 65 times [2021-07-13 20:15:58,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:15:58,543 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89824404] [2021-07-13 20:15:58,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:15:58,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:15:59,082 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 666 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:59,082 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:15:59,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89824404] [2021-07-13 20:15:59,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89824404] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:59,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220662683] [2021-07-13 20:15:59,082 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 [2021-07-13 20:15:59,160 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2021-07-13 20:15:59,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:15:59,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 72 conjunts are in the unsatisfiable core [2021-07-13 20:15:59,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:15:59,298 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 666 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:59,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220662683] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:59,298 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:15:59,299 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37] total 38 [2021-07-13 20:15:59,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194760011] [2021-07-13 20:15:59,299 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-13 20:15:59,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:15:59,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-13 20:15:59,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:15:59,299 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) [2021-07-13 20:15:59,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:15:59,427 INFO L93 Difference]: Finished difference Result 2515 states and 4910 transitions. [2021-07-13 20:15:59,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-13 20:15:59,428 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 [2021-07-13 20:15:59,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:15:59,431 INFO L225 Difference]: With dead ends: 2515 [2021-07-13 20:15:59,431 INFO L226 Difference]: Without dead ends: 2442 [2021-07-13 20:15:59,431 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 488.7ms TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:15:59,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2442 states. [2021-07-13 20:15:59,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2442 to 2226. [2021-07-13 20:15:59,448 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) [2021-07-13 20:15:59,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2226 states to 2226 states and 4550 transitions. [2021-07-13 20:15:59,450 INFO L78 Accepts]: Start accepts. Automaton has 2226 states and 4550 transitions. Word has length 80 [2021-07-13 20:15:59,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:15:59,450 INFO L482 AbstractCegarLoop]: Abstraction has 2226 states and 4550 transitions. [2021-07-13 20:15:59,450 INFO L483 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) [2021-07-13 20:15:59,450 INFO L276 IsEmpty]: Start isEmpty. Operand 2226 states and 4550 transitions. [2021-07-13 20:15:59,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-07-13 20:15:59,452 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:15:59,452 INFO L508 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:15:59,652 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-07-13 20:15:59,653 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:15:59,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:15:59,653 INFO L82 PathProgramCache]: Analyzing trace with hash -678443082, now seen corresponding path program 66 times [2021-07-13 20:15:59,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:15:59,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377284971] [2021-07-13 20:15:59,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:15:59,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:16:01,894 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:16:01,894 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:16:01,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377284971] [2021-07-13 20:16:01,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377284971] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:01,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873142964] [2021-07-13 20:16:01,894 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 [2021-07-13 20:16:01,959 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-07-13 20:16:01,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:16:01,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 147 conjunts are in the unsatisfiable core [2021-07-13 20:16:01,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:16:02,097 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 [2021-07-13 20:16:02,098 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:16:02,099 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:16:02,099 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:16:02,099 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-07-13 20:16:02,104 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:16:02,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873142964] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:02,104 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:16:02,104 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 74 [2021-07-13 20:16:02,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108148373] [2021-07-13 20:16:02,105 INFO L462 AbstractCegarLoop]: Interpolant automaton has 75 states [2021-07-13 20:16:02,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:16:02,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-07-13 20:16:02,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=5403, Unknown=0, NotChecked=0, Total=5550 [2021-07-13 20:16:02,105 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) [2021-07-13 20:16:10,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:16:10,093 INFO L93 Difference]: Finished difference Result 4519 states and 8955 transitions. [2021-07-13 20:16:10,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-07-13 20:16:10,094 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 [2021-07-13 20:16:10,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:16:10,097 INFO L225 Difference]: With dead ends: 4519 [2021-07-13 20:16:10,097 INFO L226 Difference]: Without dead ends: 2895 [2021-07-13 20:16:10,097 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 79 SyntacticMatches, 2 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2556 ImplicationChecksByTransitivity, 8316.5ms TimeCoverageRelationStatistics Valid=2955, Invalid=18507, Unknown=0, NotChecked=0, Total=21462 [2021-07-13 20:16:10,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2895 states. [2021-07-13 20:16:10,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2895 to 196. [2021-07-13 20:16:10,106 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) [2021-07-13 20:16:10,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 386 transitions. [2021-07-13 20:16:10,106 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 386 transitions. Word has length 81 [2021-07-13 20:16:10,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:16:10,106 INFO L482 AbstractCegarLoop]: Abstraction has 196 states and 386 transitions. [2021-07-13 20:16:10,106 INFO L483 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) [2021-07-13 20:16:10,106 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 386 transitions. [2021-07-13 20:16:10,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-07-13 20:16:10,107 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:16:10,107 INFO L508 BasicCegarLoop]: trace histogram [37, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:16:10,320 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-07-13 20:16:10,321 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:16:10,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:16:10,321 INFO L82 PathProgramCache]: Analyzing trace with hash 466171639, now seen corresponding path program 67 times [2021-07-13 20:16:10,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:16:10,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053027122] [2021-07-13 20:16:10,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:16:10,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:16:10,823 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 703 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:16:10,823 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:16:10,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053027122] [2021-07-13 20:16:10,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053027122] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:10,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087303718] [2021-07-13 20:16:10,824 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 [2021-07-13 20:16:10,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:16:10,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 74 conjunts are in the unsatisfiable core [2021-07-13 20:16:10,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:16:11,009 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 703 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:16:11,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087303718] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:11,010 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:16:11,010 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38] total 39 [2021-07-13 20:16:11,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39238958] [2021-07-13 20:16:11,010 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-07-13 20:16:11,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:16:11,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-07-13 20:16:11,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 20:16:11,010 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) [2021-07-13 20:16:11,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:16:11,140 INFO L93 Difference]: Finished difference Result 2640 states and 5157 transitions. [2021-07-13 20:16:11,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-13 20:16:11,140 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 [2021-07-13 20:16:11,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:16:11,143 INFO L225 Difference]: With dead ends: 2640 [2021-07-13 20:16:11,143 INFO L226 Difference]: Without dead ends: 2565 [2021-07-13 20:16:11,143 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 466.9ms TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 20:16:11,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2565 states. [2021-07-13 20:16:11,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2565 to 2343. [2021-07-13 20:16:11,167 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) [2021-07-13 20:16:11,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2343 states to 2343 states and 4787 transitions. [2021-07-13 20:16:11,169 INFO L78 Accepts]: Start accepts. Automaton has 2343 states and 4787 transitions. Word has length 82 [2021-07-13 20:16:11,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:16:11,169 INFO L482 AbstractCegarLoop]: Abstraction has 2343 states and 4787 transitions. [2021-07-13 20:16:11,169 INFO L483 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) [2021-07-13 20:16:11,169 INFO L276 IsEmpty]: Start isEmpty. Operand 2343 states and 4787 transitions. [2021-07-13 20:16:11,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-07-13 20:16:11,171 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:16:11,171 INFO L508 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:16:11,387 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:16:11,387 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:16:11,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:16:11,387 INFO L82 PathProgramCache]: Analyzing trace with hash 971852738, now seen corresponding path program 68 times [2021-07-13 20:16:11,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:16:11,387 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348345563] [2021-07-13 20:16:11,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:16:11,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:16:13,563 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:16:13,563 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:16:13,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348345563] [2021-07-13 20:16:13,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348345563] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:13,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914826827] [2021-07-13 20:16:13,563 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 [2021-07-13 20:16:13,614 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:16:13,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:16:13,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 151 conjunts are in the unsatisfiable core [2021-07-13 20:16:13,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:16:13,756 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 [2021-07-13 20:16:13,757 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:16:13,758 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:16:13,758 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:16:13,758 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-07-13 20:16:13,763 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:16:13,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914826827] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:13,763 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:16:13,763 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 76 [2021-07-13 20:16:13,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566584418] [2021-07-13 20:16:13,763 INFO L462 AbstractCegarLoop]: Interpolant automaton has 77 states [2021-07-13 20:16:13,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:16:13,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2021-07-13 20:16:13,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=5701, Unknown=0, NotChecked=0, Total=5852 [2021-07-13 20:16:13,764 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) [2021-07-13 20:16:21,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:16:21,997 INFO L93 Difference]: Finished difference Result 4755 states and 9425 transitions. [2021-07-13 20:16:21,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-07-13 20:16:21,998 INFO L78 Accepts]: Start accepts. Automaton has 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) Word has length 83 [2021-07-13 20:16:21,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:16:22,001 INFO L225 Difference]: With dead ends: 4755 [2021-07-13 20:16:22,001 INFO L226 Difference]: Without dead ends: 3049 [2021-07-13 20:16:22,002 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 81 SyntacticMatches, 2 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2701 ImplicationChecksByTransitivity, 8566.1ms TimeCoverageRelationStatistics Valid=3111, Invalid=19539, Unknown=0, NotChecked=0, Total=22650 [2021-07-13 20:16:22,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3049 states. [2021-07-13 20:16:22,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3049 to 201. [2021-07-13 20:16:22,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 1.98) internal successors, (396), 200 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:22,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 396 transitions. [2021-07-13 20:16:22,010 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 396 transitions. Word has length 83 [2021-07-13 20:16:22,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:16:22,011 INFO L482 AbstractCegarLoop]: Abstraction has 201 states and 396 transitions. [2021-07-13 20:16:22,011 INFO L483 AbstractCegarLoop]: Interpolant automaton has 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) [2021-07-13 20:16:22,011 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 396 transitions. [2021-07-13 20:16:22,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-07-13 20:16:22,011 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:16:22,011 INFO L508 BasicCegarLoop]: trace histogram [38, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:16:22,211 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-07-13 20:16:22,212 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:16:22,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:16:22,212 INFO L82 PathProgramCache]: Analyzing trace with hash 85734507, now seen corresponding path program 69 times [2021-07-13 20:16:22,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:16:22,212 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397701234] [2021-07-13 20:16:22,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:16:22,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:16:22,756 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 741 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:16:22,756 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:16:22,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397701234] [2021-07-13 20:16:22,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397701234] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:22,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520810604] [2021-07-13 20:16:22,757 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 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:16:22,822 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2021-07-13 20:16:22,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:16:22,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 76 conjunts are in the unsatisfiable core [2021-07-13 20:16:22,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:16:22,968 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 741 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:16:22,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520810604] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:22,968 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:16:22,968 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39] total 40 [2021-07-13 20:16:22,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568958200] [2021-07-13 20:16:22,969 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-07-13 20:16:22,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:16:22,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-07-13 20:16:22,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 20:16:22,969 INFO L87 Difference]: Start difference. First operand 201 states and 396 transitions. Second operand has 41 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 40 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:23,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:16:23,095 INFO L93 Difference]: Finished difference Result 2768 states and 5410 transitions. [2021-07-13 20:16:23,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-13 20:16:23,095 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 40 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2021-07-13 20:16:23,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:16:23,099 INFO L225 Difference]: With dead ends: 2768 [2021-07-13 20:16:23,099 INFO L226 Difference]: Without dead ends: 2691 [2021-07-13 20:16:23,099 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 504.6ms TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 20:16:23,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2691 states. [2021-07-13 20:16:23,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2691 to 2463. [2021-07-13 20:16:23,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2463 states, 2462 states have (on average 2.0430544272948823) internal successors, (5030), 2462 states have internal predecessors, (5030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:23,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2463 states to 2463 states and 5030 transitions. [2021-07-13 20:16:23,131 INFO L78 Accepts]: Start accepts. Automaton has 2463 states and 5030 transitions. Word has length 84 [2021-07-13 20:16:23,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:16:23,131 INFO L482 AbstractCegarLoop]: Abstraction has 2463 states and 5030 transitions. [2021-07-13 20:16:23,131 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 40 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:23,131 INFO L276 IsEmpty]: Start isEmpty. Operand 2463 states and 5030 transitions. [2021-07-13 20:16:23,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-07-13 20:16:23,134 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:16:23,134 INFO L508 BasicCegarLoop]: trace histogram [38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:16:23,335 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:16:23,335 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:16:23,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:16:23,336 INFO L82 PathProgramCache]: Analyzing trace with hash 713966198, now seen corresponding path program 70 times [2021-07-13 20:16:23,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:16:23,336 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833851945] [2021-07-13 20:16:23,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:16:23,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:16:25,627 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:16:25,627 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:16:25,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833851945] [2021-07-13 20:16:25,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833851945] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:25,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056377351] [2021-07-13 20:16:25,627 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 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:16:25,687 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:16:25,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:16:25,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 155 conjunts are in the unsatisfiable core [2021-07-13 20:16:25,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:16:25,822 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 [2021-07-13 20:16:25,823 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:16:25,824 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:16:25,824 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:16:25,824 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-07-13 20:16:25,829 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:16:25,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056377351] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:25,829 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:16:25,829 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 78 [2021-07-13 20:16:25,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509372681] [2021-07-13 20:16:25,829 INFO L462 AbstractCegarLoop]: Interpolant automaton has 79 states [2021-07-13 20:16:25,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:16:25,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2021-07-13 20:16:25,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=6007, Unknown=0, NotChecked=0, Total=6162 [2021-07-13 20:16:25,830 INFO L87 Difference]: Start difference. First operand 2463 states and 5030 transitions. Second operand has 79 states, 79 states have (on average 1.0759493670886076) internal successors, (85), 78 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) [2021-07-13 20:16:34,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:16:34,644 INFO L93 Difference]: Finished difference Result 4997 states and 9907 transitions. [2021-07-13 20:16:34,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-07-13 20:16:34,644 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 1.0759493670886076) internal successors, (85), 78 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 85 [2021-07-13 20:16:34,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:16:34,648 INFO L225 Difference]: With dead ends: 4997 [2021-07-13 20:16:34,648 INFO L226 Difference]: Without dead ends: 3207 [2021-07-13 20:16:34,649 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 83 SyntacticMatches, 2 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2850 ImplicationChecksByTransitivity, 9128.4ms TimeCoverageRelationStatistics Valid=3271, Invalid=20599, Unknown=0, NotChecked=0, Total=23870 [2021-07-13 20:16:34,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3207 states. [2021-07-13 20:16:34,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3207 to 206. [2021-07-13 20:16:34,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 205 states have (on average 1.9804878048780488) internal successors, (406), 205 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:34,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 406 transitions. [2021-07-13 20:16:34,659 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 406 transitions. Word has length 85 [2021-07-13 20:16:34,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:16:34,659 INFO L482 AbstractCegarLoop]: Abstraction has 206 states and 406 transitions. [2021-07-13 20:16:34,659 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 79 states, 79 states have (on average 1.0759493670886076) internal successors, (85), 78 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) [2021-07-13 20:16:34,660 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 406 transitions. [2021-07-13 20:16:34,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-07-13 20:16:34,660 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:16:34,660 INFO L508 BasicCegarLoop]: trace histogram [39, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:16:34,860 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2021-07-13 20:16:34,861 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:16:34,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:16:34,861 INFO L82 PathProgramCache]: Analyzing trace with hash 681186359, now seen corresponding path program 71 times [2021-07-13 20:16:34,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:16:34,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089127566] [2021-07-13 20:16:34,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:16:34,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:16:35,421 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 780 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:16:35,421 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:16:35,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089127566] [2021-07-13 20:16:35,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089127566] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:35,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347963452] [2021-07-13 20:16:35,422 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 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:16:35,499 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2021-07-13 20:16:35,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:16:35,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 78 conjunts are in the unsatisfiable core [2021-07-13 20:16:35,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:16:35,665 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 780 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:16:35,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347963452] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:35,665 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:16:35,665 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40] total 41 [2021-07-13 20:16:35,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681302339] [2021-07-13 20:16:35,666 INFO L462 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-07-13 20:16:35,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:16:35,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-07-13 20:16:35,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 20:16:35,666 INFO L87 Difference]: Start difference. First operand 206 states and 406 transitions. Second operand has 42 states, 42 states have (on average 2.119047619047619) internal successors, (89), 41 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:35,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:16:35,798 INFO L93 Difference]: Finished difference Result 2899 states and 5669 transitions. [2021-07-13 20:16:35,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-13 20:16:35,799 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.119047619047619) internal successors, (89), 41 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-07-13 20:16:35,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:16:35,802 INFO L225 Difference]: With dead ends: 2899 [2021-07-13 20:16:35,802 INFO L226 Difference]: Without dead ends: 2820 [2021-07-13 20:16:35,802 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 521.3ms TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 20:16:35,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2820 states. [2021-07-13 20:16:35,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2820 to 2586. [2021-07-13 20:16:35,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2586 states, 2585 states have (on average 2.042166344294004) internal successors, (5279), 2585 states have internal predecessors, (5279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:35,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2586 states to 2586 states and 5279 transitions. [2021-07-13 20:16:35,825 INFO L78 Accepts]: Start accepts. Automaton has 2586 states and 5279 transitions. Word has length 86 [2021-07-13 20:16:35,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:16:35,825 INFO L482 AbstractCegarLoop]: Abstraction has 2586 states and 5279 transitions. [2021-07-13 20:16:35,825 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 2.119047619047619) internal successors, (89), 41 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:35,825 INFO L276 IsEmpty]: Start isEmpty. Operand 2586 states and 5279 transitions. [2021-07-13 20:16:35,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-07-13 20:16:35,827 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:16:35,827 INFO L508 BasicCegarLoop]: trace histogram [39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:16:36,028 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:16:36,028 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:16:36,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:16:36,028 INFO L82 PathProgramCache]: Analyzing trace with hash -1178547326, now seen corresponding path program 72 times [2021-07-13 20:16:36,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:16:36,028 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845519452] [2021-07-13 20:16:36,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:16:36,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:16:38,414 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:16:38,414 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:16:38,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845519452] [2021-07-13 20:16:38,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845519452] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:38,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553017302] [2021-07-13 20:16:38,415 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 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:16:38,482 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2021-07-13 20:16:38,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:16:38,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 84 conjunts are in the unsatisfiable core [2021-07-13 20:16:38,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:16:45,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:16:45,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 20:16:45,586 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:16:45,589 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:16:45,590 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:16:45,590 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:19, output treesize:3 [2021-07-13 20:16:45,594 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 741 proven. 819 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:16:45,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553017302] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:45,595 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:16:45,595 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 158 [2021-07-13 20:16:45,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752583997] [2021-07-13 20:16:45,595 INFO L462 AbstractCegarLoop]: Interpolant automaton has 159 states [2021-07-13 20:16:45,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:16:45,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 159 interpolants. [2021-07-13 20:16:45,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3318, Invalid=21804, Unknown=0, NotChecked=0, Total=25122 [2021-07-13 20:16:45,596 INFO L87 Difference]: Start difference. First operand 2586 states and 5279 transitions. Second operand has 159 states, 159 states have (on average 1.0628930817610063) internal successors, (169), 158 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:49,442 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 105 [2021-07-13 20:16:49,695 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 109 [2021-07-13 20:16:49,960 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 113 [2021-07-13 20:16:50,332 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 117 [2021-07-13 20:16:50,614 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 121 [2021-07-13 20:16:50,899 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 125 [2021-07-13 20:16:51,200 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 129 [2021-07-13 20:16:51,506 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 128 [2021-07-13 20:16:51,811 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 137 [2021-07-13 20:16:52,141 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 141 [2021-07-13 20:16:52,466 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 145 [2021-07-13 20:16:52,807 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 149 [2021-07-13 20:16:53,119 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 148 [2021-07-13 20:16:53,451 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 152 [2021-07-13 20:16:53,808 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 156 [2021-07-13 20:16:54,148 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 160 [2021-07-13 20:16:54,896 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2021-07-13 20:20:52,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:20:52,803 INFO L93 Difference]: Finished difference Result 43429 states and 85946 transitions. [2021-07-13 20:20:52,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 940 states. [2021-07-13 20:20:52,804 INFO L78 Accepts]: Start accepts. Automaton has has 159 states, 159 states have (on average 1.0628930817610063) internal successors, (169), 158 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 87 [2021-07-13 20:20:52,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:20:52,858 INFO L225 Difference]: With dead ends: 43429 [2021-07-13 20:20:52,858 INFO L226 Difference]: Without dead ends: 35000 [2021-07-13 20:20:52,929 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 1064 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1055 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431709 ImplicationChecksByTransitivity, 235945.6ms TimeCoverageRelationStatistics Valid=188064, Invalid=928128, Unknown=0, NotChecked=0, Total=1116192 [2021-07-13 20:20:52,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35000 states. [2021-07-13 20:20:53,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35000 to 2630. [2021-07-13 20:20:53,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2630 states, 2629 states have (on average 2.0422213769494104) internal successors, (5369), 2629 states have internal predecessors, (5369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:53,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2630 states to 2630 states and 5369 transitions. [2021-07-13 20:20:53,113 INFO L78 Accepts]: Start accepts. Automaton has 2630 states and 5369 transitions. Word has length 87 [2021-07-13 20:20:53,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:20:53,113 INFO L482 AbstractCegarLoop]: Abstraction has 2630 states and 5369 transitions. [2021-07-13 20:20:53,113 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 159 states, 159 states have (on average 1.0628930817610063) internal successors, (169), 158 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:53,113 INFO L276 IsEmpty]: Start isEmpty. Operand 2630 states and 5369 transitions. [2021-07-13 20:20:53,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-07-13 20:20:53,115 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:20:53,116 INFO L508 BasicCegarLoop]: trace histogram [40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:20:53,316 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:20:53,316 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:20:53,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:20:53,316 INFO L82 PathProgramCache]: Analyzing trace with hash 1645133110, now seen corresponding path program 73 times [2021-07-13 20:20:53,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:20:53,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865148421] [2021-07-13 20:20:53,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:20:53,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:20:55,925 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:55,926 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:20:55,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865148421] [2021-07-13 20:20:55,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865148421] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:55,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837545687] [2021-07-13 20:20:55,926 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 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:20:55,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:20:55,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 163 conjunts are in the unsatisfiable core [2021-07-13 20:20:55,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:20:56,139 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 [2021-07-13 20:20:56,140 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:20:56,141 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:20:56,141 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:20:56,141 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-07-13 20:20:56,147 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:56,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837545687] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:56,147 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:20:56,147 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 82 [2021-07-13 20:20:56,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691374148] [2021-07-13 20:20:56,147 INFO L462 AbstractCegarLoop]: Interpolant automaton has 83 states [2021-07-13 20:20:56,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:20:56,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2021-07-13 20:20:56,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=6643, Unknown=0, NotChecked=0, Total=6806 [2021-07-13 20:20:56,148 INFO L87 Difference]: Start difference. First operand 2630 states and 5369 transitions. Second operand has 83 states, 83 states have (on average 1.072289156626506) internal successors, (89), 82 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:01,234 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2021-07-13 20:21:06,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:21:06,196 INFO L93 Difference]: Finished difference Result 5413 states and 10738 transitions. [2021-07-13 20:21:06,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-07-13 20:21:06,197 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 1.072289156626506) internal successors, (89), 82 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2021-07-13 20:21:06,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:21:06,260 INFO L225 Difference]: With dead ends: 5413 [2021-07-13 20:21:06,260 INFO L226 Difference]: Without dead ends: 3533 [2021-07-13 20:21:06,261 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 87 SyntacticMatches, 2 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3160 ImplicationChecksByTransitivity, 10492.4ms TimeCoverageRelationStatistics Valid=3603, Invalid=22803, Unknown=0, NotChecked=0, Total=26406 [2021-07-13 20:21:06,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3533 states. [2021-07-13 20:21:06,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3533 to 216. [2021-07-13 20:21:06,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 1.9813953488372094) internal successors, (426), 215 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:06,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 426 transitions. [2021-07-13 20:21:06,271 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 426 transitions. Word has length 89 [2021-07-13 20:21:06,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:21:06,271 INFO L482 AbstractCegarLoop]: Abstraction has 216 states and 426 transitions. [2021-07-13 20:21:06,271 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 83 states, 83 states have (on average 1.072289156626506) internal successors, (89), 82 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:06,271 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 426 transitions. [2021-07-13 20:21:06,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-07-13 20:21:06,271 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:21:06,271 INFO L508 BasicCegarLoop]: trace histogram [41, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:21:06,472 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:21:06,472 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:21:06,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:21:06,472 INFO L82 PathProgramCache]: Analyzing trace with hash -517410441, now seen corresponding path program 74 times [2021-07-13 20:21:06,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:21:06,472 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966758212] [2021-07-13 20:21:06,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:21:06,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:21:07,084 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 861 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:07,084 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:21:07,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966758212] [2021-07-13 20:21:07,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966758212] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:07,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174575567] [2021-07-13 20:21:07,084 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 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:21:07,134 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:21:07,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:21:07,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 82 conjunts are in the unsatisfiable core [2021-07-13 20:21:07,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:21:07,288 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 861 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:07,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174575567] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:07,289 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:21:07,289 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42] total 43 [2021-07-13 20:21:07,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876470853] [2021-07-13 20:21:07,289 INFO L462 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-07-13 20:21:07,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:21:07,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-07-13 20:21:07,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 20:21:07,290 INFO L87 Difference]: Start difference. First operand 216 states and 426 transitions. Second operand has 44 states, 44 states have (on average 2.1136363636363638) internal successors, (93), 43 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:07,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:21:07,447 INFO L93 Difference]: Finished difference Result 3170 states and 6205 transitions. [2021-07-13 20:21:07,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-13 20:21:07,448 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.1136363636363638) internal successors, (93), 43 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-07-13 20:21:07,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:21:07,452 INFO L225 Difference]: With dead ends: 3170 [2021-07-13 20:21:07,452 INFO L226 Difference]: Without dead ends: 3087 [2021-07-13 20:21:07,452 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 568.0ms TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 20:21:07,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3087 states. [2021-07-13 20:21:07,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3087 to 2841. [2021-07-13 20:21:07,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2841 states, 2840 states have (on average 2.040492957746479) internal successors, (5795), 2840 states have internal predecessors, (5795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:07,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2841 states to 2841 states and 5795 transitions. [2021-07-13 20:21:07,488 INFO L78 Accepts]: Start accepts. Automaton has 2841 states and 5795 transitions. Word has length 90 [2021-07-13 20:21:07,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:21:07,488 INFO L482 AbstractCegarLoop]: Abstraction has 2841 states and 5795 transitions. [2021-07-13 20:21:07,488 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 44 states, 44 states have (on average 2.1136363636363638) internal successors, (93), 43 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:07,488 INFO L276 IsEmpty]: Start isEmpty. Operand 2841 states and 5795 transitions. [2021-07-13 20:21:07,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-07-13 20:21:07,490 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:21:07,490 INFO L508 BasicCegarLoop]: trace histogram [41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:21:07,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2021-07-13 20:21:07,705 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:21:07,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:21:07,705 INFO L82 PathProgramCache]: Analyzing trace with hash -2042819774, now seen corresponding path program 75 times [2021-07-13 20:21:07,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:21:07,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127161973] [2021-07-13 20:21:07,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:21:07,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:21:10,397 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:10,397 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:21:10,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127161973] [2021-07-13 20:21:10,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127161973] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:10,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57465282] [2021-07-13 20:21:10,397 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 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:21:10,465 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2021-07-13 20:21:10,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:21:10,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 167 conjunts are in the unsatisfiable core [2021-07-13 20:21:10,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:21:10,622 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 [2021-07-13 20:21:10,623 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:21:10,624 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:21:10,624 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:21:10,624 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-07-13 20:21:10,628 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:10,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57465282] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:10,628 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:21:10,628 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 84 [2021-07-13 20:21:10,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929100011] [2021-07-13 20:21:10,629 INFO L462 AbstractCegarLoop]: Interpolant automaton has 85 states [2021-07-13 20:21:10,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:21:10,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2021-07-13 20:21:10,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=6973, Unknown=0, NotChecked=0, Total=7140 [2021-07-13 20:21:10,630 INFO L87 Difference]: Start difference. First operand 2841 states and 5795 transitions. Second operand has 85 states, 85 states have (on average 1.0705882352941176) internal successors, (91), 84 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:21,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:21:21,199 INFO L93 Difference]: Finished difference Result 5759 states and 11425 transitions. [2021-07-13 20:21:21,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-07-13 20:21:21,199 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 1.0705882352941176) internal successors, (91), 84 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2021-07-13 20:21:21,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:21:21,204 INFO L225 Difference]: With dead ends: 5759 [2021-07-13 20:21:21,204 INFO L226 Difference]: Without dead ends: 3705 [2021-07-13 20:21:21,205 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 89 SyntacticMatches, 2 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3321 ImplicationChecksByTransitivity, 11021.9ms TimeCoverageRelationStatistics Valid=3775, Invalid=23947, Unknown=0, NotChecked=0, Total=27722 [2021-07-13 20:21:21,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3705 states. [2021-07-13 20:21:21,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3705 to 221. [2021-07-13 20:21:21,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 1.981818181818182) internal successors, (436), 220 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:21,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 436 transitions. [2021-07-13 20:21:21,217 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 436 transitions. Word has length 91 [2021-07-13 20:21:21,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:21:21,217 INFO L482 AbstractCegarLoop]: Abstraction has 221 states and 436 transitions. [2021-07-13 20:21:21,217 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 85 states, 85 states have (on average 1.0705882352941176) internal successors, (91), 84 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:21,217 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 436 transitions. [2021-07-13 20:21:21,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-07-13 20:21:21,218 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:21:21,218 INFO L508 BasicCegarLoop]: trace histogram [42, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:21:21,418 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:21:21,418 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:21:21,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:21:21,419 INFO L82 PathProgramCache]: Analyzing trace with hash 1120167147, now seen corresponding path program 76 times [2021-07-13 20:21:21,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:21:21,419 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015417172] [2021-07-13 20:21:21,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:21:21,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:21:22,053 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 903 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:22,054 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:21:22,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015417172] [2021-07-13 20:21:22,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015417172] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:22,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006276310] [2021-07-13 20:21:22,054 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 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:21:22,103 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:21:22,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:21:22,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 84 conjunts are in the unsatisfiable core [2021-07-13 20:21:22,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:21:22,263 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 903 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:22,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006276310] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:22,263 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:21:22,263 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 43] total 44 [2021-07-13 20:21:22,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453178582] [2021-07-13 20:21:22,263 INFO L462 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-07-13 20:21:22,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:21:22,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-07-13 20:21:22,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2021-07-13 20:21:22,264 INFO L87 Difference]: Start difference. First operand 221 states and 436 transitions. Second operand has 45 states, 45 states have (on average 2.111111111111111) internal successors, (95), 44 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) [2021-07-13 20:21:22,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:21:22,477 INFO L93 Difference]: Finished difference Result 3310 states and 6482 transitions. [2021-07-13 20:21:22,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-13 20:21:22,478 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.111111111111111) internal successors, (95), 44 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) Word has length 92 [2021-07-13 20:21:22,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:21:22,481 INFO L225 Difference]: With dead ends: 3310 [2021-07-13 20:21:22,481 INFO L226 Difference]: Without dead ends: 3225 [2021-07-13 20:21:22,481 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 592.4ms TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2021-07-13 20:21:22,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3225 states. [2021-07-13 20:21:22,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3225 to 2973. [2021-07-13 20:21:22,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2973 states, 2972 states have (on average 2.0397039030955586) internal successors, (6062), 2972 states have internal predecessors, (6062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:22,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2973 states to 2973 states and 6062 transitions. [2021-07-13 20:21:22,506 INFO L78 Accepts]: Start accepts. Automaton has 2973 states and 6062 transitions. Word has length 92 [2021-07-13 20:21:22,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:21:22,507 INFO L482 AbstractCegarLoop]: Abstraction has 2973 states and 6062 transitions. [2021-07-13 20:21:22,507 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 45 states, 45 states have (on average 2.111111111111111) internal successors, (95), 44 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) [2021-07-13 20:21:22,507 INFO L276 IsEmpty]: Start isEmpty. Operand 2973 states and 6062 transitions. [2021-07-13 20:21:22,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-07-13 20:21:22,509 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:21:22,509 INFO L508 BasicCegarLoop]: trace histogram [42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:21:22,725 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:21:22,725 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:21:22,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:21:22,725 INFO L82 PathProgramCache]: Analyzing trace with hash -214353930, now seen corresponding path program 77 times [2021-07-13 20:21:22,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:21:22,725 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600935644] [2021-07-13 20:21:22,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:21:22,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:21:25,521 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:25,521 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:21:25,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600935644] [2021-07-13 20:21:25,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600935644] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:25,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099740947] [2021-07-13 20:21:25,522 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 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:21:25,606 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2021-07-13 20:21:25,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:21:25,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 171 conjunts are in the unsatisfiable core [2021-07-13 20:21:25,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:21:25,767 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 [2021-07-13 20:21:25,767 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:21:25,769 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:21:25,769 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:21:25,769 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-07-13 20:21:25,774 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:25,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099740947] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:25,774 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:21:25,774 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 86 [2021-07-13 20:21:25,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809759252] [2021-07-13 20:21:25,775 INFO L462 AbstractCegarLoop]: Interpolant automaton has 87 states [2021-07-13 20:21:25,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:21:25,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2021-07-13 20:21:25,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=7311, Unknown=0, NotChecked=0, Total=7482 [2021-07-13 20:21:25,775 INFO L87 Difference]: Start difference. First operand 2973 states and 6062 transitions. Second operand has 87 states, 87 states have (on average 1.0689655172413792) internal successors, (93), 86 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:31,327 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2021-07-13 20:21:36,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:21:36,814 INFO L93 Difference]: Finished difference Result 6025 states and 11955 transitions. [2021-07-13 20:21:36,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-07-13 20:21:36,815 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 1.0689655172413792) internal successors, (93), 86 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2021-07-13 20:21:36,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:21:36,819 INFO L225 Difference]: With dead ends: 6025 [2021-07-13 20:21:36,819 INFO L226 Difference]: Without dead ends: 3879 [2021-07-13 20:21:36,820 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 91 SyntacticMatches, 2 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3486 ImplicationChecksByTransitivity, 11494.5ms TimeCoverageRelationStatistics Valid=3951, Invalid=25119, Unknown=0, NotChecked=0, Total=29070 [2021-07-13 20:21:36,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3879 states. [2021-07-13 20:21:36,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3879 to 226. [2021-07-13 20:21:36,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 1.9822222222222223) internal successors, (446), 225 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:36,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 446 transitions. [2021-07-13 20:21:36,833 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 446 transitions. Word has length 93 [2021-07-13 20:21:36,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:21:36,833 INFO L482 AbstractCegarLoop]: Abstraction has 226 states and 446 transitions. [2021-07-13 20:21:36,833 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 87 states, 87 states have (on average 1.0689655172413792) internal successors, (93), 86 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:36,833 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 446 transitions. [2021-07-13 20:21:36,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-07-13 20:21:36,834 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:21:36,834 INFO L508 BasicCegarLoop]: trace histogram [43, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:21:37,034 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-07-13 20:21:37,034 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:21:37,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:21:37,035 INFO L82 PathProgramCache]: Analyzing trace with hash 1968033463, now seen corresponding path program 78 times [2021-07-13 20:21:37,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:21:37,035 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234726394] [2021-07-13 20:21:37,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:21:37,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:21:37,705 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 946 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:37,705 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:21:37,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234726394] [2021-07-13 20:21:37,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234726394] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:37,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205401631] [2021-07-13 20:21:37,705 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 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:21:37,776 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2021-07-13 20:21:37,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:21:37,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 86 conjunts are in the unsatisfiable core [2021-07-13 20:21:37,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:21:37,943 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 946 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:37,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205401631] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:37,944 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:21:37,944 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44] total 45 [2021-07-13 20:21:37,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584656632] [2021-07-13 20:21:37,944 INFO L462 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-07-13 20:21:37,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:21:37,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-07-13 20:21:37,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 20:21:37,945 INFO L87 Difference]: Start difference. First operand 226 states and 446 transitions. Second operand has 46 states, 46 states have (on average 2.108695652173913) internal successors, (97), 45 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:38,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:21:38,105 INFO L93 Difference]: Finished difference Result 3453 states and 6765 transitions. [2021-07-13 20:21:38,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-07-13 20:21:38,106 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.108695652173913) internal successors, (97), 45 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2021-07-13 20:21:38,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:21:38,109 INFO L225 Difference]: With dead ends: 3453 [2021-07-13 20:21:38,109 INFO L226 Difference]: Without dead ends: 3366 [2021-07-13 20:21:38,109 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 627.1ms TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 20:21:38,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3366 states. [2021-07-13 20:21:38,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3366 to 3108. [2021-07-13 20:21:38,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3108 states, 3107 states have (on average 2.0389443192790475) internal successors, (6335), 3107 states have internal predecessors, (6335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:38,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3108 states to 3108 states and 6335 transitions. [2021-07-13 20:21:38,135 INFO L78 Accepts]: Start accepts. Automaton has 3108 states and 6335 transitions. Word has length 94 [2021-07-13 20:21:38,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:21:38,136 INFO L482 AbstractCegarLoop]: Abstraction has 3108 states and 6335 transitions. [2021-07-13 20:21:38,136 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 46 states, 46 states have (on average 2.108695652173913) internal successors, (97), 45 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:38,136 INFO L276 IsEmpty]: Start isEmpty. Operand 3108 states and 6335 transitions. [2021-07-13 20:21:38,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-07-13 20:21:38,139 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:21:38,139 INFO L508 BasicCegarLoop]: trace histogram [43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:21:38,339 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-07-13 20:21:38,339 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:21:38,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:21:38,340 INFO L82 PathProgramCache]: Analyzing trace with hash -606467326, now seen corresponding path program 79 times [2021-07-13 20:21:38,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:21:38,340 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421296773] [2021-07-13 20:21:38,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:21:38,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:21:41,227 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:41,227 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:21:41,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421296773] [2021-07-13 20:21:41,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421296773] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:41,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751236236] [2021-07-13 20:21:41,228 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 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:21:41,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:21:41,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 175 conjunts are in the unsatisfiable core [2021-07-13 20:21:41,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:21:41,423 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 [2021-07-13 20:21:41,424 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:21:41,425 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:21:41,425 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:21:41,425 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-07-13 20:21:41,431 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:41,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751236236] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:41,431 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:21:41,431 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88] total 88 [2021-07-13 20:21:41,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135552456] [2021-07-13 20:21:41,431 INFO L462 AbstractCegarLoop]: Interpolant automaton has 89 states [2021-07-13 20:21:41,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:21:41,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2021-07-13 20:21:41,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=7657, Unknown=0, NotChecked=0, Total=7832 [2021-07-13 20:21:41,432 INFO L87 Difference]: Start difference. First operand 3108 states and 6335 transitions. Second operand has 89 states, 89 states have (on average 1.0674157303370786) internal successors, (95), 88 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) [2021-07-13 20:21:47,448 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 176 [2021-07-13 20:21:53,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:21:53,061 INFO L93 Difference]: Finished difference Result 6297 states and 12497 transitions. [2021-07-13 20:21:53,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-07-13 20:21:53,061 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 1.0674157303370786) internal successors, (95), 88 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) Word has length 95 [2021-07-13 20:21:53,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:21:53,065 INFO L225 Difference]: With dead ends: 6297 [2021-07-13 20:21:53,066 INFO L226 Difference]: Without dead ends: 4057 [2021-07-13 20:21:53,066 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 93 SyntacticMatches, 2 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3655 ImplicationChecksByTransitivity, 12039.2ms TimeCoverageRelationStatistics Valid=4131, Invalid=26319, Unknown=0, NotChecked=0, Total=30450 [2021-07-13 20:21:53,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4057 states. [2021-07-13 20:21:53,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4057 to 231. [2021-07-13 20:21:53,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 230 states have (on average 1.982608695652174) internal successors, (456), 230 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:53,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 456 transitions. [2021-07-13 20:21:53,078 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 456 transitions. Word has length 95 [2021-07-13 20:21:53,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:21:53,078 INFO L482 AbstractCegarLoop]: Abstraction has 231 states and 456 transitions. [2021-07-13 20:21:53,078 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 89 states, 89 states have (on average 1.0674157303370786) internal successors, (95), 88 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) [2021-07-13 20:21:53,078 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 456 transitions. [2021-07-13 20:21:53,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-07-13 20:21:53,079 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:21:53,079 INFO L508 BasicCegarLoop]: trace histogram [44, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:21:53,279 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:21:53,280 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:21:53,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:21:53,280 INFO L82 PathProgramCache]: Analyzing trace with hash -1597547221, now seen corresponding path program 80 times [2021-07-13 20:21:53,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:21:53,280 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449830607] [2021-07-13 20:21:53,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:21:53,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:21:53,966 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 990 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:53,966 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:21:53,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449830607] [2021-07-13 20:21:53,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449830607] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:53,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26127360] [2021-07-13 20:21:53,966 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 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:21:54,023 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:21:54,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:21:54,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 88 conjunts are in the unsatisfiable core [2021-07-13 20:21:54,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:21:54,186 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 990 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:54,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26127360] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:54,186 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:21:54,186 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 45] total 46 [2021-07-13 20:21:54,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118740959] [2021-07-13 20:21:54,186 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-07-13 20:21:54,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:21:54,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-07-13 20:21:54,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 20:21:54,187 INFO L87 Difference]: Start difference. First operand 231 states and 456 transitions. Second operand has 47 states, 47 states have (on average 2.106382978723404) internal successors, (99), 46 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:54,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:21:54,355 INFO L93 Difference]: Finished difference Result 3599 states and 7054 transitions. [2021-07-13 20:21:54,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-13 20:21:54,356 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.106382978723404) internal successors, (99), 46 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-07-13 20:21:54,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:21:54,360 INFO L225 Difference]: With dead ends: 3599 [2021-07-13 20:21:54,360 INFO L226 Difference]: Without dead ends: 3510 [2021-07-13 20:21:54,360 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 643.8ms TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 20:21:54,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3510 states. [2021-07-13 20:21:54,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3510 to 3246. [2021-07-13 20:21:54,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3246 states, 3245 states have (on average 2.0382126348228042) internal successors, (6614), 3245 states have internal predecessors, (6614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:54,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3246 states to 3246 states and 6614 transitions. [2021-07-13 20:21:54,389 INFO L78 Accepts]: Start accepts. Automaton has 3246 states and 6614 transitions. Word has length 96 [2021-07-13 20:21:54,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:21:54,389 INFO L482 AbstractCegarLoop]: Abstraction has 3246 states and 6614 transitions. [2021-07-13 20:21:54,389 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 2.106382978723404) internal successors, (99), 46 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:54,389 INFO L276 IsEmpty]: Start isEmpty. Operand 3246 states and 6614 transitions. [2021-07-13 20:21:54,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-07-13 20:21:54,392 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:21:54,392 INFO L508 BasicCegarLoop]: trace histogram [44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:21:54,592 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:21:54,592 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:21:54,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:21:54,593 INFO L82 PathProgramCache]: Analyzing trace with hash -1791642954, now seen corresponding path program 81 times [2021-07-13 20:21:54,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:21:54,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424970839] [2021-07-13 20:21:54,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:21:54,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:21:57,611 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:57,611 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:21:57,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424970839] [2021-07-13 20:21:57,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424970839] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:57,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214569938] [2021-07-13 20:21:57,612 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 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:21:57,719 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2021-07-13 20:21:57,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:21:57,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 94 conjunts are in the unsatisfiable core [2021-07-13 20:21:57,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:22:06,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:22:06,826 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 [2021-07-13 20:22:06,827 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:22:06,830 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:22:06,831 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:22:06,831 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:19, output treesize:3 [2021-07-13 20:22:06,835 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 946 proven. 1034 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:06,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214569938] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:06,835 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:22:06,836 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90] total 178 [2021-07-13 20:22:06,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655481534] [2021-07-13 20:22:06,836 INFO L462 AbstractCegarLoop]: Interpolant automaton has 179 states [2021-07-13 20:22:06,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:22:06,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 179 interpolants. [2021-07-13 20:22:06,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4183, Invalid=27679, Unknown=0, NotChecked=0, Total=31862 [2021-07-13 20:22:06,838 INFO L87 Difference]: Start difference. First operand 3246 states and 6614 transitions. Second operand has 179 states, 179 states have (on average 1.0558659217877095) internal successors, (189), 178 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:10,920 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 105 [2021-07-13 20:22:11,184 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 109 [2021-07-13 20:22:11,466 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 113 [2021-07-13 20:22:11,742 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 112 [2021-07-13 20:22:12,033 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 121 [2021-07-13 20:22:12,326 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 120 [2021-07-13 20:22:12,640 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 129 [2021-07-13 20:22:12,962 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 128 [2021-07-13 20:22:13,302 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 137 [2021-07-13 20:22:13,654 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 141 [2021-07-13 20:22:14,018 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 145 [2021-07-13 20:22:14,374 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 144 [2021-07-13 20:22:14,731 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 148 [2021-07-13 20:22:15,136 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 157 [2021-07-13 20:22:15,543 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 156 [2021-07-13 20:22:15,941 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 160 [2021-07-13 20:22:16,346 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 172 DAG size of output: 164 [2021-07-13 20:22:16,798 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 173 [2021-07-13 20:22:17,261 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 177 [2021-07-13 20:22:17,701 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 184 DAG size of output: 176 [2021-07-13 20:22:18,164 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 180 [2021-07-13 20:22:18,541 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2021-07-13 20:22:18,861 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 179 [2021-07-13 20:22:19,177 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2021-07-13 20:22:19,665 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2021-07-13 20:22:19,895 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 180 [2021-07-13 20:22:20,351 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2021-07-13 20:22:20,594 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 176 [2021-07-13 20:22:21,054 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2021-07-13 20:22:21,284 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2021-07-13 20:22:21,984 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2021-07-13 20:22:22,447 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2021-07-13 20:22:22,911 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2021-07-13 20:22:24,061 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 174 [2021-07-13 20:22:24,738 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2021-07-13 20:22:25,213 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 174 [2021-07-13 20:25:21,405 WARN L227 Executor]: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000) stderr output: (error "out of memory") [2021-07-13 20:25:21,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 809 states. [2021-07-13 20:25:21,606 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:25:21,607 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. stderr output: (error "out of memory") at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:241) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseCheckSatResult(Executor.java:258) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.checkSat(Scriptor.java:155) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.checkSat(ManagedScript.java:138) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker.checkImplication(MonolithicImplicationChecker.java:85) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.compare(PredicateUnifier.java:934) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.(PredicateUnifier.java:773) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:345) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicateForConjunction(PredicateUnifier.java:388) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicateForConjunction(PredicateUnifier.java:229) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.getOrConstructPredicate(DeterministicInterpolantAutomaton.java:281) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.constructSuccessorsAndTransitions(DeterministicInterpolantAutomaton.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:78) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:213) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:216) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:208) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1064) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:966) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:187) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:847) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:761) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:474) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:374) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:69) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:63) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:367) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:293) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:238) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:167) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1461) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:654) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:419) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:238) ... 48 more [2021-07-13 20:25:21,610 INFO L168 Benchmark]: Toolchain (without parser) took 745432.95 ms. Allocated memory was 195.0 MB in the beginning and 1.3 GB in the end (delta: 1.1 GB). Free memory was 174.4 MB in the beginning and 425.5 MB in the end (delta: -251.1 MB). Peak memory consumption was 884.9 MB. Max. memory is 8.0 GB. [2021-07-13 20:25:21,610 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 195.0 MB. Free memory is still 175.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-07-13 20:25:21,610 INFO L168 Benchmark]: Boogie Procedure Inliner took 22.92 ms. Allocated memory is still 195.0 MB. Free memory was 174.3 MB in the beginning and 172.8 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-07-13 20:25:21,610 INFO L168 Benchmark]: Boogie Preprocessor took 12.71 ms. Allocated memory is still 195.0 MB. Free memory was 172.8 MB in the beginning and 171.9 MB in the end (delta: 856.2 kB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-07-13 20:25:21,610 INFO L168 Benchmark]: RCFGBuilder took 241.98 ms. Allocated memory is still 195.0 MB. Free memory was 171.8 MB in the beginning and 161.1 MB in the end (delta: 10.7 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2021-07-13 20:25:21,610 INFO L168 Benchmark]: TraceAbstraction took 745150.59 ms. Allocated memory was 195.0 MB in the beginning and 1.3 GB in the end (delta: 1.1 GB). Free memory was 160.6 MB in the beginning and 425.5 MB in the end (delta: -264.9 MB). Peak memory consumption was 871.3 MB. Max. memory is 8.0 GB. [2021-07-13 20:25:21,611 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 195.0 MB. Free memory is still 175.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 22.92 ms. Allocated memory is still 195.0 MB. Free memory was 174.3 MB in the beginning and 172.8 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 8.0 GB. * Boogie Preprocessor took 12.71 ms. Allocated memory is still 195.0 MB. Free memory was 172.8 MB in the beginning and 171.9 MB in the end (delta: 856.2 kB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 241.98 ms. Allocated memory is still 195.0 MB. Free memory was 171.8 MB in the beginning and 161.1 MB in the end (delta: 10.7 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 745150.59 ms. Allocated memory was 195.0 MB in the beginning and 1.3 GB in the end (delta: 1.1 GB). Free memory was 160.6 MB in the beginning and 425.5 MB in the end (delta: -264.9 MB). Peak memory consumption was 871.3 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. stderr output: (error "out of memory") de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. stderr output: (error "out of memory") : de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:241) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...