/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 0.2.1-9bbddad6b14272d9691b7fb6f1c011d15ab18596-9bbddad [2021-06-12 21:18:18,784 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-12 21:18:18,787 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-12 21:18:18,825 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-12 21:18:18,885 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 [2021-06-12 21:18:18,934 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-12 21:18:18,935 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-12 21:18:18,935 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-12 21:18:18,935 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-12 21:18:18,937 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-12 21:18:18,938 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-12 21:18:18,938 INFO L138 SettingsManager]: * Use SBE=true [2021-06-12 21:18:18,938 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-12 21:18:18,938 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-12 21:18:18,939 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-12 21:18:18,939 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-12 21:18:18,940 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-12 21:18:18,940 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-12 21:18:18,940 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-12 21:18:18,940 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-12 21:18:18,940 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-12 21:18:18,940 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-12 21:18:18,940 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-12 21:18:18,941 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-12 21:18:18,941 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-12 21:18:18,941 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-12 21:18:18,941 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-12 21:18:18,941 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-12 21:18:18,941 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-12 21:18:18,942 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-12 21:18:18,942 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-12 21:18:18,942 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-12 21:18:18,942 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-12 21:18:18,942 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-12 21:18:18,942 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-12 21:18:18,943 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-12 21:18:18,943 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-12 21:18:19,253 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-12 21:18:19,270 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-12 21:18:19,272 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-12 21:18:19,273 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-12 21:18:19,274 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-12 21:18:19,275 INFO L432 ainManager$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 [2021-06-12 21:18:19,275 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/simple-queue.wvr.bpl' [2021-06-12 21:18:19,307 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-12 21:18:19,309 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-12 21:18:19,310 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-12 21:18:19,310 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-12 21:18:19,310 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-12 21:18:19,322 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 12.06 09:18:19" (1/1) ... [2021-06-12 21:18:19,329 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 12.06 09:18:19" (1/1) ... [2021-06-12 21:18:19,336 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-12 21:18:19,338 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-12 21:18:19,338 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-12 21:18:19,339 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-12 21:18:19,346 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 09:18:19" (1/1) ... [2021-06-12 21:18:19,347 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 09:18:19" (1/1) ... [2021-06-12 21:18:19,347 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 09:18:19" (1/1) ... [2021-06-12 21:18:19,347 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 09:18:19" (1/1) ... [2021-06-12 21:18:19,350 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 09:18:19" (1/1) ... [2021-06-12 21:18:19,353 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 09:18:19" (1/1) ... [2021-06-12 21:18:19,353 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 09:18:19" (1/1) ... [2021-06-12 21:18:19,354 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-12 21:18:19,356 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-12 21:18:19,356 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-12 21:18:19,356 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-12 21:18:19,359 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 09:18:19" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-12 21:18:19,435 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-12 21:18:19,436 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-12 21:18:19,436 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-12 21:18:19,436 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-12 21:18:19,436 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-12 21:18:19,436 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-12 21:18:19,437 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-12 21:18:19,437 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-12 21:18:19,437 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-12 21:18:19,438 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-12 21:18:19,628 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-12 21:18:19,628 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-06-12 21:18:19,629 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread1EXIT is neither atomic block end nor error location. [2021-06-12 21:18:19,629 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread2EXIT is neither atomic block end nor error location. [2021-06-12 21:18:19,631 INFO L202 PluginConnector]: Adding new model simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.06 09:18:19 BoogieIcfgContainer [2021-06-12 21:18:19,631 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-12 21:18:19,632 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-12 21:18:19,633 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-12 21:18:19,635 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-12 21:18:19,635 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 09:18:19" (1/2) ... [2021-06-12 21:18:19,636 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2902c293 and model type simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.06 09:18:19, skipping insertion in model container [2021-06-12 21:18:19,636 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.06 09:18:19" (2/2) ... [2021-06-12 21:18:19,644 INFO L111 eAbstractionObserver]: Analyzing ICFG simple-queue.wvr.bpl [2021-06-12 21:18:19,649 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-12 21:18:19,649 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-12 21:18:19,650 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-12 21:18:19,650 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-12 21:18:19,708 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-06-12 21:18:19,742 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-12 21:18:19,775 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-12 21:18:19,775 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-12 21:18:19,775 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-12 21:18:19,776 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-12 21:18:19,776 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-12 21:18:19,776 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-12 21:18:19,776 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-12 21:18:19,776 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-12 21:18:19,783 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 46 flow [2021-06-12 21:18:19,817 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 15 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:18:19,819 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:18:19,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-06-12 21:18:19,824 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:18:19,824 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:18:19,825 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:18:19,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:18:19,834 INFO L82 PathProgramCache]: Analyzing trace with hash -262068682, now seen corresponding path program 1 times [2021-06-12 21:18:19,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:18:19,843 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263919285] [2021-06-12 21:18:19,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:18:19,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:18:19,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:18:19,962 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:18:19,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263919285] [2021-06-12 21:18:19,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263919285] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 21:18:19,964 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 21:18:19,964 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-12 21:18:19,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810979774] [2021-06-12 21:18:19,968 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-12 21:18:19,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:18:19,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-12 21:18:19,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-12 21:18:19,985 INFO L87 Difference]: Start difference. First operand has 15 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:18:20,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:18:20,007 INFO L93 Difference]: Finished difference Result 20 states and 34 transitions. [2021-06-12 21:18:20,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-12 21:18:20,009 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 [2021-06-12 21:18:20,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:18:20,019 INFO L225 Difference]: With dead ends: 20 [2021-06-12 21:18:20,019 INFO L226 Difference]: Without dead ends: 16 [2021-06-12 21:18:20,021 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-12 21:18:20,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-06-12 21:18:20,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-06-12 21:18:20,048 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) [2021-06-12 21:18:20,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 27 transitions. [2021-06-12 21:18:20,050 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 27 transitions. Word has length 9 [2021-06-12 21:18:20,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:18:20,050 INFO L482 AbstractCegarLoop]: Abstraction has 16 states and 27 transitions. [2021-06-12 21:18:20,050 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) [2021-06-12 21:18:20,051 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 27 transitions. [2021-06-12 21:18:20,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-06-12 21:18:20,051 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:18:20,051 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:18:20,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-12 21:18:20,053 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:18:20,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:18:20,057 INFO L82 PathProgramCache]: Analyzing trace with hash 488876151, now seen corresponding path program 1 times [2021-06-12 21:18:20,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:18:20,059 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452699534] [2021-06-12 21:18:20,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:18:20,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:18:20,092 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:18:20,093 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:18:20,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452699534] [2021-06-12 21:18:20,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452699534] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 21:18:20,093 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 21:18:20,094 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-12 21:18:20,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100885499] [2021-06-12 21:18:20,095 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-12 21:18:20,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:18:20,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-12 21:18:20,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-12 21:18:20,096 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) [2021-06-12 21:18:20,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:18:20,102 INFO L93 Difference]: Finished difference Result 21 states and 34 transitions. [2021-06-12 21:18:20,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-12 21:18:20,102 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 [2021-06-12 21:18:20,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:18:20,105 INFO L225 Difference]: With dead ends: 21 [2021-06-12 21:18:20,105 INFO L226 Difference]: Without dead ends: 18 [2021-06-12 21:18:20,108 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-12 21:18:20,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-06-12 21:18:20,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-06-12 21:18:20,115 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) [2021-06-12 21:18:20,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 30 transitions. [2021-06-12 21:18:20,117 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 30 transitions. Word has length 10 [2021-06-12 21:18:20,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:18:20,118 INFO L482 AbstractCegarLoop]: Abstraction has 18 states and 30 transitions. [2021-06-12 21:18:20,118 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) [2021-06-12 21:18:20,118 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 30 transitions. [2021-06-12 21:18:20,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-06-12 21:18:20,118 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:18:20,119 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:18:20,119 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-12 21:18:20,120 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:18:20,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:18:20,121 INFO L82 PathProgramCache]: Analyzing trace with hash 426152002, now seen corresponding path program 1 times [2021-06-12 21:18:20,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:18:20,123 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939313558] [2021-06-12 21:18:20,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:18:20,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:18:20,178 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:18:20,179 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:18:20,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939313558] [2021-06-12 21:18:20,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939313558] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:18:20,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956651541] [2021-06-12 21:18:20,179 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 [2021-06-12 21:18:20,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:18:20,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 21:18:20,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:18:20,302 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 [2021-06-12 21:18:20,309 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:18:20,312 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:18:20,313 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:18:20,313 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-12 21:18:20,328 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:18:20,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956651541] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:18:20,329 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:18:20,329 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-12 21:18:20,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355383648] [2021-06-12 21:18:20,329 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 21:18:20,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:18:20,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 21:18:20,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-12 21:18:20,331 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) [2021-06-12 21:18:20,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:18:20,358 INFO L93 Difference]: Finished difference Result 25 states and 43 transitions. [2021-06-12 21:18:20,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 21:18:20,359 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 [2021-06-12 21:18:20,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:18:20,359 INFO L225 Difference]: With dead ends: 25 [2021-06-12 21:18:20,360 INFO L226 Difference]: Without dead ends: 21 [2021-06-12 21:18:20,360 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 25.7ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-12 21:18:20,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-06-12 21:18:20,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-06-12 21:18:20,367 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) [2021-06-12 21:18:20,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 36 transitions. [2021-06-12 21:18:20,368 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 36 transitions. Word has length 11 [2021-06-12 21:18:20,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:18:20,368 INFO L482 AbstractCegarLoop]: Abstraction has 21 states and 36 transitions. [2021-06-12 21:18:20,368 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) [2021-06-12 21:18:20,369 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 36 transitions. [2021-06-12 21:18:20,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-12 21:18:20,369 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:18:20,369 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:18:20,593 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-06-12 21:18:20,593 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:18:20,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:18:20,594 INFO L82 PathProgramCache]: Analyzing trace with hash 348880875, now seen corresponding path program 2 times [2021-06-12 21:18:20,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:18:20,594 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039991853] [2021-06-12 21:18:20,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:18:20,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:18:20,649 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:18:20,650 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:18:20,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039991853] [2021-06-12 21:18:20,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039991853] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:18:20,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980842434] [2021-06-12 21:18:20,650 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 [2021-06-12 21:18:20,691 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:18:20,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:18:20,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-12 21:18:20,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:18:20,760 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:18:20,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980842434] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:18:20,760 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:18:20,760 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 4 [2021-06-12 21:18:20,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507029848] [2021-06-12 21:18:20,761 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 21:18:20,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:18:20,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 21:18:20,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-12 21:18:20,762 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) [2021-06-12 21:18:20,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:18:20,772 INFO L93 Difference]: Finished difference Result 50 states and 82 transitions. [2021-06-12 21:18:20,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-12 21:18:20,773 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 [2021-06-12 21:18:20,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:18:20,775 INFO L225 Difference]: With dead ends: 50 [2021-06-12 21:18:20,775 INFO L226 Difference]: Without dead ends: 45 [2021-06-12 21:18:20,775 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.9ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-12 21:18:20,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-06-12 21:18:20,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 33. [2021-06-12 21:18:20,780 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) [2021-06-12 21:18:20,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 62 transitions. [2021-06-12 21:18:20,781 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 62 transitions. Word has length 12 [2021-06-12 21:18:20,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:18:20,781 INFO L482 AbstractCegarLoop]: Abstraction has 33 states and 62 transitions. [2021-06-12 21:18:20,781 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) [2021-06-12 21:18:20,781 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 62 transitions. [2021-06-12 21:18:20,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-12 21:18:20,782 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:18:20,782 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:18:20,985 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:18:20,986 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:18:20,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:18:20,986 INFO L82 PathProgramCache]: Analyzing trace with hash 200515830, now seen corresponding path program 3 times [2021-06-12 21:18:20,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:18:20,986 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237197169] [2021-06-12 21:18:20,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:18:20,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:18:21,046 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:18:21,046 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:18:21,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237197169] [2021-06-12 21:18:21,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237197169] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:18:21,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570660134] [2021-06-12 21:18:21,047 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 [2021-06-12 21:18:21,080 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 21:18:21,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:18:21,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 21:18:21,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:18:21,175 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 [2021-06-12 21:18:21,180 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:18:21,182 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:18:21,182 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:18:21,183 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-12 21:18:21,194 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:18:21,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570660134] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:18:21,194 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:18:21,195 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-12 21:18:21,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216517238] [2021-06-12 21:18:21,195 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-12 21:18:21,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:18:21,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-12 21:18:21,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-12 21:18:21,196 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) [2021-06-12 21:18:21,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:18:21,292 INFO L93 Difference]: Finished difference Result 65 states and 115 transitions. [2021-06-12 21:18:21,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-12 21:18:21,293 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 [2021-06-12 21:18:21,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:18:21,294 INFO L225 Difference]: With dead ends: 65 [2021-06-12 21:18:21,294 INFO L226 Difference]: Without dead ends: 39 [2021-06-12 21:18:21,297 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 76.4ms TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-06-12 21:18:21,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-06-12 21:18:21,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 26. [2021-06-12 21:18:21,304 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) [2021-06-12 21:18:21,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 46 transitions. [2021-06-12 21:18:21,304 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 46 transitions. Word has length 13 [2021-06-12 21:18:21,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:18:21,305 INFO L482 AbstractCegarLoop]: Abstraction has 26 states and 46 transitions. [2021-06-12 21:18:21,305 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) [2021-06-12 21:18:21,305 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 46 transitions. [2021-06-12 21:18:21,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-12 21:18:21,305 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:18:21,305 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:18:21,530 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:18:21,531 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:18:21,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:18:21,531 INFO L82 PathProgramCache]: Analyzing trace with hash 1944094135, now seen corresponding path program 4 times [2021-06-12 21:18:21,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:18:21,531 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347007451] [2021-06-12 21:18:21,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:18:21,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:18:21,594 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:18:21,595 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:18:21,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347007451] [2021-06-12 21:18:21,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347007451] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:18:21,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027668694] [2021-06-12 21:18:21,595 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 [2021-06-12 21:18:21,623 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:18:21,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:18:21,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-12 21:18:21,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:18:21,662 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:18:21,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1027668694] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:18:21,663 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:18:21,663 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-06-12 21:18:21,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161170465] [2021-06-12 21:18:21,663 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-12 21:18:21,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:18:21,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-12 21:18:21,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-06-12 21:18:21,664 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) [2021-06-12 21:18:21,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:18:21,677 INFO L93 Difference]: Finished difference Result 73 states and 125 transitions. [2021-06-12 21:18:21,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 21:18:21,677 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 [2021-06-12 21:18:21,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:18:21,678 INFO L225 Difference]: With dead ends: 73 [2021-06-12 21:18:21,678 INFO L226 Difference]: Without dead ends: 66 [2021-06-12 21:18:21,678 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 24.0ms TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-06-12 21:18:21,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-06-12 21:18:21,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 48. [2021-06-12 21:18:21,683 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) [2021-06-12 21:18:21,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 95 transitions. [2021-06-12 21:18:21,684 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 95 transitions. Word has length 14 [2021-06-12 21:18:21,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:18:21,684 INFO L482 AbstractCegarLoop]: Abstraction has 48 states and 95 transitions. [2021-06-12 21:18:21,684 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) [2021-06-12 21:18:21,684 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 95 transitions. [2021-06-12 21:18:21,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 21:18:21,685 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:18:21,685 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:18:21,920 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:18:21,921 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:18:21,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:18:21,922 INFO L82 PathProgramCache]: Analyzing trace with hash 1099206658, now seen corresponding path program 5 times [2021-06-12 21:18:21,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:18:21,922 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090518733] [2021-06-12 21:18:21,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:18:21,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:18:22,018 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:18:22,018 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:18:22,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090518733] [2021-06-12 21:18:22,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090518733] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:18:22,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347841364] [2021-06-12 21:18:22,019 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 [2021-06-12 21:18:22,054 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 21:18:22,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:18:22,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 21:18:22,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:18:22,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:18:22,335 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 [2021-06-12 21:18:22,337 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:18:22,342 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:18:22,345 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:18:22,345 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:19, output treesize:3 [2021-06-12 21:18:22,352 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:18:22,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347841364] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:18:22,352 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:18:22,352 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-12 21:18:22,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38352564] [2021-06-12 21:18:22,353 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 21:18:22,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:18:22,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 21:18:22,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-12 21:18:22,354 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) [2021-06-12 21:18:22,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:18:22,765 INFO L93 Difference]: Finished difference Result 229 states and 428 transitions. [2021-06-12 21:18:22,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 21:18:22,766 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 [2021-06-12 21:18:22,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:18:22,767 INFO L225 Difference]: With dead ends: 229 [2021-06-12 21:18:22,767 INFO L226 Difference]: Without dead ends: 116 [2021-06-12 21:18:22,767 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 412.7ms TimeCoverageRelationStatistics Valid=207, Invalid=723, Unknown=0, NotChecked=0, Total=930 [2021-06-12 21:18:22,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-06-12 21:18:22,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 56. [2021-06-12 21:18:22,774 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) [2021-06-12 21:18:22,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 113 transitions. [2021-06-12 21:18:22,775 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 113 transitions. Word has length 15 [2021-06-12 21:18:22,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:18:22,775 INFO L482 AbstractCegarLoop]: Abstraction has 56 states and 113 transitions. [2021-06-12 21:18:22,775 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) [2021-06-12 21:18:22,775 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 113 transitions. [2021-06-12 21:18:22,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 21:18:22,776 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:18:22,776 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:18:22,993 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-06-12 21:18:22,993 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:18:22,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:18:22,993 INFO L82 PathProgramCache]: Analyzing trace with hash -449307722, now seen corresponding path program 6 times [2021-06-12 21:18:22,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:18:22,994 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108849455] [2021-06-12 21:18:22,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:18:23,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:18:23,109 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:18:23,110 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:18:23,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108849455] [2021-06-12 21:18:23,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108849455] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:18:23,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35341846] [2021-06-12 21:18:23,110 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 [2021-06-12 21:18:23,141 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 21:18:23,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:18:23,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 21:18:23,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:18:23,210 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 [2021-06-12 21:18:23,211 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:18:23,213 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:18:23,213 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:18:23,213 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-12 21:18:23,221 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:18:23,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35341846] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:18:23,221 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:18:23,221 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-12 21:18:23,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471367691] [2021-06-12 21:18:23,221 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 21:18:23,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:18:23,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 21:18:23,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-06-12 21:18:23,222 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) [2021-06-12 21:18:23,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:18:23,390 INFO L93 Difference]: Finished difference Result 121 states and 226 transitions. [2021-06-12 21:18:23,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 21:18:23,390 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 10 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 21:18:23,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:18:23,391 INFO L225 Difference]: With dead ends: 121 [2021-06-12 21:18:23,392 INFO L226 Difference]: Without dead ends: 77 [2021-06-12 21:18:23,392 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 183.7ms TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-06-12 21:18:23,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-06-12 21:18:23,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 36. [2021-06-12 21:18:23,408 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) [2021-06-12 21:18:23,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 66 transitions. [2021-06-12 21:18:23,408 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 66 transitions. Word has length 17 [2021-06-12 21:18:23,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:18:23,408 INFO L482 AbstractCegarLoop]: Abstraction has 36 states and 66 transitions. [2021-06-12 21:18:23,409 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) [2021-06-12 21:18:23,409 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 66 transitions. [2021-06-12 21:18:23,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 21:18:23,409 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:18:23,409 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:18:23,610 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:18:23,610 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:18:23,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:18:23,610 INFO L82 PathProgramCache]: Analyzing trace with hash -1020566793, now seen corresponding path program 7 times [2021-06-12 21:18:23,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:18:23,611 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406811119] [2021-06-12 21:18:23,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:18:23,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:18:23,660 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:18:23,660 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:18:23,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406811119] [2021-06-12 21:18:23,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406811119] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:18:23,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336972572] [2021-06-12 21:18:23,661 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 [2021-06-12 21:18:23,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:18:23,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 21:18:23,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:18:23,787 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:18:23,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1336972572] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:18:23,787 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:18:23,788 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-06-12 21:18:23,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474270907] [2021-06-12 21:18:23,790 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 21:18:23,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:18:23,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 21:18:23,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-06-12 21:18:23,791 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) [2021-06-12 21:18:23,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:18:23,806 INFO L93 Difference]: Finished difference Result 128 states and 229 transitions. [2021-06-12 21:18:23,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-12 21:18:23,807 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 [2021-06-12 21:18:23,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:18:23,807 INFO L225 Difference]: With dead ends: 128 [2021-06-12 21:18:23,808 INFO L226 Difference]: Without dead ends: 117 [2021-06-12 21:18:23,808 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 21.8ms TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-06-12 21:18:23,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-06-12 21:18:23,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 87. [2021-06-12 21:18:23,812 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) [2021-06-12 21:18:23,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 179 transitions. [2021-06-12 21:18:23,813 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 179 transitions. Word has length 18 [2021-06-12 21:18:23,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:18:23,814 INFO L482 AbstractCegarLoop]: Abstraction has 87 states and 179 transitions. [2021-06-12 21:18:23,814 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) [2021-06-12 21:18:23,814 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 179 transitions. [2021-06-12 21:18:23,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 21:18:23,815 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:18:23,815 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:18:24,035 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:18:24,036 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:18:24,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:18:24,036 INFO L82 PathProgramCache]: Analyzing trace with hash -1344581694, now seen corresponding path program 8 times [2021-06-12 21:18:24,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:18:24,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751858775] [2021-06-12 21:18:24,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:18:24,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:18:24,171 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:18:24,171 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:18:24,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751858775] [2021-06-12 21:18:24,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751858775] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:18:24,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384173299] [2021-06-12 21:18:24,172 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 [2021-06-12 21:18:24,208 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:18:24,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:18:24,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 21:18:24,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:18:24,272 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 [2021-06-12 21:18:24,274 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:18:24,275 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:18:24,276 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:18:24,276 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-12 21:18:24,282 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:18:24,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384173299] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:18:24,283 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:18:24,283 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-06-12 21:18:24,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199762215] [2021-06-12 21:18:24,285 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 21:18:24,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:18:24,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 21:18:24,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2021-06-12 21:18:24,286 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) [2021-06-12 21:18:24,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:18:24,502 INFO L93 Difference]: Finished difference Result 179 states and 337 transitions. [2021-06-12 21:18:24,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 21:18:24,502 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 [2021-06-12 21:18:24,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:18:24,503 INFO L225 Difference]: With dead ends: 179 [2021-06-12 21:18:24,503 INFO L226 Difference]: Without dead ends: 105 [2021-06-12 21:18:24,504 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 247.5ms TimeCoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2021-06-12 21:18:24,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-06-12 21:18:24,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 41. [2021-06-12 21:18:24,512 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) [2021-06-12 21:18:24,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 76 transitions. [2021-06-12 21:18:24,515 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 76 transitions. Word has length 19 [2021-06-12 21:18:24,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:18:24,515 INFO L482 AbstractCegarLoop]: Abstraction has 41 states and 76 transitions. [2021-06-12 21:18:24,515 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) [2021-06-12 21:18:24,516 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 76 transitions. [2021-06-12 21:18:24,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 21:18:24,518 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:18:24,518 INFO L472 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:18:24,742 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-06-12 21:18:24,742 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:18:24,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:18:24,742 INFO L82 PathProgramCache]: Analyzing trace with hash 1290711147, now seen corresponding path program 9 times [2021-06-12 21:18:24,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:18:24,743 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700553796] [2021-06-12 21:18:24,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:18:24,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:18:24,822 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:18:24,822 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:18:24,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700553796] [2021-06-12 21:18:24,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700553796] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:18:24,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725222742] [2021-06-12 21:18:24,822 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 [2021-06-12 21:18:24,870 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 21:18:24,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:18:24,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 21:18:24,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:18:24,930 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:18:24,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [725222742] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:18:24,930 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:18:24,931 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-12 21:18:24,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991457835] [2021-06-12 21:18:24,931 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 21:18:24,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:18:24,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 21:18:24,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-06-12 21:18:24,932 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) [2021-06-12 21:18:24,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:18:24,951 INFO L93 Difference]: Finished difference Result 160 states and 290 transitions. [2021-06-12 21:18:24,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 21:18:24,952 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 [2021-06-12 21:18:24,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:18:24,953 INFO L225 Difference]: With dead ends: 160 [2021-06-12 21:18:24,954 INFO L226 Difference]: Without dead ends: 147 [2021-06-12 21:18:24,954 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 39.6ms TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-06-12 21:18:24,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-06-12 21:18:24,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 111. [2021-06-12 21:18:24,960 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) [2021-06-12 21:18:24,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 230 transitions. [2021-06-12 21:18:24,961 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 230 transitions. Word has length 20 [2021-06-12 21:18:24,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:18:24,961 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 230 transitions. [2021-06-12 21:18:24,961 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) [2021-06-12 21:18:24,961 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 230 transitions. [2021-06-12 21:18:24,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 21:18:24,962 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:18:24,962 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:18:25,172 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:18:25,173 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:18:25,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:18:25,173 INFO L82 PathProgramCache]: Analyzing trace with hash -849963402, now seen corresponding path program 10 times [2021-06-12 21:18:25,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:18:25,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125494079] [2021-06-12 21:18:25,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:18:25,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:18:25,357 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:18:25,358 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:18:25,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125494079] [2021-06-12 21:18:25,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125494079] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:18:25,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641042456] [2021-06-12 21:18:25,358 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 [2021-06-12 21:18:25,387 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:18:25,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:18:25,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 21:18:25,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:18:25,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 21:18:25,450 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:18:25,452 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:18:25,452 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:18:25,452 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-12 21:18:25,458 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:18:25,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [641042456] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:18:25,459 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:18:25,459 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-06-12 21:18:25,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584947763] [2021-06-12 21:18:25,459 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 21:18:25,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:18:25,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 21:18:25,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2021-06-12 21:18:25,460 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) [2021-06-12 21:18:25,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:18:25,730 INFO L93 Difference]: Finished difference Result 229 states and 435 transitions. [2021-06-12 21:18:25,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 21:18:25,730 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 [2021-06-12 21:18:25,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:18:25,731 INFO L225 Difference]: With dead ends: 229 [2021-06-12 21:18:25,731 INFO L226 Difference]: Without dead ends: 135 [2021-06-12 21:18:25,732 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 319.0ms TimeCoverageRelationStatistics Valid=135, Invalid=567, Unknown=0, NotChecked=0, Total=702 [2021-06-12 21:18:25,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-06-12 21:18:25,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 46. [2021-06-12 21:18:25,737 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) [2021-06-12 21:18:25,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 86 transitions. [2021-06-12 21:18:25,737 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 86 transitions. Word has length 21 [2021-06-12 21:18:25,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:18:25,737 INFO L482 AbstractCegarLoop]: Abstraction has 46 states and 86 transitions. [2021-06-12 21:18:25,737 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) [2021-06-12 21:18:25,737 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 86 transitions. [2021-06-12 21:18:25,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 21:18:25,740 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:18:25,740 INFO L472 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:18:25,953 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:18:25,953 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:18:25,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:18:25,954 INFO L82 PathProgramCache]: Analyzing trace with hash -555990985, now seen corresponding path program 11 times [2021-06-12 21:18:25,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:18:25,954 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274218391] [2021-06-12 21:18:25,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:18:25,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:18:26,031 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:18:26,031 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:18:26,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274218391] [2021-06-12 21:18:26,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274218391] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:18:26,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941249418] [2021-06-12 21:18:26,031 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 [2021-06-12 21:18:26,062 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 21:18:26,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:18:26,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 21:18:26,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:18:26,119 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:18:26,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941249418] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:18:26,119 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:18:26,119 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-12 21:18:26,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086018127] [2021-06-12 21:18:26,120 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 21:18:26,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:18:26,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 21:18:26,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-06-12 21:18:26,121 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) [2021-06-12 21:18:26,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:18:26,141 INFO L93 Difference]: Finished difference Result 195 states and 357 transitions. [2021-06-12 21:18:26,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 21:18:26,141 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 [2021-06-12 21:18:26,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:18:26,142 INFO L225 Difference]: With dead ends: 195 [2021-06-12 21:18:26,142 INFO L226 Difference]: Without dead ends: 180 [2021-06-12 21:18:26,142 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 31.6ms TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-06-12 21:18:26,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-06-12 21:18:26,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 138. [2021-06-12 21:18:26,145 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) [2021-06-12 21:18:26,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 287 transitions. [2021-06-12 21:18:26,146 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 287 transitions. Word has length 22 [2021-06-12 21:18:26,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:18:26,146 INFO L482 AbstractCegarLoop]: Abstraction has 138 states and 287 transitions. [2021-06-12 21:18:26,146 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) [2021-06-12 21:18:26,147 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 287 transitions. [2021-06-12 21:18:26,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 21:18:26,147 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:18:26,147 INFO L472 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:18:26,364 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-06-12 21:18:26,364 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:18:26,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:18:26,365 INFO L82 PathProgramCache]: Analyzing trace with hash -454897790, now seen corresponding path program 12 times [2021-06-12 21:18:26,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:18:26,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758795641] [2021-06-12 21:18:26,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:18:26,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:18:26,579 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:18:26,579 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:18:26,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758795641] [2021-06-12 21:18:26,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758795641] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:18:26,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296149348] [2021-06-12 21:18:26,580 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 [2021-06-12 21:18:26,616 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 21:18:26,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:18:26,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 21:18:26,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:18:27,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:18:27,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 21:18:27,154 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:18:27,158 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:18:27,161 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:18:27,161 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:19, output treesize:3 [2021-06-12 21:18:27,168 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 21 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:18:27,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296149348] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:18:27,168 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:18:27,168 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-06-12 21:18:27,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642825581] [2021-06-12 21:18:27,169 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-12 21:18:27,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:18:27,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-12 21:18:27,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=780, Unknown=0, NotChecked=0, Total=930 [2021-06-12 21:18:27,170 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) [2021-06-12 21:18:28,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:18:28,855 INFO L93 Difference]: Finished difference Result 869 states and 1674 transitions. [2021-06-12 21:18:28,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-12 21:18:28,856 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 [2021-06-12 21:18:28,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:18:28,859 INFO L225 Difference]: With dead ends: 869 [2021-06-12 21:18:28,859 INFO L226 Difference]: Without dead ends: 472 [2021-06-12 21:18:28,861 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1485 ImplicationChecksByTransitivity, 1839.8ms TimeCoverageRelationStatistics Valid=1224, Invalid=5256, Unknown=0, NotChecked=0, Total=6480 [2021-06-12 21:18:28,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2021-06-12 21:18:28,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 150. [2021-06-12 21:18:28,867 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) [2021-06-12 21:18:28,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 313 transitions. [2021-06-12 21:18:28,868 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 313 transitions. Word has length 23 [2021-06-12 21:18:28,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:18:28,868 INFO L482 AbstractCegarLoop]: Abstraction has 150 states and 313 transitions. [2021-06-12 21:18:28,869 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) [2021-06-12 21:18:28,869 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 313 transitions. [2021-06-12 21:18:28,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 21:18:28,871 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:18:28,871 INFO L472 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:18:29,084 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-06-12 21:18:29,085 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:18:29,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:18:29,085 INFO L82 PathProgramCache]: Analyzing trace with hash 1467420982, now seen corresponding path program 13 times [2021-06-12 21:18:29,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:18:29,085 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513940211] [2021-06-12 21:18:29,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:18:29,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:18:29,311 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:18:29,311 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:18:29,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513940211] [2021-06-12 21:18:29,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513940211] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:18:29,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226950981] [2021-06-12 21:18:29,311 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 [2021-06-12 21:18:29,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:18:29,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 21:18:29,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:18:29,401 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 [2021-06-12 21:18:29,403 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:18:29,404 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:18:29,405 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:18:29,405 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-12 21:18:29,411 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:18:29,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226950981] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:18:29,411 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:18:29,411 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-06-12 21:18:29,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269431883] [2021-06-12 21:18:29,411 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 21:18:29,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:18:29,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 21:18:29,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2021-06-12 21:18:29,412 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) [2021-06-12 21:18:29,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:18:29,850 INFO L93 Difference]: Finished difference Result 325 states and 626 transitions. [2021-06-12 21:18:29,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 21:18:29,850 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 [2021-06-12 21:18:29,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:18:29,851 INFO L225 Difference]: With dead ends: 325 [2021-06-12 21:18:29,851 INFO L226 Difference]: Without dead ends: 205 [2021-06-12 21:18:29,852 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 472.5ms TimeCoverageRelationStatistics Valid=211, Invalid=979, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 21:18:29,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-06-12 21:18:29,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 56. [2021-06-12 21:18:29,854 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) [2021-06-12 21:18:29,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 106 transitions. [2021-06-12 21:18:29,855 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 106 transitions. Word has length 25 [2021-06-12 21:18:29,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:18:29,855 INFO L482 AbstractCegarLoop]: Abstraction has 56 states and 106 transitions. [2021-06-12 21:18:29,855 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) [2021-06-12 21:18:29,855 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 106 transitions. [2021-06-12 21:18:29,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:18:29,855 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:18:29,855 INFO L472 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:18:30,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-12 21:18:30,065 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:18:30,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:18:30,065 INFO L82 PathProgramCache]: Analyzing trace with hash -1731519113, now seen corresponding path program 14 times [2021-06-12 21:18:30,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:18:30,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471959027] [2021-06-12 21:18:30,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:18:30,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:18:30,157 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:18:30,157 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:18:30,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471959027] [2021-06-12 21:18:30,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471959027] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:18:30,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774070675] [2021-06-12 21:18:30,157 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 [2021-06-12 21:18:30,207 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:18:30,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:18:30,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 21:18:30,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:18:30,287 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:18:30,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774070675] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:18:30,287 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:18:30,287 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-12 21:18:30,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797855162] [2021-06-12 21:18:30,288 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 21:18:30,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:18:30,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 21:18:30,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-06-12 21:18:30,288 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) [2021-06-12 21:18:30,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:18:30,315 INFO L93 Difference]: Finished difference Result 274 states and 509 transitions. [2021-06-12 21:18:30,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 21:18:30,315 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 [2021-06-12 21:18:30,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:18:30,316 INFO L225 Difference]: With dead ends: 274 [2021-06-12 21:18:30,316 INFO L226 Difference]: Without dead ends: 255 [2021-06-12 21:18:30,317 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 51.5ms TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-06-12 21:18:30,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-06-12 21:18:30,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 201. [2021-06-12 21:18:30,323 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) [2021-06-12 21:18:30,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 419 transitions. [2021-06-12 21:18:30,334 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 419 transitions. Word has length 26 [2021-06-12 21:18:30,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:18:30,334 INFO L482 AbstractCegarLoop]: Abstraction has 201 states and 419 transitions. [2021-06-12 21:18:30,334 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) [2021-06-12 21:18:30,334 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 419 transitions. [2021-06-12 21:18:30,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 21:18:30,335 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:18:30,335 INFO L472 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:18:30,548 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:18:30,549 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:18:30,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:18:30,549 INFO L82 PathProgramCache]: Analyzing trace with hash 252907330, now seen corresponding path program 15 times [2021-06-12 21:18:30,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:18:30,549 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795887360] [2021-06-12 21:18:30,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:18:30,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:18:30,812 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:18:30,812 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:18:30,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795887360] [2021-06-12 21:18:30,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795887360] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:18:30,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543366773] [2021-06-12 21:18:30,813 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 [2021-06-12 21:18:30,845 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-12 21:18:30,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:18:30,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-12 21:18:30,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:18:30,911 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 [2021-06-12 21:18:30,912 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:18:30,913 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:18:30,914 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:18:30,914 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-12 21:18:30,920 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:18:30,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543366773] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:18:30,920 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:18:30,920 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2021-06-12 21:18:30,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845013073] [2021-06-12 21:18:30,921 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 21:18:30,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:18:30,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 21:18:30,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2021-06-12 21:18:30,921 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) [2021-06-12 21:18:31,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:18:31,488 INFO L93 Difference]: Finished difference Result 415 states and 801 transitions. [2021-06-12 21:18:31,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 21:18:31,489 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 [2021-06-12 21:18:31,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:18:31,490 INFO L225 Difference]: With dead ends: 415 [2021-06-12 21:18:31,490 INFO L226 Difference]: Without dead ends: 249 [2021-06-12 21:18:31,491 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 599.4ms TimeCoverageRelationStatistics Valid=255, Invalid=1227, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 21:18:31,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-06-12 21:18:31,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 61. [2021-06-12 21:18:31,493 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) [2021-06-12 21:18:31,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 116 transitions. [2021-06-12 21:18:31,494 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 116 transitions. Word has length 27 [2021-06-12 21:18:31,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:18:31,494 INFO L482 AbstractCegarLoop]: Abstraction has 61 states and 116 transitions. [2021-06-12 21:18:31,494 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) [2021-06-12 21:18:31,494 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 116 transitions. [2021-06-12 21:18:31,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 21:18:31,494 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:18:31,494 INFO L472 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:18:31,717 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-06-12 21:18:31,717 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:18:31,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:18:31,717 INFO L82 PathProgramCache]: Analyzing trace with hash -726736661, now seen corresponding path program 16 times [2021-06-12 21:18:31,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:18:31,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165220330] [2021-06-12 21:18:31,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:18:31,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:18:31,806 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:18:31,806 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:18:31,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165220330] [2021-06-12 21:18:31,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165220330] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:18:31,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156430893] [2021-06-12 21:18:31,807 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 [2021-06-12 21:18:31,852 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:18:31,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:18:31,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 21:18:31,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:18:31,918 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:18:31,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156430893] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:18:31,918 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:18:31,918 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-12 21:18:31,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57643146] [2021-06-12 21:18:31,919 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 21:18:31,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:18:31,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 21:18:31,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-06-12 21:18:31,919 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) [2021-06-12 21:18:31,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:18:31,948 INFO L93 Difference]: Finished difference Result 318 states and 594 transitions. [2021-06-12 21:18:31,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 21:18:31,948 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 [2021-06-12 21:18:31,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:18:31,949 INFO L225 Difference]: With dead ends: 318 [2021-06-12 21:18:31,949 INFO L226 Difference]: Without dead ends: 297 [2021-06-12 21:18:31,950 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 61.0ms TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-06-12 21:18:31,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2021-06-12 21:18:31,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 237. [2021-06-12 21:18:31,954 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) [2021-06-12 21:18:31,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 494 transitions. [2021-06-12 21:18:31,955 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 494 transitions. Word has length 28 [2021-06-12 21:18:31,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:18:31,955 INFO L482 AbstractCegarLoop]: Abstraction has 237 states and 494 transitions. [2021-06-12 21:18:31,955 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) [2021-06-12 21:18:31,955 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 494 transitions. [2021-06-12 21:18:31,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 21:18:31,956 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:18:31,956 INFO L472 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:18:32,180 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-06-12 21:18:32,180 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:18:32,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:18:32,181 INFO L82 PathProgramCache]: Analyzing trace with hash -658404362, now seen corresponding path program 17 times [2021-06-12 21:18:32,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:18:32,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561240334] [2021-06-12 21:18:32,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:18:32,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:18:32,558 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:18:32,558 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:18:32,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561240334] [2021-06-12 21:18:32,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561240334] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:18:32,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906996197] [2021-06-12 21:18:32,559 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 [2021-06-12 21:18:32,594 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-12 21:18:32,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:18:32,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 21:18:32,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:18:33,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:18:33,435 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 [2021-06-12 21:18:33,436 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:18:33,441 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:18:33,443 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:18:33,443 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:19, output treesize:3 [2021-06-12 21:18:33,449 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 45 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:18:33,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906996197] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:18:33,449 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:18:33,450 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-06-12 21:18:33,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485382865] [2021-06-12 21:18:33,451 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-12 21:18:33,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:18:33,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-12 21:18:33,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=1533, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 21:18:33,452 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) [2021-06-12 21:18:37,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:18:37,253 INFO L93 Difference]: Finished difference Result 1727 states and 3354 transitions. [2021-06-12 21:18:37,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-06-12 21:18:37,254 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 [2021-06-12 21:18:37,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:18:37,258 INFO L225 Difference]: With dead ends: 1727 [2021-06-12 21:18:37,258 INFO L226 Difference]: Without dead ends: 1012 [2021-06-12 21:18:37,262 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4325 ImplicationChecksByTransitivity, 4088.6ms TimeCoverageRelationStatistics Valid=2986, Invalid=13526, Unknown=0, NotChecked=0, Total=16512 [2021-06-12 21:18:37,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1012 states. [2021-06-12 21:18:37,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1012 to 252. [2021-06-12 21:18:37,292 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) [2021-06-12 21:18:37,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 526 transitions. [2021-06-12 21:18:37,293 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 526 transitions. Word has length 29 [2021-06-12 21:18:37,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:18:37,293 INFO L482 AbstractCegarLoop]: Abstraction has 252 states and 526 transitions. [2021-06-12 21:18:37,293 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) [2021-06-12 21:18:37,293 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 526 transitions. [2021-06-12 21:18:37,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-12 21:18:37,294 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:18:37,295 INFO L472 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:18:37,517 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:18:37,518 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:18:37,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:18:37,518 INFO L82 PathProgramCache]: Analyzing trace with hash -1964765438, now seen corresponding path program 18 times [2021-06-12 21:18:37,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:18:37,518 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087936531] [2021-06-12 21:18:37,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:18:37,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:18:37,848 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:18:37,848 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:18:37,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087936531] [2021-06-12 21:18:37,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087936531] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:18:37,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348623863] [2021-06-12 21:18:37,848 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 [2021-06-12 21:18:37,882 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-12 21:18:37,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:18:37,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-12 21:18:37,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:18:37,947 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 [2021-06-12 21:18:37,948 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:18:37,950 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:18:37,950 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:18:37,950 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-12 21:18:37,956 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:18:37,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348623863] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:18:37,956 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:18:37,956 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2021-06-12 21:18:37,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601988835] [2021-06-12 21:18:37,957 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 21:18:37,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:18:37,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 21:18:37,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2021-06-12 21:18:37,958 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) [2021-06-12 21:18:38,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:18:38,667 INFO L93 Difference]: Finished difference Result 541 states and 1052 transitions. [2021-06-12 21:18:38,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 21:18:38,667 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 [2021-06-12 21:18:38,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:18:38,669 INFO L225 Difference]: With dead ends: 541 [2021-06-12 21:18:38,669 INFO L226 Difference]: Without dead ends: 343 [2021-06-12 21:18:38,670 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 772.8ms TimeCoverageRelationStatistics Valid=355, Invalid=1807, Unknown=0, NotChecked=0, Total=2162 [2021-06-12 21:18:38,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2021-06-12 21:18:38,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 71. [2021-06-12 21:18:38,673 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) [2021-06-12 21:18:38,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 136 transitions. [2021-06-12 21:18:38,673 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 136 transitions. Word has length 31 [2021-06-12 21:18:38,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:18:38,673 INFO L482 AbstractCegarLoop]: Abstraction has 71 states and 136 transitions. [2021-06-12 21:18:38,674 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) [2021-06-12 21:18:38,674 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 136 transitions. [2021-06-12 21:18:38,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-12 21:18:38,674 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:18:38,674 INFO L472 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:18:38,890 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:18:38,890 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:18:38,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:18:38,891 INFO L82 PathProgramCache]: Analyzing trace with hash -755115733, now seen corresponding path program 19 times [2021-06-12 21:18:38,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:18:38,891 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223454773] [2021-06-12 21:18:38,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:18:38,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:18:39,037 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 78 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:18:39,037 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:18:39,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223454773] [2021-06-12 21:18:39,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223454773] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:18:39,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296202624] [2021-06-12 21:18:39,038 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 [2021-06-12 21:18:39,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:18:39,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 21:18:39,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:18:39,145 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 78 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:18:39,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1296202624] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:18:39,146 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:18:39,146 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-12 21:18:39,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104767121] [2021-06-12 21:18:39,146 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 21:18:39,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:18:39,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 21:18:39,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-06-12 21:18:39,147 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) [2021-06-12 21:18:39,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:18:39,180 INFO L93 Difference]: Finished difference Result 415 states and 782 transitions. [2021-06-12 21:18:39,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 21:18:39,180 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 [2021-06-12 21:18:39,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:18:39,182 INFO L225 Difference]: With dead ends: 415 [2021-06-12 21:18:39,182 INFO L226 Difference]: Without dead ends: 390 [2021-06-12 21:18:39,182 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 99.2ms TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-06-12 21:18:39,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2021-06-12 21:18:39,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 318. [2021-06-12 21:18:39,191 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) [2021-06-12 21:18:39,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 662 transitions. [2021-06-12 21:18:39,192 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 662 transitions. Word has length 32 [2021-06-12 21:18:39,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:18:39,192 INFO L482 AbstractCegarLoop]: Abstraction has 318 states and 662 transitions. [2021-06-12 21:18:39,193 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) [2021-06-12 21:18:39,193 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 662 transitions. [2021-06-12 21:18:39,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 21:18:39,194 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:18:39,194 INFO L472 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:18:39,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:18:39,401 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:18:39,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:18:39,401 INFO L82 PathProgramCache]: Analyzing trace with hash -396491082, now seen corresponding path program 20 times [2021-06-12 21:18:39,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:18:39,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741092897] [2021-06-12 21:18:39,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:18:39,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:18:39,757 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:18:39,757 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:18:39,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741092897] [2021-06-12 21:18:39,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741092897] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:18:39,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004418507] [2021-06-12 21:18:39,758 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 [2021-06-12 21:18:39,790 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:18:39,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:18:39,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-12 21:18:39,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:18:39,866 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 [2021-06-12 21:18:39,868 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:18:39,869 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:18:39,869 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:18:39,869 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-12 21:18:39,875 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:18:39,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004418507] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:18:39,876 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:18:39,876 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2021-06-12 21:18:39,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430560427] [2021-06-12 21:18:39,876 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-12 21:18:39,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:18:39,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-12 21:18:39,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2021-06-12 21:18:39,877 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) [2021-06-12 21:18:40,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:18:40,749 INFO L93 Difference]: Finished difference Result 655 states and 1275 transitions. [2021-06-12 21:18:40,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 21:18:40,749 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 [2021-06-12 21:18:40,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:18:40,751 INFO L225 Difference]: With dead ends: 655 [2021-06-12 21:18:40,751 INFO L226 Difference]: Without dead ends: 399 [2021-06-12 21:18:40,751 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 932.1ms TimeCoverageRelationStatistics Valid=411, Invalid=2139, Unknown=0, NotChecked=0, Total=2550 [2021-06-12 21:18:40,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2021-06-12 21:18:40,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 76. [2021-06-12 21:18:40,755 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) [2021-06-12 21:18:40,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 146 transitions. [2021-06-12 21:18:40,755 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 146 transitions. Word has length 33 [2021-06-12 21:18:40,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:18:40,755 INFO L482 AbstractCegarLoop]: Abstraction has 76 states and 146 transitions. [2021-06-12 21:18:40,755 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) [2021-06-12 21:18:40,755 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 146 transitions. [2021-06-12 21:18:40,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-12 21:18:40,756 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:18:40,756 INFO L472 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:18:40,968 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-06-12 21:18:40,969 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:18:40,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:18:40,969 INFO L82 PathProgramCache]: Analyzing trace with hash 616749047, now seen corresponding path program 21 times [2021-06-12 21:18:40,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:18:40,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200682950] [2021-06-12 21:18:40,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:18:40,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:18:41,091 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:18:41,091 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:18:41,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200682950] [2021-06-12 21:18:41,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200682950] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:18:41,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535911897] [2021-06-12 21:18:41,092 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 [2021-06-12 21:18:41,138 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-12 21:18:41,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:18:41,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 21:18:41,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:18:41,223 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:18:41,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [535911897] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:18:41,223 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:18:41,223 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-12 21:18:41,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651422437] [2021-06-12 21:18:41,225 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 21:18:41,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:18:41,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 21:18:41,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-06-12 21:18:41,225 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) [2021-06-12 21:18:41,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:18:41,261 INFO L93 Difference]: Finished difference Result 468 states and 885 transitions. [2021-06-12 21:18:41,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 21:18:41,261 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 [2021-06-12 21:18:41,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:18:41,263 INFO L225 Difference]: With dead ends: 468 [2021-06-12 21:18:41,263 INFO L226 Difference]: Without dead ends: 441 [2021-06-12 21:18:41,263 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 90.4ms TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-06-12 21:18:41,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2021-06-12 21:18:41,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 363. [2021-06-12 21:18:41,269 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) [2021-06-12 21:18:41,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 755 transitions. [2021-06-12 21:18:41,270 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 755 transitions. Word has length 34 [2021-06-12 21:18:41,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:18:41,270 INFO L482 AbstractCegarLoop]: Abstraction has 363 states and 755 transitions. [2021-06-12 21:18:41,271 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) [2021-06-12 21:18:41,271 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 755 transitions. [2021-06-12 21:18:41,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-12 21:18:41,271 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:18:41,271 INFO L472 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:18:41,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-06-12 21:18:41,485 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:18:41,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:18:41,485 INFO L82 PathProgramCache]: Analyzing trace with hash 1657654978, now seen corresponding path program 22 times [2021-06-12 21:18:41,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:18:41,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223517349] [2021-06-12 21:18:41,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:18:41,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:18:41,885 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:18:41,885 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:18:41,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223517349] [2021-06-12 21:18:41,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223517349] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:18:41,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15842975] [2021-06-12 21:18:41,886 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 [2021-06-12 21:18:41,916 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:18:41,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:18:41,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 55 conjunts are in the unsatisfiable core [2021-06-12 21:18:41,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:18:41,987 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 [2021-06-12 21:18:41,988 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:18:41,989 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:18:41,989 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:18:41,990 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-12 21:18:41,995 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:18:41,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15842975] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:18:41,996 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:18:41,996 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2021-06-12 21:18:41,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860992636] [2021-06-12 21:18:41,996 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-12 21:18:41,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:18:41,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-12 21:18:41,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2021-06-12 21:18:41,997 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) [2021-06-12 21:18:42,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:18:42,961 INFO L93 Difference]: Finished difference Result 747 states and 1457 transitions. [2021-06-12 21:18:42,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 21:18:42,961 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 [2021-06-12 21:18:42,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:18:42,962 INFO L225 Difference]: With dead ends: 747 [2021-06-12 21:18:42,962 INFO L226 Difference]: Without dead ends: 457 [2021-06-12 21:18:42,963 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 1056.1ms TimeCoverageRelationStatistics Valid=471, Invalid=2499, Unknown=0, NotChecked=0, Total=2970 [2021-06-12 21:18:42,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2021-06-12 21:18:42,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 81. [2021-06-12 21:18:42,966 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) [2021-06-12 21:18:42,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 156 transitions. [2021-06-12 21:18:42,967 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 156 transitions. Word has length 35 [2021-06-12 21:18:42,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:18:42,967 INFO L482 AbstractCegarLoop]: Abstraction has 81 states and 156 transitions. [2021-06-12 21:18:42,967 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) [2021-06-12 21:18:42,967 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 156 transitions. [2021-06-12 21:18:42,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 21:18:42,967 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:18:42,967 INFO L472 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:18:43,180 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:18:43,181 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:18:43,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:18:43,181 INFO L82 PathProgramCache]: Analyzing trace with hash -129232533, now seen corresponding path program 23 times [2021-06-12 21:18:43,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:18:43,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452455389] [2021-06-12 21:18:43,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:18:43,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:18:43,310 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 105 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:18:43,310 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:18:43,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452455389] [2021-06-12 21:18:43,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452455389] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:18:43,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515523549] [2021-06-12 21:18:43,311 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 [2021-06-12 21:18:43,358 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-12 21:18:43,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:18:43,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-12 21:18:43,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:18:43,451 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 105 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:18:43,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515523549] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:18:43,451 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:18:43,451 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-06-12 21:18:43,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661362304] [2021-06-12 21:18:43,452 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 21:18:43,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:18:43,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 21:18:43,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-06-12 21:18:43,452 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) [2021-06-12 21:18:43,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:18:43,492 INFO L93 Difference]: Finished difference Result 524 states and 994 transitions. [2021-06-12 21:18:43,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 21:18:43,493 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 [2021-06-12 21:18:43,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:18:43,494 INFO L225 Difference]: With dead ends: 524 [2021-06-12 21:18:43,495 INFO L226 Difference]: Without dead ends: 495 [2021-06-12 21:18:43,495 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 101.8ms TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-06-12 21:18:43,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2021-06-12 21:18:43,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 411. [2021-06-12 21:18:43,507 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) [2021-06-12 21:18:43,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 854 transitions. [2021-06-12 21:18:43,508 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 854 transitions. Word has length 36 [2021-06-12 21:18:43,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:18:43,508 INFO L482 AbstractCegarLoop]: Abstraction has 411 states and 854 transitions. [2021-06-12 21:18:43,509 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) [2021-06-12 21:18:43,509 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 854 transitions. [2021-06-12 21:18:43,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-12 21:18:43,510 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:18:43,510 INFO L472 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:18:43,732 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-06-12 21:18:43,732 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:18:43,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:18:43,733 INFO L82 PathProgramCache]: Analyzing trace with hash -546012810, now seen corresponding path program 24 times [2021-06-12 21:18:43,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:18:43,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393923227] [2021-06-12 21:18:43,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:18:43,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:18:44,268 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:18:44,268 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:18:44,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393923227] [2021-06-12 21:18:44,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393923227] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:18:44,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2147414483] [2021-06-12 21:18:44,269 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 [2021-06-12 21:18:44,325 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-12 21:18:44,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:18:44,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 59 conjunts are in the unsatisfiable core [2021-06-12 21:18:44,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:18:44,402 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 [2021-06-12 21:18:44,403 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:18:44,404 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:18:44,405 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:18:44,405 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-12 21:18:44,410 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:18:44,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2147414483] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:18:44,411 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:18:44,411 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2021-06-12 21:18:44,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250219433] [2021-06-12 21:18:44,411 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-12 21:18:44,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:18:44,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-12 21:18:44,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2021-06-12 21:18:44,412 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) [2021-06-12 21:18:45,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:18:45,654 INFO L93 Difference]: Finished difference Result 845 states and 1651 transitions. [2021-06-12 21:18:45,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 21:18:45,654 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 [2021-06-12 21:18:45,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:18:45,657 INFO L225 Difference]: With dead ends: 845 [2021-06-12 21:18:45,657 INFO L226 Difference]: Without dead ends: 519 [2021-06-12 21:18:45,658 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 1404.6ms TimeCoverageRelationStatistics Valid=535, Invalid=2887, Unknown=0, NotChecked=0, Total=3422 [2021-06-12 21:18:45,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2021-06-12 21:18:45,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 86. [2021-06-12 21:18:45,661 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) [2021-06-12 21:18:45,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 166 transitions. [2021-06-12 21:18:45,662 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 166 transitions. Word has length 37 [2021-06-12 21:18:45,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:18:45,662 INFO L482 AbstractCegarLoop]: Abstraction has 86 states and 166 transitions. [2021-06-12 21:18:45,662 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) [2021-06-12 21:18:45,662 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 166 transitions. [2021-06-12 21:18:45,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-12 21:18:45,662 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:18:45,662 INFO L472 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:18:45,880 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:18:45,880 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:18:45,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:18:45,880 INFO L82 PathProgramCache]: Analyzing trace with hash 276542775, now seen corresponding path program 25 times [2021-06-12 21:18:45,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:18:45,880 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57872314] [2021-06-12 21:18:45,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:18:45,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:18:46,031 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 120 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:18:46,032 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:18:46,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57872314] [2021-06-12 21:18:46,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57872314] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:18:46,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451851271] [2021-06-12 21:18:46,032 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 [2021-06-12 21:18:46,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:18:46,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-12 21:18:46,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:18:46,166 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 120 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:18:46,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451851271] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:18:46,167 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:18:46,167 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 17 [2021-06-12 21:18:46,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906496170] [2021-06-12 21:18:46,167 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 21:18:46,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:18:46,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 21:18:46,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-06-12 21:18:46,168 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) [2021-06-12 21:18:46,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:18:46,203 INFO L93 Difference]: Finished difference Result 583 states and 1109 transitions. [2021-06-12 21:18:46,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 21:18:46,204 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 [2021-06-12 21:18:46,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:18:46,206 INFO L225 Difference]: With dead ends: 583 [2021-06-12 21:18:46,206 INFO L226 Difference]: Without dead ends: 552 [2021-06-12 21:18:46,206 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 113.2ms TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-06-12 21:18:46,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2021-06-12 21:18:46,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 462. [2021-06-12 21:18:46,212 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) [2021-06-12 21:18:46,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 959 transitions. [2021-06-12 21:18:46,213 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 959 transitions. Word has length 38 [2021-06-12 21:18:46,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:18:46,213 INFO L482 AbstractCegarLoop]: Abstraction has 462 states and 959 transitions. [2021-06-12 21:18:46,214 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) [2021-06-12 21:18:46,214 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 959 transitions. [2021-06-12 21:18:46,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-12 21:18:46,214 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:18:46,214 INFO L472 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:18:46,437 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-12 21:18:46,437 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:18:46,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:18:46,438 INFO L82 PathProgramCache]: Analyzing trace with hash -817344894, now seen corresponding path program 26 times [2021-06-12 21:18:46,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:18:46,438 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901461250] [2021-06-12 21:18:46,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:18:46,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:18:47,008 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:18:47,008 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:18:47,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901461250] [2021-06-12 21:18:47,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901461250] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:18:47,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322916801] [2021-06-12 21:18:47,008 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 [2021-06-12 21:18:47,040 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:18:47,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:18:47,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 63 conjunts are in the unsatisfiable core [2021-06-12 21:18:47,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:18:47,118 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 [2021-06-12 21:18:47,119 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:18:47,120 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:18:47,121 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:18:47,121 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-12 21:18:47,126 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:18:47,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1322916801] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:18:47,127 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:18:47,127 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2021-06-12 21:18:47,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289154663] [2021-06-12 21:18:47,127 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-12 21:18:47,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:18:47,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-12 21:18:47,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=993, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 21:18:47,128 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) [2021-06-12 21:18:48,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:18:48,608 INFO L93 Difference]: Finished difference Result 949 states and 1857 transitions. [2021-06-12 21:18:48,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 21:18:48,608 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 [2021-06-12 21:18:48,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:18:48,609 INFO L225 Difference]: With dead ends: 949 [2021-06-12 21:18:48,610 INFO L226 Difference]: Without dead ends: 585 [2021-06-12 21:18:48,610 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 1589.8ms TimeCoverageRelationStatistics Valid=603, Invalid=3303, Unknown=0, NotChecked=0, Total=3906 [2021-06-12 21:18:48,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2021-06-12 21:18:48,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 91. [2021-06-12 21:18:48,614 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) [2021-06-12 21:18:48,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 176 transitions. [2021-06-12 21:18:48,614 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 176 transitions. Word has length 39 [2021-06-12 21:18:48,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:18:48,614 INFO L482 AbstractCegarLoop]: Abstraction has 91 states and 176 transitions. [2021-06-12 21:18:48,614 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) [2021-06-12 21:18:48,615 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 176 transitions. [2021-06-12 21:18:48,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-12 21:18:48,615 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:18:48,615 INFO L472 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:18:48,828 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-06-12 21:18:48,829 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:18:48,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:18:48,829 INFO L82 PathProgramCache]: Analyzing trace with hash 455182763, now seen corresponding path program 27 times [2021-06-12 21:18:48,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:18:48,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868322050] [2021-06-12 21:18:48,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:18:48,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:18:48,992 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 136 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:18:48,992 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:18:48,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868322050] [2021-06-12 21:18:48,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868322050] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:18:48,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285193815] [2021-06-12 21:18:48,993 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 [2021-06-12 21:18:49,040 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-12 21:18:49,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:18:49,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-12 21:18:49,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:18:49,134 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 136 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:18:49,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285193815] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:18:49,134 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:18:49,134 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 18 [2021-06-12 21:18:49,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193670265] [2021-06-12 21:18:49,134 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 21:18:49,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:18:49,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 21:18:49,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-06-12 21:18:49,135 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) [2021-06-12 21:18:49,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:18:49,182 INFO L93 Difference]: Finished difference Result 645 states and 1230 transitions. [2021-06-12 21:18:49,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 21:18:49,182 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 [2021-06-12 21:18:49,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:18:49,184 INFO L225 Difference]: With dead ends: 645 [2021-06-12 21:18:49,184 INFO L226 Difference]: Without dead ends: 612 [2021-06-12 21:18:49,187 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 136.1ms TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-06-12 21:18:49,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2021-06-12 21:18:49,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 516. [2021-06-12 21:18:49,197 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) [2021-06-12 21:18:49,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 516 states to 516 states and 1070 transitions. [2021-06-12 21:18:49,198 INFO L78 Accepts]: Start accepts. Automaton has 516 states and 1070 transitions. Word has length 40 [2021-06-12 21:18:49,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:18:49,199 INFO L482 AbstractCegarLoop]: Abstraction has 516 states and 1070 transitions. [2021-06-12 21:18:49,199 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) [2021-06-12 21:18:49,199 INFO L276 IsEmpty]: Start isEmpty. Operand 516 states and 1070 transitions. [2021-06-12 21:18:49,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-12 21:18:49,199 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:18:49,200 INFO L472 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:18:49,412 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-12 21:18:49,413 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:18:49,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:18:49,413 INFO L82 PathProgramCache]: Analyzing trace with hash 1496120374, now seen corresponding path program 28 times [2021-06-12 21:18:49,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:18:49,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23678172] [2021-06-12 21:18:49,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:18:49,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:18:49,981 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:18:49,981 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:18:49,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23678172] [2021-06-12 21:18:49,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23678172] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:18:49,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275029814] [2021-06-12 21:18:49,981 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 [2021-06-12 21:18:50,016 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:18:50,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:18:50,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 67 conjunts are in the unsatisfiable core [2021-06-12 21:18:50,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:18:50,111 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 [2021-06-12 21:18:50,112 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:18:50,113 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:18:50,114 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:18:50,114 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-12 21:18:50,121 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:18:50,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [275029814] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:18:50,121 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:18:50,121 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2021-06-12 21:18:50,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829270302] [2021-06-12 21:18:50,122 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-12 21:18:50,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:18:50,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-12 21:18:50,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 21:18:50,123 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) [2021-06-12 21:18:51,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:18:51,539 INFO L93 Difference]: Finished difference Result 1059 states and 2075 transitions. [2021-06-12 21:18:51,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 21:18:51,540 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 [2021-06-12 21:18:51,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:18:51,541 INFO L225 Difference]: With dead ends: 1059 [2021-06-12 21:18:51,541 INFO L226 Difference]: Without dead ends: 655 [2021-06-12 21:18:51,542 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 1577.9ms TimeCoverageRelationStatistics Valid=675, Invalid=3747, Unknown=0, NotChecked=0, Total=4422 [2021-06-12 21:18:51,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2021-06-12 21:18:51,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 96. [2021-06-12 21:18:51,546 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) [2021-06-12 21:18:51,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 186 transitions. [2021-06-12 21:18:51,546 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 186 transitions. Word has length 41 [2021-06-12 21:18:51,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:18:51,546 INFO L482 AbstractCegarLoop]: Abstraction has 96 states and 186 transitions. [2021-06-12 21:18:51,546 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) [2021-06-12 21:18:51,546 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 186 transitions. [2021-06-12 21:18:51,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-12 21:18:51,547 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:18:51,547 INFO L472 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:18:51,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:18:51,761 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:18:51,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:18:51,761 INFO L82 PathProgramCache]: Analyzing trace with hash -841837961, now seen corresponding path program 29 times [2021-06-12 21:18:51,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:18:51,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390667482] [2021-06-12 21:18:51,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:18:51,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:18:51,926 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 153 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:18:51,927 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:18:51,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390667482] [2021-06-12 21:18:51,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390667482] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:18:51,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972400624] [2021-06-12 21:18:51,927 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 [2021-06-12 21:18:51,966 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-12 21:18:51,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:18:51,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 21:18:51,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:18:52,054 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 153 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:18:52,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972400624] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:18:52,055 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:18:52,055 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 19 [2021-06-12 21:18:52,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112034429] [2021-06-12 21:18:52,055 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 21:18:52,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:18:52,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 21:18:52,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-06-12 21:18:52,055 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) [2021-06-12 21:18:52,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:18:52,100 INFO L93 Difference]: Finished difference Result 710 states and 1357 transitions. [2021-06-12 21:18:52,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 21:18:52,100 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 [2021-06-12 21:18:52,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:18:52,102 INFO L225 Difference]: With dead ends: 710 [2021-06-12 21:18:52,102 INFO L226 Difference]: Without dead ends: 675 [2021-06-12 21:18:52,102 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 135.8ms TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-06-12 21:18:52,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 675 states. [2021-06-12 21:18:52,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 675 to 573. [2021-06-12 21:18:52,109 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) [2021-06-12 21:18:52,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 573 states to 573 states and 1187 transitions. [2021-06-12 21:18:52,110 INFO L78 Accepts]: Start accepts. Automaton has 573 states and 1187 transitions. Word has length 42 [2021-06-12 21:18:52,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:18:52,110 INFO L482 AbstractCegarLoop]: Abstraction has 573 states and 1187 transitions. [2021-06-12 21:18:52,110 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) [2021-06-12 21:18:52,110 INFO L276 IsEmpty]: Start isEmpty. Operand 573 states and 1187 transitions. [2021-06-12 21:18:52,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-12 21:18:52,111 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:18:52,111 INFO L472 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:18:52,324 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-06-12 21:18:52,325 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:18:52,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:18:52,325 INFO L82 PathProgramCache]: Analyzing trace with hash -1228173758, now seen corresponding path program 30 times [2021-06-12 21:18:52,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:18:52,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308367655] [2021-06-12 21:18:52,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:18:52,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:18:52,936 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:18:52,936 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:18:52,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308367655] [2021-06-12 21:18:52,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308367655] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:18:52,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081545325] [2021-06-12 21:18:52,936 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 [2021-06-12 21:18:52,974 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-12 21:18:52,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:18:52,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-12 21:18:52,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:18:54,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:18:54,664 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 [2021-06-12 21:18:54,664 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:18:54,668 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:18:54,669 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:18:54,669 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:19, output treesize:3 [2021-06-12 21:18:54,674 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 136 proven. 170 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:18:54,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081545325] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:18:54,675 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:18:54,675 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 70 [2021-06-12 21:18:54,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424049500] [2021-06-12 21:18:54,675 INFO L462 AbstractCegarLoop]: Interpolant automaton has 71 states [2021-06-12 21:18:54,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:18:54,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-06-12 21:18:54,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=700, Invalid=4270, Unknown=0, NotChecked=0, Total=4970 [2021-06-12 21:18:54,676 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) [2021-06-12 21:19:10,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:19:10,024 INFO L93 Difference]: Finished difference Result 5479 states and 10739 transitions. [2021-06-12 21:19:10,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 225 states. [2021-06-12 21:19:10,024 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 [2021-06-12 21:19:10,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:19:10,034 INFO L225 Difference]: With dead ends: 5479 [2021-06-12 21:19:10,035 INFO L226 Difference]: Without dead ends: 3672 [2021-06-12 21:19:10,039 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 274 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23730 ImplicationChecksByTransitivity, 15773.4ms TimeCoverageRelationStatistics Valid=13164, Invalid=62736, Unknown=0, NotChecked=0, Total=75900 [2021-06-12 21:19:10,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3672 states. [2021-06-12 21:19:10,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3672 to 595. [2021-06-12 21:19:10,062 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) [2021-06-12 21:19:10,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 595 states to 595 states and 1233 transitions. [2021-06-12 21:19:10,063 INFO L78 Accepts]: Start accepts. Automaton has 595 states and 1233 transitions. Word has length 43 [2021-06-12 21:19:10,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:19:10,063 INFO L482 AbstractCegarLoop]: Abstraction has 595 states and 1233 transitions. [2021-06-12 21:19:10,063 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) [2021-06-12 21:19:10,063 INFO L276 IsEmpty]: Start isEmpty. Operand 595 states and 1233 transitions. [2021-06-12 21:19:10,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-12 21:19:10,064 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:19:10,064 INFO L472 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:19:10,280 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:19:10,280 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:19:10,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:19:10,280 INFO L82 PathProgramCache]: Analyzing trace with hash -1297123594, now seen corresponding path program 31 times [2021-06-12 21:19:10,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:19:10,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50043770] [2021-06-12 21:19:10,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:19:10,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:19:11,010 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:19:11,010 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:19:11,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50043770] [2021-06-12 21:19:11,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50043770] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:19:11,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498972843] [2021-06-12 21:19:11,011 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-12 21:19:11,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:19:11,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 75 conjunts are in the unsatisfiable core [2021-06-12 21:19:11,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:19:11,138 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 [2021-06-12 21:19:11,138 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:19:11,140 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:19:11,140 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:19:11,140 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-12 21:19:11,145 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:19:11,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498972843] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:19:11,146 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:19:11,146 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2021-06-12 21:19:11,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927305620] [2021-06-12 21:19:11,146 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 21:19:11,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:19:11,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 21:19:11,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=1407, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 21:19:11,147 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) [2021-06-12 21:19:13,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:19:13,009 INFO L93 Difference]: Finished difference Result 1255 states and 2466 transitions. [2021-06-12 21:19:13,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-12 21:19:13,009 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 [2021-06-12 21:19:13,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:19:13,011 INFO L225 Difference]: With dead ends: 1255 [2021-06-12 21:19:13,011 INFO L226 Difference]: Without dead ends: 805 [2021-06-12 21:19:13,012 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 2068.2ms TimeCoverageRelationStatistics Valid=831, Invalid=4719, Unknown=0, NotChecked=0, Total=5550 [2021-06-12 21:19:13,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 805 states. [2021-06-12 21:19:13,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 805 to 106. [2021-06-12 21:19:13,016 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) [2021-06-12 21:19:13,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 206 transitions. [2021-06-12 21:19:13,016 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 206 transitions. Word has length 45 [2021-06-12 21:19:13,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:19:13,016 INFO L482 AbstractCegarLoop]: Abstraction has 106 states and 206 transitions. [2021-06-12 21:19:13,016 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) [2021-06-12 21:19:13,016 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 206 transitions. [2021-06-12 21:19:13,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-06-12 21:19:13,017 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:19:13,017 INFO L472 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:19:13,239 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-06-12 21:19:13,240 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:19:13,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:19:13,240 INFO L82 PathProgramCache]: Analyzing trace with hash -1533055049, now seen corresponding path program 32 times [2021-06-12 21:19:13,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:19:13,240 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074721782] [2021-06-12 21:19:13,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:19:13,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:19:13,454 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 190 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:19:13,455 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:19:13,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074721782] [2021-06-12 21:19:13,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074721782] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:19:13,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421105193] [2021-06-12 21:19:13,455 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 [2021-06-12 21:19:13,540 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:19:13,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:19:13,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-12 21:19:13,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:19:13,639 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 190 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:19:13,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421105193] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:19:13,640 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:19:13,640 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 21 [2021-06-12 21:19:13,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523494654] [2021-06-12 21:19:13,640 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 21:19:13,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:19:13,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 21:19:13,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2021-06-12 21:19:13,641 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) [2021-06-12 21:19:13,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:19:13,686 INFO L93 Difference]: Finished difference Result 849 states and 1629 transitions. [2021-06-12 21:19:13,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 21:19:13,687 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 [2021-06-12 21:19:13,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:19:13,688 INFO L225 Difference]: With dead ends: 849 [2021-06-12 21:19:13,688 INFO L226 Difference]: Without dead ends: 810 [2021-06-12 21:19:13,689 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 178.6ms TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2021-06-12 21:19:13,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 810 states. [2021-06-12 21:19:13,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 810 to 696. [2021-06-12 21:19:13,695 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) [2021-06-12 21:19:13,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 696 states to 696 states and 1439 transitions. [2021-06-12 21:19:13,697 INFO L78 Accepts]: Start accepts. Automaton has 696 states and 1439 transitions. Word has length 46 [2021-06-12 21:19:13,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:19:13,697 INFO L482 AbstractCegarLoop]: Abstraction has 696 states and 1439 transitions. [2021-06-12 21:19:13,697 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) [2021-06-12 21:19:13,697 INFO L276 IsEmpty]: Start isEmpty. Operand 696 states and 1439 transitions. [2021-06-12 21:19:13,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-12 21:19:13,698 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:19:13,698 INFO L472 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:19:13,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-06-12 21:19:13,913 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:19:13,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:19:13,913 INFO L82 PathProgramCache]: Analyzing trace with hash 768577026, now seen corresponding path program 33 times [2021-06-12 21:19:13,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:19:13,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683077710] [2021-06-12 21:19:13,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:19:13,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:19:14,665 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:19:14,665 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:19:14,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683077710] [2021-06-12 21:19:14,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683077710] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:19:14,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355185730] [2021-06-12 21:19:14,665 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 [2021-06-12 21:19:14,706 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-06-12 21:19:14,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:19:14,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 79 conjunts are in the unsatisfiable core [2021-06-12 21:19:14,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:19:14,822 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 [2021-06-12 21:19:14,823 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:19:14,824 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:19:14,825 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:19:14,825 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-12 21:19:14,830 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:19:14,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355185730] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:19:14,830 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:19:14,830 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2021-06-12 21:19:14,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038396756] [2021-06-12 21:19:14,830 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-06-12 21:19:14,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:19:14,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-06-12 21:19:14,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1561, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 21:19:14,831 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) [2021-06-12 21:19:16,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:19:16,888 INFO L93 Difference]: Finished difference Result 1425 states and 2801 transitions. [2021-06-12 21:19:16,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-12 21:19:16,888 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 [2021-06-12 21:19:16,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:19:16,890 INFO L225 Difference]: With dead ends: 1425 [2021-06-12 21:19:16,890 INFO L226 Difference]: Without dead ends: 889 [2021-06-12 21:19:16,891 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 2220.0ms TimeCoverageRelationStatistics Valid=915, Invalid=5247, Unknown=0, NotChecked=0, Total=6162 [2021-06-12 21:19:16,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 889 states. [2021-06-12 21:19:16,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 889 to 111. [2021-06-12 21:19:16,894 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) [2021-06-12 21:19:16,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 216 transitions. [2021-06-12 21:19:16,894 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 216 transitions. Word has length 47 [2021-06-12 21:19:16,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:19:16,894 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 216 transitions. [2021-06-12 21:19:16,894 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) [2021-06-12 21:19:16,894 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 216 transitions. [2021-06-12 21:19:16,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 21:19:16,895 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:19:16,895 INFO L472 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:19:17,114 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-06-12 21:19:17,114 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:19:17,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:19:17,115 INFO L82 PathProgramCache]: Analyzing trace with hash -1920845269, now seen corresponding path program 34 times [2021-06-12 21:19:17,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:19:17,115 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812152826] [2021-06-12 21:19:17,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:19:17,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:19:17,323 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 210 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:19:17,323 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:19:17,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812152826] [2021-06-12 21:19:17,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812152826] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:19:17,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728810493] [2021-06-12 21:19:17,323 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 [2021-06-12 21:19:17,361 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:19:17,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:19:17,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-12 21:19:17,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:19:17,481 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 210 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:19:17,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728810493] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:19:17,482 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:19:17,482 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 22 [2021-06-12 21:19:17,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453734252] [2021-06-12 21:19:17,482 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 21:19:17,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:19:17,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 21:19:17,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2021-06-12 21:19:17,483 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) [2021-06-12 21:19:17,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:19:17,545 INFO L93 Difference]: Finished difference Result 923 states and 1774 transitions. [2021-06-12 21:19:17,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 21:19:17,545 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 [2021-06-12 21:19:17,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:19:17,548 INFO L225 Difference]: With dead ends: 923 [2021-06-12 21:19:17,548 INFO L226 Difference]: Without dead ends: 882 [2021-06-12 21:19:17,548 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 178.8ms TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2021-06-12 21:19:17,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 882 states. [2021-06-12 21:19:17,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 882 to 762. [2021-06-12 21:19:17,557 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) [2021-06-12 21:19:17,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 762 states to 762 states and 1574 transitions. [2021-06-12 21:19:17,559 INFO L78 Accepts]: Start accepts. Automaton has 762 states and 1574 transitions. Word has length 48 [2021-06-12 21:19:17,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:19:17,559 INFO L482 AbstractCegarLoop]: Abstraction has 762 states and 1574 transitions. [2021-06-12 21:19:17,559 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) [2021-06-12 21:19:17,559 INFO L276 IsEmpty]: Start isEmpty. Operand 762 states and 1574 transitions. [2021-06-12 21:19:17,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-06-12 21:19:17,560 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:19:17,560 INFO L472 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:19:17,780 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-06-12 21:19:17,781 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:19:17,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:19:17,781 INFO L82 PathProgramCache]: Analyzing trace with hash -1960578634, now seen corresponding path program 35 times [2021-06-12 21:19:17,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:19:17,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019727041] [2021-06-12 21:19:17,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:19:17,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:19:18,648 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:19:18,648 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:19:18,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019727041] [2021-06-12 21:19:18,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019727041] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:19:18,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166930732] [2021-06-12 21:19:18,648 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 [2021-06-12 21:19:18,704 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-06-12 21:19:18,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:19:18,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-12 21:19:18,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:19:21,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:19:21,021 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 [2021-06-12 21:19:21,022 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:19:21,026 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:19:21,027 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:19:21,027 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:19, output treesize:3 [2021-06-12 21:19:21,032 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 190 proven. 230 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:19:21,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166930732] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:19:21,032 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:19:21,032 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 82 [2021-06-12 21:19:21,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250558921] [2021-06-12 21:19:21,033 INFO L462 AbstractCegarLoop]: Interpolant automaton has 83 states [2021-06-12 21:19:21,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:19:21,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2021-06-12 21:19:21,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=943, Invalid=5863, Unknown=0, NotChecked=0, Total=6806 [2021-06-12 21:19:21,033 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) [2021-06-12 21:19:46,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:19:46,315 INFO L93 Difference]: Finished difference Result 8032 states and 15779 transitions. [2021-06-12 21:19:46,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 294 states. [2021-06-12 21:19:46,316 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 [2021-06-12 21:19:46,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:19:46,331 INFO L225 Difference]: With dead ends: 8032 [2021-06-12 21:19:46,331 INFO L226 Difference]: Without dead ends: 5607 [2021-06-12 21:19:46,335 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 352 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41000 ImplicationChecksByTransitivity, 25473.1ms TimeCoverageRelationStatistics Valid=21491, Invalid=103471, Unknown=0, NotChecked=0, Total=124962 [2021-06-12 21:19:46,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5607 states. [2021-06-12 21:19:46,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5607 to 787. [2021-06-12 21:19:46,364 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) [2021-06-12 21:19:46,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 787 states to 787 states and 1626 transitions. [2021-06-12 21:19:46,366 INFO L78 Accepts]: Start accepts. Automaton has 787 states and 1626 transitions. Word has length 49 [2021-06-12 21:19:46,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:19:46,366 INFO L482 AbstractCegarLoop]: Abstraction has 787 states and 1626 transitions. [2021-06-12 21:19:46,366 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) [2021-06-12 21:19:46,366 INFO L276 IsEmpty]: Start isEmpty. Operand 787 states and 1626 transitions. [2021-06-12 21:19:46,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-06-12 21:19:46,367 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:19:46,367 INFO L472 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:19:46,580 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-06-12 21:19:46,581 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:19:46,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:19:46,581 INFO L82 PathProgramCache]: Analyzing trace with hash -154382910, now seen corresponding path program 36 times [2021-06-12 21:19:46,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:19:46,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321527852] [2021-06-12 21:19:46,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:19:46,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:19:47,464 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:19:47,464 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:19:47,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321527852] [2021-06-12 21:19:47,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321527852] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:19:47,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039804542] [2021-06-12 21:19:47,464 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 [2021-06-12 21:19:47,508 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-06-12 21:19:47,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:19:47,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 87 conjunts are in the unsatisfiable core [2021-06-12 21:19:47,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:19:47,606 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 [2021-06-12 21:19:47,606 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:19:47,607 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:19:47,608 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:19:47,608 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-12 21:19:47,613 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:19:47,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039804542] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:19:47,613 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:19:47,613 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2021-06-12 21:19:47,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636174182] [2021-06-12 21:19:47,613 INFO L462 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-06-12 21:19:47,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:19:47,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-06-12 21:19:47,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1893, Unknown=0, NotChecked=0, Total=1980 [2021-06-12 21:19:47,614 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) [2021-06-12 21:19:50,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:19:50,142 INFO L93 Difference]: Finished difference Result 1651 states and 3252 transitions. [2021-06-12 21:19:50,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-12 21:19:50,142 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 [2021-06-12 21:19:50,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:19:50,144 INFO L225 Difference]: With dead ends: 1651 [2021-06-12 21:19:50,144 INFO L226 Difference]: Without dead ends: 1063 [2021-06-12 21:19:50,145 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 861 ImplicationChecksByTransitivity, 2707.9ms TimeCoverageRelationStatistics Valid=1095, Invalid=6387, Unknown=0, NotChecked=0, Total=7482 [2021-06-12 21:19:50,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1063 states. [2021-06-12 21:19:50,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1063 to 121. [2021-06-12 21:19:50,150 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) [2021-06-12 21:19:50,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 236 transitions. [2021-06-12 21:19:50,150 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 236 transitions. Word has length 51 [2021-06-12 21:19:50,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:19:50,150 INFO L482 AbstractCegarLoop]: Abstraction has 121 states and 236 transitions. [2021-06-12 21:19:50,150 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) [2021-06-12 21:19:50,150 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 236 transitions. [2021-06-12 21:19:50,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-06-12 21:19:50,151 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:19:50,151 INFO L472 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:19:50,356 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-06-12 21:19:50,357 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:19:50,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:19:50,357 INFO L82 PathProgramCache]: Analyzing trace with hash -467832213, now seen corresponding path program 37 times [2021-06-12 21:19:50,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:19:50,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321695565] [2021-06-12 21:19:50,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:19:50,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:19:50,611 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 253 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:19:50,611 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:19:50,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321695565] [2021-06-12 21:19:50,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321695565] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:19:50,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031708878] [2021-06-12 21:19:50,611 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 [2021-06-12 21:19:50,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:19:50,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-12 21:19:50,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:19:50,781 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 253 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:19:50,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031708878] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:19:50,781 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:19:50,781 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 24 [2021-06-12 21:19:50,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817070842] [2021-06-12 21:19:50,782 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 21:19:50,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:19:50,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 21:19:50,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-06-12 21:19:50,782 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) [2021-06-12 21:19:50,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:19:50,851 INFO L93 Difference]: Finished difference Result 1080 states and 2082 transitions. [2021-06-12 21:19:50,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 21:19:50,852 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 [2021-06-12 21:19:50,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:19:50,854 INFO L225 Difference]: With dead ends: 1080 [2021-06-12 21:19:50,854 INFO L226 Difference]: Without dead ends: 1035 [2021-06-12 21:19:50,854 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 220.9ms TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-06-12 21:19:50,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1035 states. [2021-06-12 21:19:50,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1035 to 903. [2021-06-12 21:19:50,864 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) [2021-06-12 21:19:50,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 903 states to 903 states and 1862 transitions. [2021-06-12 21:19:50,866 INFO L78 Accepts]: Start accepts. Automaton has 903 states and 1862 transitions. Word has length 52 [2021-06-12 21:19:50,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:19:50,866 INFO L482 AbstractCegarLoop]: Abstraction has 903 states and 1862 transitions. [2021-06-12 21:19:50,866 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) [2021-06-12 21:19:50,866 INFO L276 IsEmpty]: Start isEmpty. Operand 903 states and 1862 transitions. [2021-06-12 21:19:50,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-12 21:19:50,867 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:19:50,867 INFO L472 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:19:51,076 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-06-12 21:19:51,077 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:19:51,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:19:51,077 INFO L82 PathProgramCache]: Analyzing trace with hash 1135766646, now seen corresponding path program 38 times [2021-06-12 21:19:51,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:19:51,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381903542] [2021-06-12 21:19:51,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:19:51,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:19:52,239 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:19:52,240 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:19:52,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381903542] [2021-06-12 21:19:52,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381903542] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:19:52,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936822661] [2021-06-12 21:19:52,240 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 [2021-06-12 21:19:52,279 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:19:52,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:19:52,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 91 conjunts are in the unsatisfiable core [2021-06-12 21:19:52,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:19:52,383 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 [2021-06-12 21:19:52,384 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:19:52,385 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:19:52,385 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:19:52,385 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-12 21:19:52,390 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:19:52,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936822661] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:19:52,390 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:19:52,390 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2021-06-12 21:19:52,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133232343] [2021-06-12 21:19:52,390 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-06-12 21:19:52,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:19:52,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-06-12 21:19:52,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=2071, Unknown=0, NotChecked=0, Total=2162 [2021-06-12 21:19:52,391 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) [2021-06-12 21:19:55,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:19:55,166 INFO L93 Difference]: Finished difference Result 1845 states and 3635 transitions. [2021-06-12 21:19:55,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-12 21:19:55,167 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 [2021-06-12 21:19:55,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:19:55,168 INFO L225 Difference]: With dead ends: 1845 [2021-06-12 21:19:55,168 INFO L226 Difference]: Without dead ends: 1159 [2021-06-12 21:19:55,168 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 946 ImplicationChecksByTransitivity, 3183.9ms TimeCoverageRelationStatistics Valid=1191, Invalid=6999, Unknown=0, NotChecked=0, Total=8190 [2021-06-12 21:19:55,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1159 states. [2021-06-12 21:19:55,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1159 to 126. [2021-06-12 21:19:55,172 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) [2021-06-12 21:19:55,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 246 transitions. [2021-06-12 21:19:55,173 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 246 transitions. Word has length 53 [2021-06-12 21:19:55,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:19:55,173 INFO L482 AbstractCegarLoop]: Abstraction has 126 states and 246 transitions. [2021-06-12 21:19:55,173 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) [2021-06-12 21:19:55,173 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 246 transitions. [2021-06-12 21:19:55,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-12 21:19:55,173 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:19:55,173 INFO L472 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:19:55,388 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-06-12 21:19:55,389 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:19:55,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:19:55,389 INFO L82 PathProgramCache]: Analyzing trace with hash 872098359, now seen corresponding path program 39 times [2021-06-12 21:19:55,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:19:55,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464522676] [2021-06-12 21:19:55,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:19:55,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:19:55,696 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 276 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:19:55,697 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:19:55,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464522676] [2021-06-12 21:19:55,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464522676] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:19:55,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067130486] [2021-06-12 21:19:55,697 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 [2021-06-12 21:19:55,756 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-06-12 21:19:55,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:19:55,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-12 21:19:55,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:19:55,875 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 276 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:19:55,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067130486] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:19:55,875 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:19:55,875 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24] total 25 [2021-06-12 21:19:55,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170841511] [2021-06-12 21:19:55,876 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 21:19:55,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:19:55,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 21:19:55,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2021-06-12 21:19:55,876 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) [2021-06-12 21:19:55,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:19:55,952 INFO L93 Difference]: Finished difference Result 1163 states and 2245 transitions. [2021-06-12 21:19:55,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 21:19:55,953 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 [2021-06-12 21:19:55,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:19:55,954 INFO L225 Difference]: With dead ends: 1163 [2021-06-12 21:19:55,954 INFO L226 Difference]: Without dead ends: 1116 [2021-06-12 21:19:55,954 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 271.9ms TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2021-06-12 21:19:55,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1116 states. [2021-06-12 21:19:55,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1116 to 978. [2021-06-12 21:19:55,965 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) [2021-06-12 21:19:55,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 978 states to 978 states and 2015 transitions. [2021-06-12 21:19:55,966 INFO L78 Accepts]: Start accepts. Automaton has 978 states and 2015 transitions. Word has length 54 [2021-06-12 21:19:55,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:19:55,967 INFO L482 AbstractCegarLoop]: Abstraction has 978 states and 2015 transitions. [2021-06-12 21:19:55,967 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) [2021-06-12 21:19:55,967 INFO L276 IsEmpty]: Start isEmpty. Operand 978 states and 2015 transitions. [2021-06-12 21:19:55,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-06-12 21:19:55,968 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:19:55,968 INFO L472 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:19:56,188 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:19:56,189 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:19:56,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:19:56,189 INFO L82 PathProgramCache]: Analyzing trace with hash 37342594, now seen corresponding path program 40 times [2021-06-12 21:19:56,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:19:56,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422218042] [2021-06-12 21:19:56,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:19:56,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:19:57,290 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:19:57,290 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:19:57,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422218042] [2021-06-12 21:19:57,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422218042] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:19:57,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696958217] [2021-06-12 21:19:57,290 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 [2021-06-12 21:19:57,331 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:19:57,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:19:57,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 95 conjunts are in the unsatisfiable core [2021-06-12 21:19:57,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:19:57,428 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 [2021-06-12 21:19:57,429 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:19:57,430 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:19:57,430 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:19:57,431 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-12 21:19:57,436 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:19:57,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696958217] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:19:57,436 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:19:57,436 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2021-06-12 21:19:57,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800708812] [2021-06-12 21:19:57,436 INFO L462 AbstractCegarLoop]: Interpolant automaton has 49 states [2021-06-12 21:19:57,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:19:57,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-06-12 21:19:57,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=2257, Unknown=0, NotChecked=0, Total=2352 [2021-06-12 21:19:57,437 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) [2021-06-12 21:20:00,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:20:00,526 INFO L93 Difference]: Finished difference Result 1997 states and 3937 transitions. [2021-06-12 21:20:00,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-12 21:20:00,528 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 [2021-06-12 21:20:00,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:20:00,529 INFO L225 Difference]: With dead ends: 1997 [2021-06-12 21:20:00,529 INFO L226 Difference]: Without dead ends: 1257 [2021-06-12 21:20:00,529 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1035 ImplicationChecksByTransitivity, 3359.6ms TimeCoverageRelationStatistics Valid=1291, Invalid=7639, Unknown=0, NotChecked=0, Total=8930 [2021-06-12 21:20:00,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1257 states. [2021-06-12 21:20:00,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1257 to 131. [2021-06-12 21:20:00,533 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) [2021-06-12 21:20:00,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 256 transitions. [2021-06-12 21:20:00,533 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 256 transitions. Word has length 55 [2021-06-12 21:20:00,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:20:00,534 INFO L482 AbstractCegarLoop]: Abstraction has 131 states and 256 transitions. [2021-06-12 21:20:00,534 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) [2021-06-12 21:20:00,534 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 256 transitions. [2021-06-12 21:20:00,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-12 21:20:00,534 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:20:00,534 INFO L472 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:20:00,734 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:20:00,735 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:20:00,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:20:00,735 INFO L82 PathProgramCache]: Analyzing trace with hash 1180691115, now seen corresponding path program 41 times [2021-06-12 21:20:00,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:20:00,735 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856356013] [2021-06-12 21:20:00,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:20:00,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:20:01,029 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 300 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:20:01,029 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:20:01,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856356013] [2021-06-12 21:20:01,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856356013] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:20:01,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368154538] [2021-06-12 21:20:01,030 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 [2021-06-12 21:20:01,080 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-06-12 21:20:01,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:20:01,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-12 21:20:01,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:20:01,193 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 300 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:20:01,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368154538] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:20:01,193 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:20:01,193 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 26 [2021-06-12 21:20:01,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576029990] [2021-06-12 21:20:01,193 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-12 21:20:01,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:20:01,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-12 21:20:01,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2021-06-12 21:20:01,194 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) [2021-06-12 21:20:01,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:20:01,254 INFO L93 Difference]: Finished difference Result 1249 states and 2414 transitions. [2021-06-12 21:20:01,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 21:20:01,254 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 [2021-06-12 21:20:01,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:20:01,256 INFO L225 Difference]: With dead ends: 1249 [2021-06-12 21:20:01,256 INFO L226 Difference]: Without dead ends: 1200 [2021-06-12 21:20:01,256 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 259.6ms TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2021-06-12 21:20:01,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1200 states. [2021-06-12 21:20:01,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1200 to 1056. [2021-06-12 21:20:01,267 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) [2021-06-12 21:20:01,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1056 states to 1056 states and 2174 transitions. [2021-06-12 21:20:01,269 INFO L78 Accepts]: Start accepts. Automaton has 1056 states and 2174 transitions. Word has length 56 [2021-06-12 21:20:01,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:20:01,269 INFO L482 AbstractCegarLoop]: Abstraction has 1056 states and 2174 transitions. [2021-06-12 21:20:01,269 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) [2021-06-12 21:20:01,269 INFO L276 IsEmpty]: Start isEmpty. Operand 1056 states and 2174 transitions. [2021-06-12 21:20:01,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-06-12 21:20:01,271 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:20:01,271 INFO L472 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:20:01,488 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-06-12 21:20:01,489 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:20:01,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:20:01,489 INFO L82 PathProgramCache]: Analyzing trace with hash 2139285302, now seen corresponding path program 42 times [2021-06-12 21:20:01,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:20:01,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396301187] [2021-06-12 21:20:01,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:20:01,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:20:02,711 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:20:02,711 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:20:02,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396301187] [2021-06-12 21:20:02,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396301187] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:20:02,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759721794] [2021-06-12 21:20:02,711 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 [2021-06-12 21:20:02,762 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-06-12 21:20:02,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:20:02,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 99 conjunts are in the unsatisfiable core [2021-06-12 21:20:02,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:20:02,862 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 [2021-06-12 21:20:02,863 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:20:02,864 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:20:02,865 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:20:02,865 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-12 21:20:02,870 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:20:02,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759721794] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:20:02,870 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:20:02,870 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2021-06-12 21:20:02,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601576182] [2021-06-12 21:20:02,870 INFO L462 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-06-12 21:20:02,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:20:02,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-06-12 21:20:02,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=2451, Unknown=0, NotChecked=0, Total=2550 [2021-06-12 21:20:02,871 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) [2021-06-12 21:20:06,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:20:06,255 INFO L93 Difference]: Finished difference Result 2155 states and 4251 transitions. [2021-06-12 21:20:06,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-12 21:20:06,256 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 [2021-06-12 21:20:06,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:20:06,258 INFO L225 Difference]: With dead ends: 2155 [2021-06-12 21:20:06,258 INFO L226 Difference]: Without dead ends: 1359 [2021-06-12 21:20:06,259 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1128 ImplicationChecksByTransitivity, 3732.9ms TimeCoverageRelationStatistics Valid=1395, Invalid=8307, Unknown=0, NotChecked=0, Total=9702 [2021-06-12 21:20:06,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1359 states. [2021-06-12 21:20:06,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1359 to 136. [2021-06-12 21:20:06,266 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) [2021-06-12 21:20:06,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 266 transitions. [2021-06-12 21:20:06,266 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 266 transitions. Word has length 57 [2021-06-12 21:20:06,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:20:06,266 INFO L482 AbstractCegarLoop]: Abstraction has 136 states and 266 transitions. [2021-06-12 21:20:06,266 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) [2021-06-12 21:20:06,267 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 266 transitions. [2021-06-12 21:20:06,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-06-12 21:20:06,267 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:20:06,267 INFO L472 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:20:06,480 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:20:06,481 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:20:06,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:20:06,481 INFO L82 PathProgramCache]: Analyzing trace with hash 1916405623, now seen corresponding path program 43 times [2021-06-12 21:20:06,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:20:06,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509426205] [2021-06-12 21:20:06,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:20:06,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:20:06,799 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 325 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:20:06,799 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:20:06,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509426205] [2021-06-12 21:20:06,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509426205] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:20:06,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958740783] [2021-06-12 21:20:06,800 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 [2021-06-12 21:20:06,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:20:06,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-12 21:20:06,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:20:06,977 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 325 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:20:06,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958740783] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:20:06,978 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:20:06,978 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 27 [2021-06-12 21:20:06,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725463725] [2021-06-12 21:20:06,978 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-12 21:20:06,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:20:06,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-12 21:20:06,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2021-06-12 21:20:06,979 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) [2021-06-12 21:20:07,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:20:07,048 INFO L93 Difference]: Finished difference Result 1338 states and 2589 transitions. [2021-06-12 21:20:07,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 21:20:07,048 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 [2021-06-12 21:20:07,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:20:07,050 INFO L225 Difference]: With dead ends: 1338 [2021-06-12 21:20:07,050 INFO L226 Difference]: Without dead ends: 1287 [2021-06-12 21:20:07,050 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 280.4ms TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2021-06-12 21:20:07,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1287 states. [2021-06-12 21:20:07,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1287 to 1137. [2021-06-12 21:20:07,062 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) [2021-06-12 21:20:07,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1137 states to 1137 states and 2339 transitions. [2021-06-12 21:20:07,064 INFO L78 Accepts]: Start accepts. Automaton has 1137 states and 2339 transitions. Word has length 58 [2021-06-12 21:20:07,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:20:07,064 INFO L482 AbstractCegarLoop]: Abstraction has 1137 states and 2339 transitions. [2021-06-12 21:20:07,064 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) [2021-06-12 21:20:07,064 INFO L276 IsEmpty]: Start isEmpty. Operand 1137 states and 2339 transitions. [2021-06-12 21:20:07,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-12 21:20:07,066 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:20:07,066 INFO L472 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:20:07,280 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:20:07,281 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:20:07,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:20:07,281 INFO L82 PathProgramCache]: Analyzing trace with hash -292549310, now seen corresponding path program 44 times [2021-06-12 21:20:07,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:20:07,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077171647] [2021-06-12 21:20:07,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:20:07,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:20:08,536 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:20:08,536 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:20:08,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077171647] [2021-06-12 21:20:08,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077171647] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:20:08,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824753005] [2021-06-12 21:20:08,537 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 [2021-06-12 21:20:08,585 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:20:08,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:20:08,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 103 conjunts are in the unsatisfiable core [2021-06-12 21:20:08,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:20:08,709 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 [2021-06-12 21:20:08,710 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:20:08,711 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:20:08,711 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:20:08,711 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-12 21:20:08,716 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:20:08,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824753005] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:20:08,716 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:20:08,717 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2021-06-12 21:20:08,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722786612] [2021-06-12 21:20:08,717 INFO L462 AbstractCegarLoop]: Interpolant automaton has 53 states [2021-06-12 21:20:08,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:20:08,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-06-12 21:20:08,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=2653, Unknown=0, NotChecked=0, Total=2756 [2021-06-12 21:20:08,718 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) [2021-06-12 21:20:12,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:20:12,431 INFO L93 Difference]: Finished difference Result 2319 states and 4577 transitions. [2021-06-12 21:20:12,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-12 21:20:12,431 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 [2021-06-12 21:20:12,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:20:12,434 INFO L225 Difference]: With dead ends: 2319 [2021-06-12 21:20:12,434 INFO L226 Difference]: Without dead ends: 1465 [2021-06-12 21:20:12,435 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1225 ImplicationChecksByTransitivity, 4010.0ms TimeCoverageRelationStatistics Valid=1503, Invalid=9003, Unknown=0, NotChecked=0, Total=10506 [2021-06-12 21:20:12,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1465 states. [2021-06-12 21:20:12,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1465 to 141. [2021-06-12 21:20:12,443 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) [2021-06-12 21:20:12,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 276 transitions. [2021-06-12 21:20:12,443 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 276 transitions. Word has length 59 [2021-06-12 21:20:12,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:20:12,444 INFO L482 AbstractCegarLoop]: Abstraction has 141 states and 276 transitions. [2021-06-12 21:20:12,444 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) [2021-06-12 21:20:12,444 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 276 transitions. [2021-06-12 21:20:12,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-06-12 21:20:12,444 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:20:12,444 INFO L472 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:20:12,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-06-12 21:20:12,665 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:20:12,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:20:12,665 INFO L82 PathProgramCache]: Analyzing trace with hash -456023317, now seen corresponding path program 45 times [2021-06-12 21:20:12,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:20:12,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479811624] [2021-06-12 21:20:12,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:20:12,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:20:13,021 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 351 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:20:13,021 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:20:13,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479811624] [2021-06-12 21:20:13,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479811624] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:20:13,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748495475] [2021-06-12 21:20:13,021 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 [2021-06-12 21:20:13,106 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-06-12 21:20:13,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:20:13,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 52 conjunts are in the unsatisfiable core [2021-06-12 21:20:13,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:20:13,235 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 351 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:20:13,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748495475] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:20:13,235 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:20:13,236 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 28 [2021-06-12 21:20:13,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554636110] [2021-06-12 21:20:13,236 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-12 21:20:13,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:20:13,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-12 21:20:13,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2021-06-12 21:20:13,236 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) [2021-06-12 21:20:13,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:20:13,322 INFO L93 Difference]: Finished difference Result 1430 states and 2770 transitions. [2021-06-12 21:20:13,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 21:20:13,323 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 [2021-06-12 21:20:13,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:20:13,325 INFO L225 Difference]: With dead ends: 1430 [2021-06-12 21:20:13,325 INFO L226 Difference]: Without dead ends: 1377 [2021-06-12 21:20:13,325 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 317.7ms TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2021-06-12 21:20:13,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1377 states. [2021-06-12 21:20:13,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1377 to 1221. [2021-06-12 21:20:13,338 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) [2021-06-12 21:20:13,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1221 states to 1221 states and 2510 transitions. [2021-06-12 21:20:13,346 INFO L78 Accepts]: Start accepts. Automaton has 1221 states and 2510 transitions. Word has length 60 [2021-06-12 21:20:13,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:20:13,346 INFO L482 AbstractCegarLoop]: Abstraction has 1221 states and 2510 transitions. [2021-06-12 21:20:13,346 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) [2021-06-12 21:20:13,346 INFO L276 IsEmpty]: Start isEmpty. Operand 1221 states and 2510 transitions. [2021-06-12 21:20:13,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-06-12 21:20:13,348 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:20:13,348 INFO L472 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:20:13,571 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-06-12 21:20:13,571 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:20:13,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:20:13,572 INFO L82 PathProgramCache]: Analyzing trace with hash -1547869706, now seen corresponding path program 46 times [2021-06-12 21:20:13,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:20:13,572 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129759435] [2021-06-12 21:20:13,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:20:13,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:20:14,888 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:20:14,888 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:20:14,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129759435] [2021-06-12 21:20:14,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129759435] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:20:14,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241549429] [2021-06-12 21:20:14,888 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 [2021-06-12 21:20:14,945 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:20:14,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:20:14,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 107 conjunts are in the unsatisfiable core [2021-06-12 21:20:14,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:20:15,068 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 [2021-06-12 21:20:15,069 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:20:15,070 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:20:15,071 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:20:15,071 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-12 21:20:15,076 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:20:15,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241549429] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:20:15,076 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:20:15,076 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2021-06-12 21:20:15,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795636645] [2021-06-12 21:20:15,076 INFO L462 AbstractCegarLoop]: Interpolant automaton has 55 states [2021-06-12 21:20:15,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:20:15,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-06-12 21:20:15,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=2863, Unknown=0, NotChecked=0, Total=2970 [2021-06-12 21:20:15,077 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) [2021-06-12 21:20:19,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:20:19,118 INFO L93 Difference]: Finished difference Result 2489 states and 4915 transitions. [2021-06-12 21:20:19,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-12 21:20:19,118 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 [2021-06-12 21:20:19,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:20:19,120 INFO L225 Difference]: With dead ends: 2489 [2021-06-12 21:20:19,120 INFO L226 Difference]: Without dead ends: 1575 [2021-06-12 21:20:19,120 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1326 ImplicationChecksByTransitivity, 4336.9ms TimeCoverageRelationStatistics Valid=1615, Invalid=9727, Unknown=0, NotChecked=0, Total=11342 [2021-06-12 21:20:19,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1575 states. [2021-06-12 21:20:19,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1575 to 146. [2021-06-12 21:20:19,125 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) [2021-06-12 21:20:19,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 286 transitions. [2021-06-12 21:20:19,126 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 286 transitions. Word has length 61 [2021-06-12 21:20:19,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:20:19,126 INFO L482 AbstractCegarLoop]: Abstraction has 146 states and 286 transitions. [2021-06-12 21:20:19,126 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) [2021-06-12 21:20:19,126 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 286 transitions. [2021-06-12 21:20:19,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-06-12 21:20:19,126 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:20:19,126 INFO L472 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:20:19,327 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-06-12 21:20:19,327 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:20:19,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:20:19,327 INFO L82 PathProgramCache]: Analyzing trace with hash -716249929, now seen corresponding path program 47 times [2021-06-12 21:20:19,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:20:19,327 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533800031] [2021-06-12 21:20:19,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:20:19,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:20:19,716 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 378 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:20:19,717 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:20:19,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533800031] [2021-06-12 21:20:19,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533800031] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:20:19,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072851920] [2021-06-12 21:20:19,717 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 [2021-06-12 21:20:19,783 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2021-06-12 21:20:19,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:20:19,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 54 conjunts are in the unsatisfiable core [2021-06-12 21:20:19,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:20:19,936 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 378 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:20:19,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072851920] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:20:19,937 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:20:19,937 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28] total 29 [2021-06-12 21:20:19,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98805398] [2021-06-12 21:20:19,937 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-12 21:20:19,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:20:19,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-12 21:20:19,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2021-06-12 21:20:19,938 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) [2021-06-12 21:20:20,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:20:20,030 INFO L93 Difference]: Finished difference Result 1525 states and 2957 transitions. [2021-06-12 21:20:20,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 21:20:20,030 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 [2021-06-12 21:20:20,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:20:20,032 INFO L225 Difference]: With dead ends: 1525 [2021-06-12 21:20:20,032 INFO L226 Difference]: Without dead ends: 1470 [2021-06-12 21:20:20,033 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 349.7ms TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2021-06-12 21:20:20,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1470 states. [2021-06-12 21:20:20,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1470 to 1308. [2021-06-12 21:20:20,047 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) [2021-06-12 21:20:20,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1308 states to 1308 states and 2687 transitions. [2021-06-12 21:20:20,049 INFO L78 Accepts]: Start accepts. Automaton has 1308 states and 2687 transitions. Word has length 62 [2021-06-12 21:20:20,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:20:20,049 INFO L482 AbstractCegarLoop]: Abstraction has 1308 states and 2687 transitions. [2021-06-12 21:20:20,049 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) [2021-06-12 21:20:20,049 INFO L276 IsEmpty]: Start isEmpty. Operand 1308 states and 2687 transitions. [2021-06-12 21:20:20,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-06-12 21:20:20,051 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:20:20,051 INFO L472 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:20:20,272 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:20:20,273 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:20:20,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:20:20,273 INFO L82 PathProgramCache]: Analyzing trace with hash -2008609534, now seen corresponding path program 48 times [2021-06-12 21:20:20,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:20:20,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457694169] [2021-06-12 21:20:20,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:20:20,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:20:21,732 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:20:21,733 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:20:21,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457694169] [2021-06-12 21:20:21,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457694169] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:20:21,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044259983] [2021-06-12 21:20:21,733 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 [2021-06-12 21:20:21,786 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-06-12 21:20:21,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:20:21,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 111 conjunts are in the unsatisfiable core [2021-06-12 21:20:21,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:20:21,905 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 [2021-06-12 21:20:21,906 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:20:21,907 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:20:21,907 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:20:21,907 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-12 21:20:21,913 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:20:21,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044259983] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:20:21,913 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:20:21,913 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2021-06-12 21:20:21,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831729055] [2021-06-12 21:20:21,913 INFO L462 AbstractCegarLoop]: Interpolant automaton has 57 states [2021-06-12 21:20:21,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:20:21,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-06-12 21:20:21,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=3081, Unknown=0, NotChecked=0, Total=3192 [2021-06-12 21:20:21,914 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) [2021-06-12 21:20:26,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:20:26,291 INFO L93 Difference]: Finished difference Result 2665 states and 5265 transitions. [2021-06-12 21:20:26,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-12 21:20:26,292 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 [2021-06-12 21:20:26,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:20:26,294 INFO L225 Difference]: With dead ends: 2665 [2021-06-12 21:20:26,294 INFO L226 Difference]: Without dead ends: 1689 [2021-06-12 21:20:26,294 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1431 ImplicationChecksByTransitivity, 4717.6ms TimeCoverageRelationStatistics Valid=1731, Invalid=10479, Unknown=0, NotChecked=0, Total=12210 [2021-06-12 21:20:26,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1689 states. [2021-06-12 21:20:26,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1689 to 151. [2021-06-12 21:20:26,299 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) [2021-06-12 21:20:26,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 296 transitions. [2021-06-12 21:20:26,300 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 296 transitions. Word has length 63 [2021-06-12 21:20:26,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:20:26,300 INFO L482 AbstractCegarLoop]: Abstraction has 151 states and 296 transitions. [2021-06-12 21:20:26,300 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) [2021-06-12 21:20:26,300 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 296 transitions. [2021-06-12 21:20:26,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-06-12 21:20:26,300 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:20:26,300 INFO L472 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:20:26,500 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-06-12 21:20:26,501 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:20:26,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:20:26,501 INFO L82 PathProgramCache]: Analyzing trace with hash -2114282709, now seen corresponding path program 49 times [2021-06-12 21:20:26,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:20:26,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081829054] [2021-06-12 21:20:26,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:20:26,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:20:26,914 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 406 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:20:26,914 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:20:26,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081829054] [2021-06-12 21:20:26,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081829054] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:20:26,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330275101] [2021-06-12 21:20:26,915 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 [2021-06-12 21:20:26,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:20:26,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 56 conjunts are in the unsatisfiable core [2021-06-12 21:20:26,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:20:27,126 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 406 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:20:27,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330275101] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:20:27,127 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:20:27,127 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 30 [2021-06-12 21:20:27,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286431344] [2021-06-12 21:20:27,127 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-12 21:20:27,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:20:27,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-12 21:20:27,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2021-06-12 21:20:27,128 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) [2021-06-12 21:20:27,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:20:27,206 INFO L93 Difference]: Finished difference Result 1623 states and 3150 transitions. [2021-06-12 21:20:27,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 21:20:27,207 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 [2021-06-12 21:20:27,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:20:27,208 INFO L225 Difference]: With dead ends: 1623 [2021-06-12 21:20:27,208 INFO L226 Difference]: Without dead ends: 1566 [2021-06-12 21:20:27,209 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 369.2ms TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2021-06-12 21:20:27,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1566 states. [2021-06-12 21:20:27,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1566 to 1398. [2021-06-12 21:20:27,223 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) [2021-06-12 21:20:27,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1398 states to 1398 states and 2870 transitions. [2021-06-12 21:20:27,225 INFO L78 Accepts]: Start accepts. Automaton has 1398 states and 2870 transitions. Word has length 64 [2021-06-12 21:20:27,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:20:27,225 INFO L482 AbstractCegarLoop]: Abstraction has 1398 states and 2870 transitions. [2021-06-12 21:20:27,225 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) [2021-06-12 21:20:27,225 INFO L276 IsEmpty]: Start isEmpty. Operand 1398 states and 2870 transitions. [2021-06-12 21:20:27,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 21:20:27,227 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:20:27,227 INFO L472 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:20:27,450 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:20:27,450 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:20:27,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:20:27,451 INFO L82 PathProgramCache]: Analyzing trace with hash 1468652726, now seen corresponding path program 50 times [2021-06-12 21:20:27,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:20:27,451 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139667656] [2021-06-12 21:20:27,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:20:27,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:20:29,155 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:20:29,155 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:20:29,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139667656] [2021-06-12 21:20:29,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139667656] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:20:29,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112776155] [2021-06-12 21:20:29,155 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-12 21:20:29,202 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:20:29,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:20:29,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 115 conjunts are in the unsatisfiable core [2021-06-12 21:20:29,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:20:29,334 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 [2021-06-12 21:20:29,335 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:20:29,336 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:20:29,336 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:20:29,336 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-12 21:20:29,341 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:20:29,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112776155] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:20:29,341 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:20:29,341 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2021-06-12 21:20:29,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712070135] [2021-06-12 21:20:29,342 INFO L462 AbstractCegarLoop]: Interpolant automaton has 59 states [2021-06-12 21:20:29,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:20:29,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-06-12 21:20:29,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=3307, Unknown=0, NotChecked=0, Total=3422 [2021-06-12 21:20:29,342 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) [2021-06-12 21:20:34,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:20:34,083 INFO L93 Difference]: Finished difference Result 2847 states and 5627 transitions. [2021-06-12 21:20:34,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-12 21:20:34,083 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 [2021-06-12 21:20:34,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:20:34,086 INFO L225 Difference]: With dead ends: 2847 [2021-06-12 21:20:34,086 INFO L226 Difference]: Without dead ends: 1807 [2021-06-12 21:20:34,087 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1540 ImplicationChecksByTransitivity, 5276.7ms TimeCoverageRelationStatistics Valid=1851, Invalid=11259, Unknown=0, NotChecked=0, Total=13110 [2021-06-12 21:20:34,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1807 states. [2021-06-12 21:20:34,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1807 to 156. [2021-06-12 21:20:34,096 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) [2021-06-12 21:20:34,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 306 transitions. [2021-06-12 21:20:34,096 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 306 transitions. Word has length 65 [2021-06-12 21:20:34,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:20:34,096 INFO L482 AbstractCegarLoop]: Abstraction has 156 states and 306 transitions. [2021-06-12 21:20:34,096 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) [2021-06-12 21:20:34,097 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 306 transitions. [2021-06-12 21:20:34,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-06-12 21:20:34,097 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:20:34,097 INFO L472 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:20:34,321 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:20:34,322 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:20:34,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:20:34,322 INFO L82 PathProgramCache]: Analyzing trace with hash -1693335049, now seen corresponding path program 51 times [2021-06-12 21:20:34,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:20:34,322 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056459282] [2021-06-12 21:20:34,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:20:34,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:20:34,814 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 435 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:20:34,814 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:20:34,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056459282] [2021-06-12 21:20:34,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056459282] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:20:34,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282995453] [2021-06-12 21:20:34,815 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 [2021-06-12 21:20:34,892 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-06-12 21:20:34,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:20:34,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 58 conjunts are in the unsatisfiable core [2021-06-12 21:20:34,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:20:35,036 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 435 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:20:35,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282995453] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:20:35,037 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:20:35,038 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30] total 31 [2021-06-12 21:20:35,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945564933] [2021-06-12 21:20:35,038 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-12 21:20:35,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:20:35,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-12 21:20:35,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2021-06-12 21:20:35,039 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) [2021-06-12 21:20:35,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:20:35,142 INFO L93 Difference]: Finished difference Result 1724 states and 3349 transitions. [2021-06-12 21:20:35,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 21:20:35,142 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 [2021-06-12 21:20:35,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:20:35,144 INFO L225 Difference]: With dead ends: 1724 [2021-06-12 21:20:35,144 INFO L226 Difference]: Without dead ends: 1665 [2021-06-12 21:20:35,145 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 448.9ms TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2021-06-12 21:20:35,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1665 states. [2021-06-12 21:20:35,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1665 to 1491. [2021-06-12 21:20:35,166 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) [2021-06-12 21:20:35,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1491 states to 1491 states and 3059 transitions. [2021-06-12 21:20:35,168 INFO L78 Accepts]: Start accepts. Automaton has 1491 states and 3059 transitions. Word has length 66 [2021-06-12 21:20:35,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:20:35,168 INFO L482 AbstractCegarLoop]: Abstraction has 1491 states and 3059 transitions. [2021-06-12 21:20:35,168 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) [2021-06-12 21:20:35,168 INFO L276 IsEmpty]: Start isEmpty. Operand 1491 states and 3059 transitions. [2021-06-12 21:20:35,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-06-12 21:20:35,170 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:20:35,170 INFO L472 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:20:35,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-06-12 21:20:35,385 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:20:35,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:20:35,385 INFO L82 PathProgramCache]: Analyzing trace with hash 1238813890, now seen corresponding path program 52 times [2021-06-12 21:20:35,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:20:35,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957148204] [2021-06-12 21:20:35,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:20:35,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:20:36,978 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:20:36,978 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:20:36,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957148204] [2021-06-12 21:20:36,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957148204] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:20:36,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500496768] [2021-06-12 21:20:36,979 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 [2021-06-12 21:20:37,026 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:20:37,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:20:37,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 119 conjunts are in the unsatisfiable core [2021-06-12 21:20:37,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:20:37,143 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 [2021-06-12 21:20:37,144 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:20:37,145 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:20:37,145 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:20:37,146 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-12 21:20:37,150 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:20:37,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500496768] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:20:37,151 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:20:37,151 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 60 [2021-06-12 21:20:37,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728522739] [2021-06-12 21:20:37,151 INFO L462 AbstractCegarLoop]: Interpolant automaton has 61 states [2021-06-12 21:20:37,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:20:37,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-06-12 21:20:37,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=3541, Unknown=0, NotChecked=0, Total=3660 [2021-06-12 21:20:37,151 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) [2021-06-12 21:20:42,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:20:42,236 INFO L93 Difference]: Finished difference Result 3035 states and 6001 transitions. [2021-06-12 21:20:42,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-12 21:20:42,236 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 [2021-06-12 21:20:42,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:20:42,238 INFO L225 Difference]: With dead ends: 3035 [2021-06-12 21:20:42,238 INFO L226 Difference]: Without dead ends: 1929 [2021-06-12 21:20:42,239 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 65 SyntacticMatches, 2 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1653 ImplicationChecksByTransitivity, 5440.2ms TimeCoverageRelationStatistics Valid=1975, Invalid=12067, Unknown=0, NotChecked=0, Total=14042 [2021-06-12 21:20:42,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1929 states. [2021-06-12 21:20:42,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1929 to 161. [2021-06-12 21:20:42,244 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) [2021-06-12 21:20:42,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 316 transitions. [2021-06-12 21:20:42,245 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 316 transitions. Word has length 67 [2021-06-12 21:20:42,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:20:42,245 INFO L482 AbstractCegarLoop]: Abstraction has 161 states and 316 transitions. [2021-06-12 21:20:42,245 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) [2021-06-12 21:20:42,245 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 316 transitions. [2021-06-12 21:20:42,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-06-12 21:20:42,245 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:20:42,245 INFO L472 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:20:42,445 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:20:42,446 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:20:42,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:20:42,446 INFO L82 PathProgramCache]: Analyzing trace with hash -228404373, now seen corresponding path program 53 times [2021-06-12 21:20:42,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:20:42,446 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637273449] [2021-06-12 21:20:42,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:20:42,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:20:42,917 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 465 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:20:42,917 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:20:42,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637273449] [2021-06-12 21:20:42,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637273449] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:20:42,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81654408] [2021-06-12 21:20:42,917 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 [2021-06-12 21:20:43,012 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-06-12 21:20:43,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:20:43,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 60 conjunts are in the unsatisfiable core [2021-06-12 21:20:43,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:20:43,185 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 465 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:20:43,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [81654408] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:20:43,185 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:20:43,185 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31] total 32 [2021-06-12 21:20:43,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210151519] [2021-06-12 21:20:43,186 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-12 21:20:43,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:20:43,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-12 21:20:43,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 21:20:43,186 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) [2021-06-12 21:20:43,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:20:43,268 INFO L93 Difference]: Finished difference Result 1828 states and 3554 transitions. [2021-06-12 21:20:43,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 21:20:43,268 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 [2021-06-12 21:20:43,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:20:43,269 INFO L225 Difference]: With dead ends: 1828 [2021-06-12 21:20:43,269 INFO L226 Difference]: Without dead ends: 1767 [2021-06-12 21:20:43,269 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 428.4ms TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 21:20:43,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1767 states. [2021-06-12 21:20:43,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1767 to 1587. [2021-06-12 21:20:43,280 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) [2021-06-12 21:20:43,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1587 states to 1587 states and 3254 transitions. [2021-06-12 21:20:43,282 INFO L78 Accepts]: Start accepts. Automaton has 1587 states and 3254 transitions. Word has length 68 [2021-06-12 21:20:43,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:20:43,282 INFO L482 AbstractCegarLoop]: Abstraction has 1587 states and 3254 transitions. [2021-06-12 21:20:43,282 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) [2021-06-12 21:20:43,283 INFO L276 IsEmpty]: Start isEmpty. Operand 1587 states and 3254 transitions. [2021-06-12 21:20:43,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-06-12 21:20:43,284 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:20:43,284 INFO L472 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:20:43,507 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-06-12 21:20:43,507 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:20:43,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:20:43,508 INFO L82 PathProgramCache]: Analyzing trace with hash 68179830, now seen corresponding path program 54 times [2021-06-12 21:20:43,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:20:43,508 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562452188] [2021-06-12 21:20:43,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:20:43,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:20:45,380 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:20:45,380 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:20:45,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562452188] [2021-06-12 21:20:45,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562452188] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:20:45,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484989236] [2021-06-12 21:20:45,380 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 [2021-06-12 21:20:45,436 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-06-12 21:20:45,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:20:45,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 123 conjunts are in the unsatisfiable core [2021-06-12 21:20:45,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:20:45,557 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 [2021-06-12 21:20:45,558 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:20:45,559 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:20:45,560 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:20:45,560 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-12 21:20:45,565 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:20:45,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1484989236] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:20:45,565 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:20:45,565 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 62 [2021-06-12 21:20:45,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988449098] [2021-06-12 21:20:45,565 INFO L462 AbstractCegarLoop]: Interpolant automaton has 63 states [2021-06-12 21:20:45,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:20:45,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-06-12 21:20:45,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2021-06-12 21:20:45,566 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) [2021-06-12 21:20:51,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:20:51,160 INFO L93 Difference]: Finished difference Result 3229 states and 6387 transitions. [2021-06-12 21:20:51,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-12 21:20:51,161 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 [2021-06-12 21:20:51,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:20:51,162 INFO L225 Difference]: With dead ends: 3229 [2021-06-12 21:20:51,162 INFO L226 Difference]: Without dead ends: 2055 [2021-06-12 21:20:51,163 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1770 ImplicationChecksByTransitivity, 6128.1ms TimeCoverageRelationStatistics Valid=2103, Invalid=12903, Unknown=0, NotChecked=0, Total=15006 [2021-06-12 21:20:51,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2055 states. [2021-06-12 21:20:51,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2055 to 166. [2021-06-12 21:20:51,168 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) [2021-06-12 21:20:51,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 326 transitions. [2021-06-12 21:20:51,169 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 326 transitions. Word has length 69 [2021-06-12 21:20:51,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:20:51,169 INFO L482 AbstractCegarLoop]: Abstraction has 166 states and 326 transitions. [2021-06-12 21:20:51,169 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) [2021-06-12 21:20:51,169 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 326 transitions. [2021-06-12 21:20:51,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-06-12 21:20:51,169 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:20:51,169 INFO L472 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:20:51,369 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-06-12 21:20:51,370 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:20:51,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:20:51,370 INFO L82 PathProgramCache]: Analyzing trace with hash 2136645431, now seen corresponding path program 55 times [2021-06-12 21:20:51,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:20:51,370 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395942064] [2021-06-12 21:20:51,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:20:51,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:20:51,812 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 496 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:20:51,812 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:20:51,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395942064] [2021-06-12 21:20:51,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395942064] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:20:51,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682100155] [2021-06-12 21:20:51,813 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 [2021-06-12 21:20:51,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:20:51,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 62 conjunts are in the unsatisfiable core [2021-06-12 21:20:51,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:20:52,007 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 496 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:20:52,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682100155] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:20:52,008 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:20:52,008 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32] total 33 [2021-06-12 21:20:52,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142106466] [2021-06-12 21:20:52,008 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-12 21:20:52,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:20:52,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-12 21:20:52,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 21:20:52,009 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) [2021-06-12 21:20:52,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:20:52,097 INFO L93 Difference]: Finished difference Result 1935 states and 3765 transitions. [2021-06-12 21:20:52,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 21:20:52,098 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 [2021-06-12 21:20:52,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:20:52,099 INFO L225 Difference]: With dead ends: 1935 [2021-06-12 21:20:52,099 INFO L226 Difference]: Without dead ends: 1872 [2021-06-12 21:20:52,099 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 399.6ms TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 21:20:52,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1872 states. [2021-06-12 21:20:52,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1872 to 1686. [2021-06-12 21:20:52,111 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) [2021-06-12 21:20:52,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1686 states to 1686 states and 3455 transitions. [2021-06-12 21:20:52,112 INFO L78 Accepts]: Start accepts. Automaton has 1686 states and 3455 transitions. Word has length 70 [2021-06-12 21:20:52,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:20:52,112 INFO L482 AbstractCegarLoop]: Abstraction has 1686 states and 3455 transitions. [2021-06-12 21:20:52,113 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) [2021-06-12 21:20:52,113 INFO L276 IsEmpty]: Start isEmpty. Operand 1686 states and 3455 transitions. [2021-06-12 21:20:52,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-06-12 21:20:52,114 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:20:52,114 INFO L472 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:20:52,314 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:20:52,314 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:20:52,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:20:52,315 INFO L82 PathProgramCache]: Analyzing trace with hash -608744318, now seen corresponding path program 56 times [2021-06-12 21:20:52,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:20:52,315 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319997331] [2021-06-12 21:20:52,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:20:52,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:20:54,096 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:20:54,096 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:20:54,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319997331] [2021-06-12 21:20:54,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319997331] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:20:54,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881854619] [2021-06-12 21:20:54,097 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 [2021-06-12 21:20:54,144 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:20:54,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:20:54,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 127 conjunts are in the unsatisfiable core [2021-06-12 21:20:54,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:20:54,269 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 [2021-06-12 21:20:54,270 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:20:54,271 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:20:54,271 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:20:54,271 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-12 21:20:54,276 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:20:54,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [881854619] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:20:54,276 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:20:54,276 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 64 [2021-06-12 21:20:54,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012997569] [2021-06-12 21:20:54,277 INFO L462 AbstractCegarLoop]: Interpolant automaton has 65 states [2021-06-12 21:20:54,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:20:54,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-06-12 21:20:54,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=4033, Unknown=0, NotChecked=0, Total=4160 [2021-06-12 21:20:54,277 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) [2021-06-12 21:21:00,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:21:00,326 INFO L93 Difference]: Finished difference Result 3429 states and 6785 transitions. [2021-06-12 21:21:00,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-12 21:21:00,327 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 [2021-06-12 21:21:00,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:21:00,329 INFO L225 Difference]: With dead ends: 3429 [2021-06-12 21:21:00,329 INFO L226 Difference]: Without dead ends: 2185 [2021-06-12 21:21:00,330 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 69 SyntacticMatches, 2 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1891 ImplicationChecksByTransitivity, 6353.1ms TimeCoverageRelationStatistics Valid=2235, Invalid=13767, Unknown=0, NotChecked=0, Total=16002 [2021-06-12 21:21:00,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2185 states. [2021-06-12 21:21:00,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2185 to 171. [2021-06-12 21:21:00,339 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) [2021-06-12 21:21:00,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 336 transitions. [2021-06-12 21:21:00,339 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 336 transitions. Word has length 71 [2021-06-12 21:21:00,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:21:00,339 INFO L482 AbstractCegarLoop]: Abstraction has 171 states and 336 transitions. [2021-06-12 21:21:00,339 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) [2021-06-12 21:21:00,339 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 336 transitions. [2021-06-12 21:21:00,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-06-12 21:21:00,340 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:21:00,340 INFO L472 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:21:00,563 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-06-12 21:21:00,563 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:21:00,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:21:00,564 INFO L82 PathProgramCache]: Analyzing trace with hash -1668133973, now seen corresponding path program 57 times [2021-06-12 21:21:00,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:21:00,564 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527906392] [2021-06-12 21:21:00,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:21:00,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:21:01,032 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 528 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:21:01,032 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:21:01,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527906392] [2021-06-12 21:21:01,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527906392] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:21:01,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457912522] [2021-06-12 21:21:01,032 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 [2021-06-12 21:21:01,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2021-06-12 21:21:01,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:21:01,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 64 conjunts are in the unsatisfiable core [2021-06-12 21:21:01,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:21:01,239 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 528 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:21:01,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457912522] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:21:01,239 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:21:01,240 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33] total 34 [2021-06-12 21:21:01,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514554135] [2021-06-12 21:21:01,240 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-12 21:21:01,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:21:01,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-12 21:21:01,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 21:21:01,240 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) [2021-06-12 21:21:01,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:21:01,339 INFO L93 Difference]: Finished difference Result 2045 states and 3982 transitions. [2021-06-12 21:21:01,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-12 21:21:01,340 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 [2021-06-12 21:21:01,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:21:01,341 INFO L225 Difference]: With dead ends: 2045 [2021-06-12 21:21:01,341 INFO L226 Difference]: Without dead ends: 1980 [2021-06-12 21:21:01,342 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 426.4ms TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 21:21:01,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1980 states. [2021-06-12 21:21:01,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1980 to 1788. [2021-06-12 21:21:01,353 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) [2021-06-12 21:21:01,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1788 states to 1788 states and 3662 transitions. [2021-06-12 21:21:01,355 INFO L78 Accepts]: Start accepts. Automaton has 1788 states and 3662 transitions. Word has length 72 [2021-06-12 21:21:01,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:21:01,355 INFO L482 AbstractCegarLoop]: Abstraction has 1788 states and 3662 transitions. [2021-06-12 21:21:01,355 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) [2021-06-12 21:21:01,355 INFO L276 IsEmpty]: Start isEmpty. Operand 1788 states and 3662 transitions. [2021-06-12 21:21:01,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-06-12 21:21:01,356 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:21:01,356 INFO L472 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:21:01,557 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:21:01,557 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:21:01,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:21:01,557 INFO L82 PathProgramCache]: Analyzing trace with hash 1417204278, now seen corresponding path program 58 times [2021-06-12 21:21:01,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:21:01,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030703202] [2021-06-12 21:21:01,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:21:01,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:21:03,461 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:21:03,461 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:21:03,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030703202] [2021-06-12 21:21:03,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030703202] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:21:03,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259898979] [2021-06-12 21:21:03,461 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 [2021-06-12 21:21:03,509 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:21:03,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:21:03,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 131 conjunts are in the unsatisfiable core [2021-06-12 21:21:03,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:21:03,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 21:21:03,674 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:21:03,675 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:21:03,676 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:21:03,676 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-12 21:21:03,681 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:21:03,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259898979] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:21:03,681 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:21:03,681 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 66 [2021-06-12 21:21:03,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553217941] [2021-06-12 21:21:03,682 INFO L462 AbstractCegarLoop]: Interpolant automaton has 67 states [2021-06-12 21:21:03,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:21:03,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-06-12 21:21:03,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=4291, Unknown=0, NotChecked=0, Total=4422 [2021-06-12 21:21:03,682 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) [2021-06-12 21:21:10,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:21:10,083 INFO L93 Difference]: Finished difference Result 3635 states and 7195 transitions. [2021-06-12 21:21:10,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-12 21:21:10,083 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 [2021-06-12 21:21:10,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:21:10,085 INFO L225 Difference]: With dead ends: 3635 [2021-06-12 21:21:10,085 INFO L226 Difference]: Without dead ends: 2319 [2021-06-12 21:21:10,086 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 71 SyntacticMatches, 2 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2016 ImplicationChecksByTransitivity, 6779.9ms TimeCoverageRelationStatistics Valid=2371, Invalid=14659, Unknown=0, NotChecked=0, Total=17030 [2021-06-12 21:21:10,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2319 states. [2021-06-12 21:21:10,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2319 to 176. [2021-06-12 21:21:10,092 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) [2021-06-12 21:21:10,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 346 transitions. [2021-06-12 21:21:10,093 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 346 transitions. Word has length 73 [2021-06-12 21:21:10,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:21:10,093 INFO L482 AbstractCegarLoop]: Abstraction has 176 states and 346 transitions. [2021-06-12 21:21:10,093 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) [2021-06-12 21:21:10,093 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 346 transitions. [2021-06-12 21:21:10,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-06-12 21:21:10,093 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:21:10,094 INFO L472 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:21:10,295 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-06-12 21:21:10,295 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:21:10,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:21:10,296 INFO L82 PathProgramCache]: Analyzing trace with hash 1006730359, now seen corresponding path program 59 times [2021-06-12 21:21:10,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:21:10,296 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917898748] [2021-06-12 21:21:10,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:21:10,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:21:10,796 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 561 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:21:10,796 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:21:10,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917898748] [2021-06-12 21:21:10,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917898748] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:21:10,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469333378] [2021-06-12 21:21:10,797 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 [2021-06-12 21:21:10,866 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-06-12 21:21:10,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:21:10,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 66 conjunts are in the unsatisfiable core [2021-06-12 21:21:10,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:21:11,009 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 561 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:21:11,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469333378] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:21:11,009 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:21:11,010 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34] total 35 [2021-06-12 21:21:11,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140771109] [2021-06-12 21:21:11,010 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-12 21:21:11,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:21:11,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-12 21:21:11,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 21:21:11,011 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) [2021-06-12 21:21:11,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:21:11,113 INFO L93 Difference]: Finished difference Result 2158 states and 4205 transitions. [2021-06-12 21:21:11,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 21:21:11,113 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 [2021-06-12 21:21:11,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:21:11,115 INFO L225 Difference]: With dead ends: 2158 [2021-06-12 21:21:11,115 INFO L226 Difference]: Without dead ends: 2091 [2021-06-12 21:21:11,115 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 453.4ms TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 21:21:11,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2091 states. [2021-06-12 21:21:11,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2091 to 1893. [2021-06-12 21:21:11,130 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) [2021-06-12 21:21:11,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1893 states to 1893 states and 3875 transitions. [2021-06-12 21:21:11,132 INFO L78 Accepts]: Start accepts. Automaton has 1893 states and 3875 transitions. Word has length 74 [2021-06-12 21:21:11,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:21:11,132 INFO L482 AbstractCegarLoop]: Abstraction has 1893 states and 3875 transitions. [2021-06-12 21:21:11,132 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) [2021-06-12 21:21:11,132 INFO L276 IsEmpty]: Start isEmpty. Operand 1893 states and 3875 transitions. [2021-06-12 21:21:11,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-12 21:21:11,133 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:21:11,133 INFO L472 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:21:11,355 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:21:11,355 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:21:11,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:21:11,356 INFO L82 PathProgramCache]: Analyzing trace with hash -1805611966, now seen corresponding path program 60 times [2021-06-12 21:21:11,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:21:11,356 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307819080] [2021-06-12 21:21:11,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:21:11,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:21:13,362 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:21:13,363 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:21:13,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307819080] [2021-06-12 21:21:13,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307819080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:21:13,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182735216] [2021-06-12 21:21:13,363 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 [2021-06-12 21:21:13,424 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2021-06-12 21:21:13,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:21:13,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 135 conjunts are in the unsatisfiable core [2021-06-12 21:21:13,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:21:13,567 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 [2021-06-12 21:21:13,568 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:21:13,569 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:21:13,570 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:21:13,570 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-12 21:21:13,575 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:21:13,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182735216] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:21:13,575 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:21:13,575 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 68 [2021-06-12 21:21:13,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221445959] [2021-06-12 21:21:13,576 INFO L462 AbstractCegarLoop]: Interpolant automaton has 69 states [2021-06-12 21:21:13,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:21:13,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-06-12 21:21:13,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=4557, Unknown=0, NotChecked=0, Total=4692 [2021-06-12 21:21:13,576 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) [2021-06-12 21:21:20,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:21:20,406 INFO L93 Difference]: Finished difference Result 3847 states and 7617 transitions. [2021-06-12 21:21:20,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-12 21:21:20,406 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 [2021-06-12 21:21:20,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:21:20,409 INFO L225 Difference]: With dead ends: 3847 [2021-06-12 21:21:20,409 INFO L226 Difference]: Without dead ends: 2457 [2021-06-12 21:21:20,409 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 73 SyntacticMatches, 2 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2145 ImplicationChecksByTransitivity, 7228.2ms TimeCoverageRelationStatistics Valid=2511, Invalid=15579, Unknown=0, NotChecked=0, Total=18090 [2021-06-12 21:21:20,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2457 states. [2021-06-12 21:21:20,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2457 to 181. [2021-06-12 21:21:20,418 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) [2021-06-12 21:21:20,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 356 transitions. [2021-06-12 21:21:20,418 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 356 transitions. Word has length 75 [2021-06-12 21:21:20,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:21:20,418 INFO L482 AbstractCegarLoop]: Abstraction has 181 states and 356 transitions. [2021-06-12 21:21:20,418 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) [2021-06-12 21:21:20,418 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 356 transitions. [2021-06-12 21:21:20,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-06-12 21:21:20,419 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:21:20,419 INFO L472 BasicCegarLoop]: trace histogram [34, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:21:20,619 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-06-12 21:21:20,619 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:21:20,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:21:20,620 INFO L82 PathProgramCache]: Analyzing trace with hash -116325397, now seen corresponding path program 61 times [2021-06-12 21:21:20,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:21:20,620 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050519665] [2021-06-12 21:21:20,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:21:20,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:21:21,141 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 595 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:21:21,141 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:21:21,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050519665] [2021-06-12 21:21:21,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050519665] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:21:21,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104295564] [2021-06-12 21:21:21,141 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 [2021-06-12 21:21:21,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:21:21,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 68 conjunts are in the unsatisfiable core [2021-06-12 21:21:21,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:21:21,384 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 595 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:21:21,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104295564] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:21:21,385 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:21:21,385 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35] total 36 [2021-06-12 21:21:21,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018040681] [2021-06-12 21:21:21,385 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-12 21:21:21,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:21:21,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-12 21:21:21,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 21:21:21,386 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) [2021-06-12 21:21:21,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:21:21,485 INFO L93 Difference]: Finished difference Result 2274 states and 4434 transitions. [2021-06-12 21:21:21,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-12 21:21:21,485 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 [2021-06-12 21:21:21,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:21:21,487 INFO L225 Difference]: With dead ends: 2274 [2021-06-12 21:21:21,487 INFO L226 Difference]: Without dead ends: 2205 [2021-06-12 21:21:21,488 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 468.6ms TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 21:21:21,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2205 states. [2021-06-12 21:21:21,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2205 to 2001. [2021-06-12 21:21:21,507 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) [2021-06-12 21:21:21,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2001 states to 2001 states and 4094 transitions. [2021-06-12 21:21:21,509 INFO L78 Accepts]: Start accepts. Automaton has 2001 states and 4094 transitions. Word has length 76 [2021-06-12 21:21:21,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:21:21,509 INFO L482 AbstractCegarLoop]: Abstraction has 2001 states and 4094 transitions. [2021-06-12 21:21:21,509 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) [2021-06-12 21:21:21,509 INFO L276 IsEmpty]: Start isEmpty. Operand 2001 states and 4094 transitions. [2021-06-12 21:21:21,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-06-12 21:21:21,510 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:21:21,510 INFO L472 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:21:21,711 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:21:21,711 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:21:21,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:21:21,711 INFO L82 PathProgramCache]: Analyzing trace with hash -1242870538, now seen corresponding path program 62 times [2021-06-12 21:21:21,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:21:21,711 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460805574] [2021-06-12 21:21:21,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:21:21,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:21:23,852 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:21:23,852 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:21:23,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460805574] [2021-06-12 21:21:23,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460805574] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:21:23,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290914725] [2021-06-12 21:21:23,853 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 [2021-06-12 21:21:23,908 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:21:23,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:21:23,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 139 conjunts are in the unsatisfiable core [2021-06-12 21:21:23,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:21:24,055 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 [2021-06-12 21:21:24,056 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:21:24,057 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:21:24,057 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:21:24,057 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-12 21:21:24,062 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:21:24,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290914725] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:21:24,062 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:21:24,063 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 70 [2021-06-12 21:21:24,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588961425] [2021-06-12 21:21:24,063 INFO L462 AbstractCegarLoop]: Interpolant automaton has 71 states [2021-06-12 21:21:24,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:21:24,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-06-12 21:21:24,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=4831, Unknown=0, NotChecked=0, Total=4970 [2021-06-12 21:21:24,063 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) [2021-06-12 21:21:31,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:21:31,341 INFO L93 Difference]: Finished difference Result 4065 states and 8051 transitions. [2021-06-12 21:21:31,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-06-12 21:21:31,341 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 [2021-06-12 21:21:31,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:21:31,343 INFO L225 Difference]: With dead ends: 4065 [2021-06-12 21:21:31,343 INFO L226 Difference]: Without dead ends: 2599 [2021-06-12 21:21:31,344 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 75 SyntacticMatches, 2 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2278 ImplicationChecksByTransitivity, 7740.3ms TimeCoverageRelationStatistics Valid=2655, Invalid=16527, Unknown=0, NotChecked=0, Total=19182 [2021-06-12 21:21:31,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2599 states. [2021-06-12 21:21:31,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2599 to 186. [2021-06-12 21:21:31,351 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) [2021-06-12 21:21:31,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 366 transitions. [2021-06-12 21:21:31,351 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 366 transitions. Word has length 77 [2021-06-12 21:21:31,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:21:31,352 INFO L482 AbstractCegarLoop]: Abstraction has 186 states and 366 transitions. [2021-06-12 21:21:31,352 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) [2021-06-12 21:21:31,352 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 366 transitions. [2021-06-12 21:21:31,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-06-12 21:21:31,352 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:21:31,352 INFO L472 BasicCegarLoop]: trace histogram [35, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:21:31,553 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-06-12 21:21:31,553 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:21:31,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:21:31,553 INFO L82 PathProgramCache]: Analyzing trace with hash 148789687, now seen corresponding path program 63 times [2021-06-12 21:21:31,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:21:31,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509174993] [2021-06-12 21:21:31,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:21:31,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:21:32,086 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 630 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:21:32,086 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:21:32,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509174993] [2021-06-12 21:21:32,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509174993] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:21:32,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673245578] [2021-06-12 21:21:32,086 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 [2021-06-12 21:21:32,153 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2021-06-12 21:21:32,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:21:32,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 70 conjunts are in the unsatisfiable core [2021-06-12 21:21:32,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:21:32,308 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 630 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:21:32,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1673245578] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:21:32,308 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:21:32,308 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36] total 37 [2021-06-12 21:21:32,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633885376] [2021-06-12 21:21:32,309 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-12 21:21:32,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:21:32,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-12 21:21:32,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 21:21:32,309 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) [2021-06-12 21:21:32,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:21:32,431 INFO L93 Difference]: Finished difference Result 2393 states and 4669 transitions. [2021-06-12 21:21:32,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-12 21:21:32,432 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 [2021-06-12 21:21:32,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:21:32,433 INFO L225 Difference]: With dead ends: 2393 [2021-06-12 21:21:32,433 INFO L226 Difference]: Without dead ends: 2322 [2021-06-12 21:21:32,433 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 488.1ms TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 21:21:32,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2322 states. [2021-06-12 21:21:32,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2322 to 2112. [2021-06-12 21:21:32,446 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) [2021-06-12 21:21:32,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2112 states to 2112 states and 4319 transitions. [2021-06-12 21:21:32,448 INFO L78 Accepts]: Start accepts. Automaton has 2112 states and 4319 transitions. Word has length 78 [2021-06-12 21:21:32,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:21:32,449 INFO L482 AbstractCegarLoop]: Abstraction has 2112 states and 4319 transitions. [2021-06-12 21:21:32,449 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) [2021-06-12 21:21:32,449 INFO L276 IsEmpty]: Start isEmpty. Operand 2112 states and 4319 transitions. [2021-06-12 21:21:32,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-06-12 21:21:32,450 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:21:32,450 INFO L472 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:21:32,650 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:21:32,651 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:21:32,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:21:32,651 INFO L82 PathProgramCache]: Analyzing trace with hash -129332222, now seen corresponding path program 64 times [2021-06-12 21:21:32,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:21:32,651 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609347875] [2021-06-12 21:21:32,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:21:32,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:21:34,916 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:21:34,916 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:21:34,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609347875] [2021-06-12 21:21:34,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609347875] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:21:34,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698260505] [2021-06-12 21:21:34,917 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 [2021-06-12 21:21:34,969 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:21:34,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:21:34,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 143 conjunts are in the unsatisfiable core [2021-06-12 21:21:34,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:21:35,110 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 [2021-06-12 21:21:35,111 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:21:35,112 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:21:35,112 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:21:35,113 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-12 21:21:35,117 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:21:35,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1698260505] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:21:35,118 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:21:35,118 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 72 [2021-06-12 21:21:35,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871978774] [2021-06-12 21:21:35,118 INFO L462 AbstractCegarLoop]: Interpolant automaton has 73 states [2021-06-12 21:21:35,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:21:35,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2021-06-12 21:21:35,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=5113, Unknown=0, NotChecked=0, Total=5256 [2021-06-12 21:21:35,119 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) [2021-06-12 21:21:42,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:21:42,953 INFO L93 Difference]: Finished difference Result 4289 states and 8497 transitions. [2021-06-12 21:21:42,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-12 21:21:42,954 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 [2021-06-12 21:21:42,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:21:42,956 INFO L225 Difference]: With dead ends: 4289 [2021-06-12 21:21:42,956 INFO L226 Difference]: Without dead ends: 2745 [2021-06-12 21:21:42,957 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 77 SyntacticMatches, 2 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2415 ImplicationChecksByTransitivity, 8303.3ms TimeCoverageRelationStatistics Valid=2803, Invalid=17503, Unknown=0, NotChecked=0, Total=20306 [2021-06-12 21:21:42,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2745 states. [2021-06-12 21:21:42,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2745 to 191. [2021-06-12 21:21:42,966 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) [2021-06-12 21:21:42,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 376 transitions. [2021-06-12 21:21:42,966 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 376 transitions. Word has length 79 [2021-06-12 21:21:42,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:21:42,967 INFO L482 AbstractCegarLoop]: Abstraction has 191 states and 376 transitions. [2021-06-12 21:21:42,967 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) [2021-06-12 21:21:42,967 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 376 transitions. [2021-06-12 21:21:42,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-12 21:21:42,967 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:21:42,967 INFO L472 BasicCegarLoop]: trace histogram [36, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:21:43,180 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-06-12 21:21:43,181 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:21:43,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:21:43,181 INFO L82 PathProgramCache]: Analyzing trace with hash 308739115, now seen corresponding path program 65 times [2021-06-12 21:21:43,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:21:43,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116411521] [2021-06-12 21:21:43,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:21:43,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:21:43,747 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 666 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:21:43,747 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:21:43,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116411521] [2021-06-12 21:21:43,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116411521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:21:43,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443161899] [2021-06-12 21:21:43,747 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 [2021-06-12 21:21:43,822 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2021-06-12 21:21:43,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:21:43,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 72 conjunts are in the unsatisfiable core [2021-06-12 21:21:43,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:21:44,019 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 666 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:21:44,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443161899] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:21:44,019 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:21:44,019 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37] total 38 [2021-06-12 21:21:44,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135777612] [2021-06-12 21:21:44,019 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 21:21:44,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:21:44,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 21:21:44,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 21:21:44,020 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) [2021-06-12 21:21:44,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:21:44,132 INFO L93 Difference]: Finished difference Result 2515 states and 4910 transitions. [2021-06-12 21:21:44,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-12 21:21:44,133 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 [2021-06-12 21:21:44,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:21:44,134 INFO L225 Difference]: With dead ends: 2515 [2021-06-12 21:21:44,134 INFO L226 Difference]: Without dead ends: 2442 [2021-06-12 21:21:44,135 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 522.6ms TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 21:21:44,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2442 states. [2021-06-12 21:21:44,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2442 to 2226. [2021-06-12 21:21:44,150 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) [2021-06-12 21:21:44,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2226 states to 2226 states and 4550 transitions. [2021-06-12 21:21:44,152 INFO L78 Accepts]: Start accepts. Automaton has 2226 states and 4550 transitions. Word has length 80 [2021-06-12 21:21:44,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:21:44,152 INFO L482 AbstractCegarLoop]: Abstraction has 2226 states and 4550 transitions. [2021-06-12 21:21:44,152 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) [2021-06-12 21:21:44,152 INFO L276 IsEmpty]: Start isEmpty. Operand 2226 states and 4550 transitions. [2021-06-12 21:21:44,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-06-12 21:21:44,154 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:21:44,154 INFO L472 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:21:44,354 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-06-12 21:21:44,355 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:21:44,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:21:44,355 INFO L82 PathProgramCache]: Analyzing trace with hash -678443082, now seen corresponding path program 66 times [2021-06-12 21:21:44,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:21:44,355 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072847763] [2021-06-12 21:21:44,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:21:44,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:21:46,716 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:21:46,717 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:21:46,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072847763] [2021-06-12 21:21:46,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072847763] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:21:46,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977886694] [2021-06-12 21:21:46,717 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 [2021-06-12 21:21:46,784 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-06-12 21:21:46,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:21:46,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 147 conjunts are in the unsatisfiable core [2021-06-12 21:21:46,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:21:46,936 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 [2021-06-12 21:21:46,937 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:21:46,938 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:21:46,938 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:21:46,938 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-12 21:21:46,943 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:21:46,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977886694] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:21:46,943 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:21:46,943 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 74 [2021-06-12 21:21:46,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777709417] [2021-06-12 21:21:46,944 INFO L462 AbstractCegarLoop]: Interpolant automaton has 75 states [2021-06-12 21:21:46,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:21:46,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-06-12 21:21:46,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=5403, Unknown=0, NotChecked=0, Total=5550 [2021-06-12 21:21:46,944 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) [2021-06-12 21:21:55,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:21:55,371 INFO L93 Difference]: Finished difference Result 4519 states and 8955 transitions. [2021-06-12 21:21:55,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-06-12 21:21:55,371 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 [2021-06-12 21:21:55,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:21:55,374 INFO L225 Difference]: With dead ends: 4519 [2021-06-12 21:21:55,374 INFO L226 Difference]: Without dead ends: 2895 [2021-06-12 21:21:55,374 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 79 SyntacticMatches, 2 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2556 ImplicationChecksByTransitivity, 8857.9ms TimeCoverageRelationStatistics Valid=2955, Invalid=18507, Unknown=0, NotChecked=0, Total=21462 [2021-06-12 21:21:55,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2895 states. [2021-06-12 21:21:55,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2895 to 196. [2021-06-12 21:21:55,404 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) [2021-06-12 21:21:55,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 386 transitions. [2021-06-12 21:21:55,404 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 386 transitions. Word has length 81 [2021-06-12 21:21:55,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:21:55,404 INFO L482 AbstractCegarLoop]: Abstraction has 196 states and 386 transitions. [2021-06-12 21:21:55,404 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) [2021-06-12 21:21:55,404 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 386 transitions. [2021-06-12 21:21:55,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-06-12 21:21:55,405 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:21:55,405 INFO L472 BasicCegarLoop]: trace histogram [37, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:21:55,627 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-06-12 21:21:55,627 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:21:55,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:21:55,628 INFO L82 PathProgramCache]: Analyzing trace with hash 466171639, now seen corresponding path program 67 times [2021-06-12 21:21:55,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:21:55,628 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620123650] [2021-06-12 21:21:55,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:21:55,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:21:56,227 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 703 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:21:56,227 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:21:56,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620123650] [2021-06-12 21:21:56,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620123650] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:21:56,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353281446] [2021-06-12 21:21:56,227 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 [2021-06-12 21:21:56,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:21:56,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 74 conjunts are in the unsatisfiable core [2021-06-12 21:21:56,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:21:56,463 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 703 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:21:56,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353281446] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:21:56,464 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:21:56,464 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38] total 39 [2021-06-12 21:21:56,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037731017] [2021-06-12 21:21:56,464 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-06-12 21:21:56,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:21:56,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-06-12 21:21:56,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2021-06-12 21:21:56,465 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) [2021-06-12 21:21:56,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:21:56,596 INFO L93 Difference]: Finished difference Result 2640 states and 5157 transitions. [2021-06-12 21:21:56,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-12 21:21:56,596 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 [2021-06-12 21:21:56,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:21:56,598 INFO L225 Difference]: With dead ends: 2640 [2021-06-12 21:21:56,598 INFO L226 Difference]: Without dead ends: 2565 [2021-06-12 21:21:56,598 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 555.3ms TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2021-06-12 21:21:56,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2565 states. [2021-06-12 21:21:56,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2565 to 2343. [2021-06-12 21:21:56,612 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) [2021-06-12 21:21:56,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2343 states to 2343 states and 4787 transitions. [2021-06-12 21:21:56,614 INFO L78 Accepts]: Start accepts. Automaton has 2343 states and 4787 transitions. Word has length 82 [2021-06-12 21:21:56,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:21:56,614 INFO L482 AbstractCegarLoop]: Abstraction has 2343 states and 4787 transitions. [2021-06-12 21:21:56,614 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) [2021-06-12 21:21:56,614 INFO L276 IsEmpty]: Start isEmpty. Operand 2343 states and 4787 transitions. [2021-06-12 21:21:56,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-06-12 21:21:56,616 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:21:56,616 INFO L472 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:21:56,816 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:21:56,816 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:21:56,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:21:56,817 INFO L82 PathProgramCache]: Analyzing trace with hash 971852738, now seen corresponding path program 68 times [2021-06-12 21:21:56,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:21:56,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687559739] [2021-06-12 21:21:56,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:21:56,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:21:59,357 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:21:59,358 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:21:59,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687559739] [2021-06-12 21:21:59,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687559739] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:21:59,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562591352] [2021-06-12 21:21:59,358 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 [2021-06-12 21:21:59,440 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:21:59,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:21:59,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 151 conjunts are in the unsatisfiable core [2021-06-12 21:21:59,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:21:59,610 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 [2021-06-12 21:21:59,611 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:21:59,612 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:21:59,613 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:21:59,613 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-12 21:21:59,618 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:21:59,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562591352] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:21:59,619 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:21:59,619 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 76 [2021-06-12 21:21:59,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888087945] [2021-06-12 21:21:59,619 INFO L462 AbstractCegarLoop]: Interpolant automaton has 77 states [2021-06-12 21:21:59,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:21:59,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2021-06-12 21:21:59,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=5701, Unknown=0, NotChecked=0, Total=5852 [2021-06-12 21:21:59,620 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) [2021-06-12 21:22:08,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:22:08,519 INFO L93 Difference]: Finished difference Result 4755 states and 9425 transitions. [2021-06-12 21:22:08,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-06-12 21:22:08,519 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 [2021-06-12 21:22:08,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:22:08,522 INFO L225 Difference]: With dead ends: 4755 [2021-06-12 21:22:08,522 INFO L226 Difference]: Without dead ends: 3049 [2021-06-12 21:22:08,523 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 81 SyntacticMatches, 2 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2701 ImplicationChecksByTransitivity, 9447.3ms TimeCoverageRelationStatistics Valid=3111, Invalid=19539, Unknown=0, NotChecked=0, Total=22650 [2021-06-12 21:22:08,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3049 states. [2021-06-12 21:22:08,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3049 to 201. [2021-06-12 21:22:08,530 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) [2021-06-12 21:22:08,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 396 transitions. [2021-06-12 21:22:08,530 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 396 transitions. Word has length 83 [2021-06-12 21:22:08,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:22:08,531 INFO L482 AbstractCegarLoop]: Abstraction has 201 states and 396 transitions. [2021-06-12 21:22:08,531 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) [2021-06-12 21:22:08,531 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 396 transitions. [2021-06-12 21:22:08,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-06-12 21:22:08,531 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:22:08,531 INFO L472 BasicCegarLoop]: trace histogram [38, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:22:08,754 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-06-12 21:22:08,754 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:22:08,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:22:08,755 INFO L82 PathProgramCache]: Analyzing trace with hash 85734507, now seen corresponding path program 69 times [2021-06-12 21:22:08,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:22:08,755 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006269454] [2021-06-12 21:22:08,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:22:08,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:22:09,387 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 741 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:22:09,387 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:22:09,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006269454] [2021-06-12 21:22:09,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006269454] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:22:09,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118691551] [2021-06-12 21:22:09,388 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 [2021-06-12 21:22:09,473 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2021-06-12 21:22:09,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:22:09,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 76 conjunts are in the unsatisfiable core [2021-06-12 21:22:09,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:22:09,655 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 741 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:22:09,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118691551] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:22:09,655 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:22:09,655 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39] total 40 [2021-06-12 21:22:09,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719526719] [2021-06-12 21:22:09,656 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-06-12 21:22:09,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:22:09,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-06-12 21:22:09,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 21:22:09,656 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) [2021-06-12 21:22:09,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:22:09,784 INFO L93 Difference]: Finished difference Result 2768 states and 5410 transitions. [2021-06-12 21:22:09,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-12 21:22:09,784 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 [2021-06-12 21:22:09,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:22:09,786 INFO L225 Difference]: With dead ends: 2768 [2021-06-12 21:22:09,786 INFO L226 Difference]: Without dead ends: 2691 [2021-06-12 21:22:09,786 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 588.8ms TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 21:22:09,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2691 states. [2021-06-12 21:22:09,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2691 to 2463. [2021-06-12 21:22:09,801 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) [2021-06-12 21:22:09,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2463 states to 2463 states and 5030 transitions. [2021-06-12 21:22:09,803 INFO L78 Accepts]: Start accepts. Automaton has 2463 states and 5030 transitions. Word has length 84 [2021-06-12 21:22:09,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:22:09,804 INFO L482 AbstractCegarLoop]: Abstraction has 2463 states and 5030 transitions. [2021-06-12 21:22:09,804 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) [2021-06-12 21:22:09,804 INFO L276 IsEmpty]: Start isEmpty. Operand 2463 states and 5030 transitions. [2021-06-12 21:22:09,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-06-12 21:22:09,805 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:22:09,805 INFO L472 BasicCegarLoop]: trace histogram [38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:22:10,009 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:22:10,009 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:22:10,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:22:10,009 INFO L82 PathProgramCache]: Analyzing trace with hash 713966198, now seen corresponding path program 70 times [2021-06-12 21:22:10,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:22:10,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104204760] [2021-06-12 21:22:10,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:22:10,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:22:12,647 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:22:12,647 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:22:12,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104204760] [2021-06-12 21:22:12,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104204760] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:22:12,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646357296] [2021-06-12 21:22:12,648 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 [2021-06-12 21:22:12,726 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:22:12,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:22:12,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 155 conjunts are in the unsatisfiable core [2021-06-12 21:22:12,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:22:12,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 21:22:12,878 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:22:12,879 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:22:12,879 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:22:12,879 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-12 21:22:12,884 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:22:12,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [646357296] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:22:12,884 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:22:12,884 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 78 [2021-06-12 21:22:12,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254231764] [2021-06-12 21:22:12,885 INFO L462 AbstractCegarLoop]: Interpolant automaton has 79 states [2021-06-12 21:22:12,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:22:12,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2021-06-12 21:22:12,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=6007, Unknown=0, NotChecked=0, Total=6162 [2021-06-12 21:22:12,885 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) [2021-06-12 21:22:18,650 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2021-06-12 21:22:22,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:22:22,438 INFO L93 Difference]: Finished difference Result 4997 states and 9907 transitions. [2021-06-12 21:22:22,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-06-12 21:22:22,439 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 [2021-06-12 21:22:22,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:22:22,441 INFO L225 Difference]: With dead ends: 4997 [2021-06-12 21:22:22,441 INFO L226 Difference]: Without dead ends: 3207 [2021-06-12 21:22:22,442 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 83 SyntacticMatches, 2 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2850 ImplicationChecksByTransitivity, 10093.6ms TimeCoverageRelationStatistics Valid=3271, Invalid=20599, Unknown=0, NotChecked=0, Total=23870 [2021-06-12 21:22:22,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3207 states. [2021-06-12 21:22:22,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3207 to 206. [2021-06-12 21:22:22,450 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) [2021-06-12 21:22:22,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 406 transitions. [2021-06-12 21:22:22,450 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 406 transitions. Word has length 85 [2021-06-12 21:22:22,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:22:22,450 INFO L482 AbstractCegarLoop]: Abstraction has 206 states and 406 transitions. [2021-06-12 21:22:22,450 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) [2021-06-12 21:22:22,450 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 406 transitions. [2021-06-12 21:22:22,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-06-12 21:22:22,451 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:22:22,451 INFO L472 BasicCegarLoop]: trace histogram [39, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:22:22,651 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2021-06-12 21:22:22,651 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:22:22,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:22:22,652 INFO L82 PathProgramCache]: Analyzing trace with hash 681186359, now seen corresponding path program 71 times [2021-06-12 21:22:22,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:22:22,652 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941852411] [2021-06-12 21:22:22,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:22:22,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:22:23,319 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 780 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:22:23,319 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:22:23,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941852411] [2021-06-12 21:22:23,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941852411] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:22:23,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872969964] [2021-06-12 21:22:23,319 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 [2021-06-12 21:22:23,401 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2021-06-12 21:22:23,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:22:23,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 78 conjunts are in the unsatisfiable core [2021-06-12 21:22:23,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:22:23,604 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 780 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:22:23,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872969964] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:22:23,604 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:22:23,604 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40] total 41 [2021-06-12 21:22:23,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719422417] [2021-06-12 21:22:23,604 INFO L462 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-06-12 21:22:23,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:22:23,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-06-12 21:22:23,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2021-06-12 21:22:23,605 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) [2021-06-12 21:22:23,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:22:23,774 INFO L93 Difference]: Finished difference Result 2899 states and 5669 transitions. [2021-06-12 21:22:23,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-12 21:22:23,775 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 [2021-06-12 21:22:23,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:22:23,776 INFO L225 Difference]: With dead ends: 2899 [2021-06-12 21:22:23,777 INFO L226 Difference]: Without dead ends: 2820 [2021-06-12 21:22:23,777 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 607.3ms TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2021-06-12 21:22:23,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2820 states. [2021-06-12 21:22:23,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2820 to 2586. [2021-06-12 21:22:23,792 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) [2021-06-12 21:22:23,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2586 states to 2586 states and 5279 transitions. [2021-06-12 21:22:23,794 INFO L78 Accepts]: Start accepts. Automaton has 2586 states and 5279 transitions. Word has length 86 [2021-06-12 21:22:23,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:22:23,794 INFO L482 AbstractCegarLoop]: Abstraction has 2586 states and 5279 transitions. [2021-06-12 21:22:23,794 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) [2021-06-12 21:22:23,794 INFO L276 IsEmpty]: Start isEmpty. Operand 2586 states and 5279 transitions. [2021-06-12 21:22:23,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-06-12 21:22:23,796 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:22:23,796 INFO L472 BasicCegarLoop]: trace histogram [39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:22:23,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:22:23,997 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:22:23,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:22:23,997 INFO L82 PathProgramCache]: Analyzing trace with hash -1178547326, now seen corresponding path program 72 times [2021-06-12 21:22:23,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:22:23,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836113025] [2021-06-12 21:22:23,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:22:24,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:22:26,744 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:22:26,744 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:22:26,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836113025] [2021-06-12 21:22:26,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836113025] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:22:26,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540496718] [2021-06-12 21:22:26,744 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 [2021-06-12 21:22:26,821 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2021-06-12 21:22:26,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:22:26,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 84 conjunts are in the unsatisfiable core [2021-06-12 21:22:26,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:22:34,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:22:34,867 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 [2021-06-12 21:22:34,868 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:22:34,872 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:22:34,873 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:22:34,873 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:19, output treesize:3 [2021-06-12 21:22:34,878 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 741 proven. 819 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:22:34,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540496718] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:22:34,878 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:22:34,878 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 158 [2021-06-12 21:22:34,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074764427] [2021-06-12 21:22:34,878 INFO L462 AbstractCegarLoop]: Interpolant automaton has 159 states [2021-06-12 21:22:34,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:22:34,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 159 interpolants. [2021-06-12 21:22:34,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3318, Invalid=21804, Unknown=0, NotChecked=0, Total=25122 [2021-06-12 21:22:34,880 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) [2021-06-12 21:22:39,043 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 101 [2021-06-12 21:22:39,312 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 105 [2021-06-12 21:22:39,588 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 109 [2021-06-12 21:22:39,871 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 113 [2021-06-12 21:22:40,240 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 117 [2021-06-12 21:22:40,552 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 121 [2021-06-12 21:22:40,862 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 125 [2021-06-12 21:22:41,182 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 129 [2021-06-12 21:22:41,502 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 128 [2021-06-12 21:22:41,837 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 137 [2021-06-12 21:22:42,192 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 141 [2021-06-12 21:22:42,550 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 145 [2021-06-12 21:22:42,916 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 149 [2021-06-12 21:22:43,282 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 148 [2021-06-12 21:22:43,658 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 152 [2021-06-12 21:22:44,056 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 156 [2021-06-12 21:22:44,450 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 160 [2021-06-12 21:22:44,746 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2021-06-12 21:22:45,325 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2021-06-12 21:22:45,764 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2021-06-12 21:22:45,970 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2021-06-12 21:22:46,383 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2021-06-12 21:22:47,434 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2021-06-12 21:26:49,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:26:49,534 INFO L93 Difference]: Finished difference Result 43429 states and 85946 transitions. [2021-06-12 21:26:49,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 940 states. [2021-06-12 21:26:49,535 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 [2021-06-12 21:26:49,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:26:49,575 INFO L225 Difference]: With dead ends: 43429 [2021-06-12 21:26:49,575 INFO L226 Difference]: Without dead ends: 35000 [2021-06-12 21:26:49,622 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 1064 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1055 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431709 ImplicationChecksByTransitivity, 245689.3ms TimeCoverageRelationStatistics Valid=188064, Invalid=928128, Unknown=0, NotChecked=0, Total=1116192 [2021-06-12 21:26:49,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35000 states. [2021-06-12 21:26:49,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35000 to 2630. [2021-06-12 21:26:49,840 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) [2021-06-12 21:26:49,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2630 states to 2630 states and 5369 transitions. [2021-06-12 21:26:49,843 INFO L78 Accepts]: Start accepts. Automaton has 2630 states and 5369 transitions. Word has length 87 [2021-06-12 21:26:49,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:26:49,843 INFO L482 AbstractCegarLoop]: Abstraction has 2630 states and 5369 transitions. [2021-06-12 21:26:49,843 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) [2021-06-12 21:26:49,843 INFO L276 IsEmpty]: Start isEmpty. Operand 2630 states and 5369 transitions. [2021-06-12 21:26:49,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-06-12 21:26:49,845 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:26:49,845 INFO L472 BasicCegarLoop]: trace histogram [40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:26:50,045 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:26:50,045 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:26:50,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:26:50,046 INFO L82 PathProgramCache]: Analyzing trace with hash 1645133110, now seen corresponding path program 73 times [2021-06-12 21:26:50,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:26:50,046 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141477477] [2021-06-12 21:26:50,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:26:50,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:26:53,003 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:26:53,003 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:26:53,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141477477] [2021-06-12 21:26:53,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141477477] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:26:53,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276003899] [2021-06-12 21:26:53,004 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 [2021-06-12 21:26:53,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:26:53,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 163 conjunts are in the unsatisfiable core [2021-06-12 21:26:53,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:26:53,261 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 [2021-06-12 21:26:53,262 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:26:53,263 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:26:53,264 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:26:53,264 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-12 21:26:53,270 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:26:53,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276003899] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:26:53,270 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:26:53,270 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 82 [2021-06-12 21:26:53,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67221489] [2021-06-12 21:26:53,270 INFO L462 AbstractCegarLoop]: Interpolant automaton has 83 states [2021-06-12 21:26:53,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:26:53,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2021-06-12 21:26:53,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=6643, Unknown=0, NotChecked=0, Total=6806 [2021-06-12 21:26:53,271 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) [2021-06-12 21:26:57,234 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2021-06-12 21:26:58,911 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2021-06-12 21:26:59,114 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2021-06-12 21:26:59,317 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-06-12 21:26:59,604 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2021-06-12 21:27:04,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:27:04,385 INFO L93 Difference]: Finished difference Result 5413 states and 10738 transitions. [2021-06-12 21:27:04,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-06-12 21:27:04,385 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 [2021-06-12 21:27:04,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:27:04,388 INFO L225 Difference]: With dead ends: 5413 [2021-06-12 21:27:04,388 INFO L226 Difference]: Without dead ends: 3533 [2021-06-12 21:27:04,389 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 87 SyntacticMatches, 2 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3160 ImplicationChecksByTransitivity, 11747.0ms TimeCoverageRelationStatistics Valid=3603, Invalid=22803, Unknown=0, NotChecked=0, Total=26406 [2021-06-12 21:27:04,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3533 states. [2021-06-12 21:27:04,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3533 to 216. [2021-06-12 21:27:04,398 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) [2021-06-12 21:27:04,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 426 transitions. [2021-06-12 21:27:04,398 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 426 transitions. Word has length 89 [2021-06-12 21:27:04,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:27:04,399 INFO L482 AbstractCegarLoop]: Abstraction has 216 states and 426 transitions. [2021-06-12 21:27:04,399 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) [2021-06-12 21:27:04,399 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 426 transitions. [2021-06-12 21:27:04,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-06-12 21:27:04,399 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:27:04,399 INFO L472 BasicCegarLoop]: trace histogram [41, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:27:04,604 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:27:04,605 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:27:04,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:27:04,605 INFO L82 PathProgramCache]: Analyzing trace with hash -517410441, now seen corresponding path program 74 times [2021-06-12 21:27:04,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:27:04,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108265912] [2021-06-12 21:27:04,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:27:04,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:27:05,369 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 861 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:27:05,369 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:27:05,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108265912] [2021-06-12 21:27:05,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108265912] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:27:05,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344279492] [2021-06-12 21:27:05,369 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 [2021-06-12 21:27:05,427 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:27:05,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:27:05,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 82 conjunts are in the unsatisfiable core [2021-06-12 21:27:05,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:27:05,627 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 861 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:27:05,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344279492] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:27:05,627 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:27:05,627 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42] total 43 [2021-06-12 21:27:05,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304642660] [2021-06-12 21:27:05,628 INFO L462 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-06-12 21:27:05,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:27:05,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-06-12 21:27:05,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2021-06-12 21:27:05,628 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) [2021-06-12 21:27:05,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:27:05,795 INFO L93 Difference]: Finished difference Result 3170 states and 6205 transitions. [2021-06-12 21:27:05,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-12 21:27:05,795 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 [2021-06-12 21:27:05,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:27:05,797 INFO L225 Difference]: With dead ends: 3170 [2021-06-12 21:27:05,797 INFO L226 Difference]: Without dead ends: 3087 [2021-06-12 21:27:05,798 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 716.0ms TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2021-06-12 21:27:05,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3087 states. [2021-06-12 21:27:05,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3087 to 2841. [2021-06-12 21:27:05,822 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) [2021-06-12 21:27:05,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2841 states to 2841 states and 5795 transitions. [2021-06-12 21:27:05,826 INFO L78 Accepts]: Start accepts. Automaton has 2841 states and 5795 transitions. Word has length 90 [2021-06-12 21:27:05,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:27:05,826 INFO L482 AbstractCegarLoop]: Abstraction has 2841 states and 5795 transitions. [2021-06-12 21:27:05,826 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) [2021-06-12 21:27:05,826 INFO L276 IsEmpty]: Start isEmpty. Operand 2841 states and 5795 transitions. [2021-06-12 21:27:05,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-06-12 21:27:05,829 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:27:05,829 INFO L472 BasicCegarLoop]: trace histogram [41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:27:06,048 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2021-06-12 21:27:06,049 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:27:06,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:27:06,049 INFO L82 PathProgramCache]: Analyzing trace with hash -2042819774, now seen corresponding path program 75 times [2021-06-12 21:27:06,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:27:06,049 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444790094] [2021-06-12 21:27:06,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:27:06,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:27:09,118 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:27:09,118 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:27:09,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444790094] [2021-06-12 21:27:09,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444790094] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:27:09,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314724252] [2021-06-12 21:27:09,118 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 [2021-06-12 21:27:09,194 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2021-06-12 21:27:09,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:27:09,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 167 conjunts are in the unsatisfiable core [2021-06-12 21:27:09,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:27:09,373 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 [2021-06-12 21:27:09,373 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:27:09,374 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:27:09,375 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:27:09,375 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-12 21:27:09,380 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:27:09,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314724252] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:27:09,380 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:27:09,380 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 84 [2021-06-12 21:27:09,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818437949] [2021-06-12 21:27:09,380 INFO L462 AbstractCegarLoop]: Interpolant automaton has 85 states [2021-06-12 21:27:09,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:27:09,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2021-06-12 21:27:09,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=6973, Unknown=0, NotChecked=0, Total=7140 [2021-06-12 21:27:09,381 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) [2021-06-12 21:27:15,091 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2021-06-12 21:27:15,298 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2021-06-12 21:27:15,509 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2021-06-12 21:27:15,713 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2021-06-12 21:27:15,942 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-06-12 21:27:20,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:27:20,956 INFO L93 Difference]: Finished difference Result 5759 states and 11425 transitions. [2021-06-12 21:27:20,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-06-12 21:27:20,956 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 [2021-06-12 21:27:20,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:27:20,960 INFO L225 Difference]: With dead ends: 5759 [2021-06-12 21:27:20,960 INFO L226 Difference]: Without dead ends: 3705 [2021-06-12 21:27:20,961 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 89 SyntacticMatches, 2 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3321 ImplicationChecksByTransitivity, 12195.1ms TimeCoverageRelationStatistics Valid=3775, Invalid=23947, Unknown=0, NotChecked=0, Total=27722 [2021-06-12 21:27:20,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3705 states. [2021-06-12 21:27:20,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3705 to 221. [2021-06-12 21:27:20,970 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) [2021-06-12 21:27:20,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 436 transitions. [2021-06-12 21:27:20,970 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 436 transitions. Word has length 91 [2021-06-12 21:27:20,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:27:20,970 INFO L482 AbstractCegarLoop]: Abstraction has 221 states and 436 transitions. [2021-06-12 21:27:20,970 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) [2021-06-12 21:27:20,970 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 436 transitions. [2021-06-12 21:27:20,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-06-12 21:27:20,970 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:27:20,971 INFO L472 BasicCegarLoop]: trace histogram [42, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:27:21,171 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:27:21,171 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:27:21,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:27:21,171 INFO L82 PathProgramCache]: Analyzing trace with hash 1120167147, now seen corresponding path program 76 times [2021-06-12 21:27:21,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:27:21,171 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885588753] [2021-06-12 21:27:21,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:27:21,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:27:21,913 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 903 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:27:21,913 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:27:21,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885588753] [2021-06-12 21:27:21,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885588753] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:27:21,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364253947] [2021-06-12 21:27:21,913 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 [2021-06-12 21:27:22,009 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:27:22,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:27:22,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 84 conjunts are in the unsatisfiable core [2021-06-12 21:27:22,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:27:22,191 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 903 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:27:22,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364253947] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:27:22,191 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:27:22,191 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 43] total 44 [2021-06-12 21:27:22,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758101261] [2021-06-12 21:27:22,192 INFO L462 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-06-12 21:27:22,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:27:22,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-06-12 21:27:22,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2021-06-12 21:27:22,192 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) [2021-06-12 21:27:22,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:27:22,374 INFO L93 Difference]: Finished difference Result 3310 states and 6482 transitions. [2021-06-12 21:27:22,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-12 21:27:22,374 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 [2021-06-12 21:27:22,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:27:22,378 INFO L225 Difference]: With dead ends: 3310 [2021-06-12 21:27:22,378 INFO L226 Difference]: Without dead ends: 3225 [2021-06-12 21:27:22,378 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 696.6ms TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2021-06-12 21:27:22,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3225 states. [2021-06-12 21:27:22,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3225 to 2973. [2021-06-12 21:27:22,407 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) [2021-06-12 21:27:22,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2973 states to 2973 states and 6062 transitions. [2021-06-12 21:27:22,410 INFO L78 Accepts]: Start accepts. Automaton has 2973 states and 6062 transitions. Word has length 92 [2021-06-12 21:27:22,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:27:22,411 INFO L482 AbstractCegarLoop]: Abstraction has 2973 states and 6062 transitions. [2021-06-12 21:27:22,411 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) [2021-06-12 21:27:22,411 INFO L276 IsEmpty]: Start isEmpty. Operand 2973 states and 6062 transitions. [2021-06-12 21:27:22,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-06-12 21:27:22,413 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:27:22,414 INFO L472 BasicCegarLoop]: trace histogram [42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:27:22,638 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:27:22,638 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:27:22,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:27:22,638 INFO L82 PathProgramCache]: Analyzing trace with hash -214353930, now seen corresponding path program 77 times [2021-06-12 21:27:22,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:27:22,638 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192643444] [2021-06-12 21:27:22,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:27:22,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:27:25,828 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:27:25,828 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:27:25,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192643444] [2021-06-12 21:27:25,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192643444] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:27:25,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904631114] [2021-06-12 21:27:25,828 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 [2021-06-12 21:27:25,924 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2021-06-12 21:27:25,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:27:25,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 171 conjunts are in the unsatisfiable core [2021-06-12 21:27:25,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:27:26,090 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 [2021-06-12 21:27:26,091 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:27:26,092 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:27:26,093 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:27:26,093 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-12 21:27:26,098 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:27:26,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904631114] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:27:26,098 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:27:26,098 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 86 [2021-06-12 21:27:26,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606124093] [2021-06-12 21:27:26,098 INFO L462 AbstractCegarLoop]: Interpolant automaton has 87 states [2021-06-12 21:27:26,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:27:26,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2021-06-12 21:27:26,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=7311, Unknown=0, NotChecked=0, Total=7482 [2021-06-12 21:27:26,099 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) [2021-06-12 21:27:31,891 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2021-06-12 21:27:32,104 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2021-06-12 21:27:32,322 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2021-06-12 21:27:32,542 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2021-06-12 21:27:32,756 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2021-06-12 21:27:32,993 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2021-06-12 21:27:33,157 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-06-12 21:27:38,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:27:38,267 INFO L93 Difference]: Finished difference Result 6025 states and 11955 transitions. [2021-06-12 21:27:38,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-06-12 21:27:38,267 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 [2021-06-12 21:27:38,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:27:38,270 INFO L225 Difference]: With dead ends: 6025 [2021-06-12 21:27:38,270 INFO L226 Difference]: Without dead ends: 3879 [2021-06-12 21:27:38,271 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 91 SyntacticMatches, 2 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3486 ImplicationChecksByTransitivity, 12758.7ms TimeCoverageRelationStatistics Valid=3951, Invalid=25119, Unknown=0, NotChecked=0, Total=29070 [2021-06-12 21:27:38,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3879 states. [2021-06-12 21:27:38,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3879 to 226. [2021-06-12 21:27:38,280 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) [2021-06-12 21:27:38,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 446 transitions. [2021-06-12 21:27:38,281 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 446 transitions. Word has length 93 [2021-06-12 21:27:38,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:27:38,281 INFO L482 AbstractCegarLoop]: Abstraction has 226 states and 446 transitions. [2021-06-12 21:27:38,281 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) [2021-06-12 21:27:38,281 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 446 transitions. [2021-06-12 21:27:38,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-06-12 21:27:38,281 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:27:38,281 INFO L472 BasicCegarLoop]: trace histogram [43, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:27:38,481 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-06-12 21:27:38,482 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:27:38,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:27:38,482 INFO L82 PathProgramCache]: Analyzing trace with hash 1968033463, now seen corresponding path program 78 times [2021-06-12 21:27:38,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:27:38,482 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237342407] [2021-06-12 21:27:38,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:27:38,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:27:39,275 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 946 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:27:39,275 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:27:39,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237342407] [2021-06-12 21:27:39,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237342407] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:27:39,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226556928] [2021-06-12 21:27:39,275 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 [2021-06-12 21:27:39,355 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2021-06-12 21:27:39,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:27:39,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 86 conjunts are in the unsatisfiable core [2021-06-12 21:27:39,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:27:39,547 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 946 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:27:39,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226556928] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:27:39,548 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:27:39,548 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44] total 45 [2021-06-12 21:27:39,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718798392] [2021-06-12 21:27:39,548 INFO L462 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-06-12 21:27:39,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:27:39,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-06-12 21:27:39,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2021-06-12 21:27:39,548 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) [2021-06-12 21:27:39,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:27:39,700 INFO L93 Difference]: Finished difference Result 3453 states and 6765 transitions. [2021-06-12 21:27:39,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-12 21:27:39,701 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 [2021-06-12 21:27:39,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:27:39,703 INFO L225 Difference]: With dead ends: 3453 [2021-06-12 21:27:39,703 INFO L226 Difference]: Without dead ends: 3366 [2021-06-12 21:27:39,704 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 747.4ms TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2021-06-12 21:27:39,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3366 states. [2021-06-12 21:27:39,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3366 to 3108. [2021-06-12 21:27:39,723 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) [2021-06-12 21:27:39,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3108 states to 3108 states and 6335 transitions. [2021-06-12 21:27:39,726 INFO L78 Accepts]: Start accepts. Automaton has 3108 states and 6335 transitions. Word has length 94 [2021-06-12 21:27:39,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:27:39,726 INFO L482 AbstractCegarLoop]: Abstraction has 3108 states and 6335 transitions. [2021-06-12 21:27:39,726 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) [2021-06-12 21:27:39,726 INFO L276 IsEmpty]: Start isEmpty. Operand 3108 states and 6335 transitions. [2021-06-12 21:27:39,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-06-12 21:27:39,728 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:27:39,728 INFO L472 BasicCegarLoop]: trace histogram [43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:27:39,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-06-12 21:27:39,929 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:27:39,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:27:39,929 INFO L82 PathProgramCache]: Analyzing trace with hash -606467326, now seen corresponding path program 79 times [2021-06-12 21:27:39,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:27:39,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177542863] [2021-06-12 21:27:39,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:27:39,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:27:43,321 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:27:43,321 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:27:43,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177542863] [2021-06-12 21:27:43,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177542863] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:27:43,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320947778] [2021-06-12 21:27:43,322 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 [2021-06-12 21:27:43,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:27:43,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 175 conjunts are in the unsatisfiable core [2021-06-12 21:27:43,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:27:43,548 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 [2021-06-12 21:27:43,549 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:27:43,550 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:27:43,550 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:27:43,550 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-12 21:27:43,555 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:27:43,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320947778] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:27:43,556 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:27:43,556 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88] total 88 [2021-06-12 21:27:43,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20562171] [2021-06-12 21:27:43,556 INFO L462 AbstractCegarLoop]: Interpolant automaton has 89 states [2021-06-12 21:27:43,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:27:43,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2021-06-12 21:27:43,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=7657, Unknown=0, NotChecked=0, Total=7832 [2021-06-12 21:27:43,556 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) [2021-06-12 21:27:49,445 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2021-06-12 21:27:49,663 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2021-06-12 21:27:49,885 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2021-06-12 21:27:50,111 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2021-06-12 21:27:50,340 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 176 [2021-06-12 21:27:50,563 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2021-06-12 21:27:50,812 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2021-06-12 21:27:50,982 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2021-06-12 21:27:51,160 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-06-12 21:27:56,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:27:56,404 INFO L93 Difference]: Finished difference Result 6297 states and 12497 transitions. [2021-06-12 21:27:56,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-06-12 21:27:56,404 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 [2021-06-12 21:27:56,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:27:56,408 INFO L225 Difference]: With dead ends: 6297 [2021-06-12 21:27:56,408 INFO L226 Difference]: Without dead ends: 4057 [2021-06-12 21:27:56,409 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 93 SyntacticMatches, 2 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3655 ImplicationChecksByTransitivity, 13502.3ms TimeCoverageRelationStatistics Valid=4131, Invalid=26319, Unknown=0, NotChecked=0, Total=30450 [2021-06-12 21:27:56,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4057 states. [2021-06-12 21:27:56,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4057 to 231. [2021-06-12 21:27:56,419 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) [2021-06-12 21:27:56,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 456 transitions. [2021-06-12 21:27:56,419 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 456 transitions. Word has length 95 [2021-06-12 21:27:56,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:27:56,419 INFO L482 AbstractCegarLoop]: Abstraction has 231 states and 456 transitions. [2021-06-12 21:27:56,419 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) [2021-06-12 21:27:56,419 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 456 transitions. [2021-06-12 21:27:56,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-06-12 21:27:56,420 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:27:56,420 INFO L472 BasicCegarLoop]: trace histogram [44, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:27:56,620 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:27:56,620 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:27:56,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:27:56,620 INFO L82 PathProgramCache]: Analyzing trace with hash -1597547221, now seen corresponding path program 80 times [2021-06-12 21:27:56,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:27:56,620 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457073895] [2021-06-12 21:27:56,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:27:56,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:27:57,446 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 990 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:27:57,447 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:27:57,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457073895] [2021-06-12 21:27:57,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457073895] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:27:57,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954044749] [2021-06-12 21:27:57,447 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 [2021-06-12 21:27:57,507 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:27:57,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:27:57,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 88 conjunts are in the unsatisfiable core [2021-06-12 21:27:57,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:27:57,694 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 990 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:27:57,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954044749] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:27:57,694 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:27:57,695 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 45] total 46 [2021-06-12 21:27:57,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922367942] [2021-06-12 21:27:57,695 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-06-12 21:27:57,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:27:57,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-06-12 21:27:57,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2021-06-12 21:27:57,696 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) [2021-06-12 21:27:57,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:27:57,867 INFO L93 Difference]: Finished difference Result 3599 states and 7054 transitions. [2021-06-12 21:27:57,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-12 21:27:57,867 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 [2021-06-12 21:27:57,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:27:57,870 INFO L225 Difference]: With dead ends: 3599 [2021-06-12 21:27:57,870 INFO L226 Difference]: Without dead ends: 3510 [2021-06-12 21:27:57,870 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 770.3ms TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2021-06-12 21:27:57,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3510 states. [2021-06-12 21:27:57,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3510 to 3246. [2021-06-12 21:27:57,890 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) [2021-06-12 21:27:57,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3246 states to 3246 states and 6614 transitions. [2021-06-12 21:27:57,893 INFO L78 Accepts]: Start accepts. Automaton has 3246 states and 6614 transitions. Word has length 96 [2021-06-12 21:27:57,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:27:57,893 INFO L482 AbstractCegarLoop]: Abstraction has 3246 states and 6614 transitions. [2021-06-12 21:27:57,893 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) [2021-06-12 21:27:57,893 INFO L276 IsEmpty]: Start isEmpty. Operand 3246 states and 6614 transitions. [2021-06-12 21:27:57,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-06-12 21:27:57,895 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:27:57,895 INFO L472 BasicCegarLoop]: trace histogram [44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:27:58,095 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:27:58,096 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:27:58,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:27:58,096 INFO L82 PathProgramCache]: Analyzing trace with hash -1791642954, now seen corresponding path program 81 times [2021-06-12 21:27:58,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:27:58,096 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080811618] [2021-06-12 21:27:58,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:27:58,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:28:01,584 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:28:01,584 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:28:01,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080811618] [2021-06-12 21:28:01,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080811618] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:28:01,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308650859] [2021-06-12 21:28:01,584 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-12 21:28:01,697 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2021-06-12 21:28:01,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:28:01,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 94 conjunts are in the unsatisfiable core [2021-06-12 21:28:01,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:28:11,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:28:11,964 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 [2021-06-12 21:28:11,965 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:28:11,972 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:28:11,973 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:28:11,973 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:19, output treesize:3 [2021-06-12 21:28:11,978 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 946 proven. 1034 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:28:11,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308650859] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:28:11,978 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:28:11,979 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90] total 178 [2021-06-12 21:28:11,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876542394] [2021-06-12 21:28:11,979 INFO L462 AbstractCegarLoop]: Interpolant automaton has 179 states [2021-06-12 21:28:11,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:28:11,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 179 interpolants. [2021-06-12 21:28:11,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4183, Invalid=27679, Unknown=0, NotChecked=0, Total=31862 [2021-06-12 21:28:11,981 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) [2021-06-12 21:28:16,410 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 105 [2021-06-12 21:28:16,680 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 109 [2021-06-12 21:28:16,951 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 113 [2021-06-12 21:28:17,232 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 112 [2021-06-12 21:28:17,522 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 121 [2021-06-12 21:28:17,820 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 120 [2021-06-12 21:28:18,124 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 129 [2021-06-12 21:28:18,441 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 128 [2021-06-12 21:28:18,777 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 137 [2021-06-12 21:28:19,118 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 141 [2021-06-12 21:28:19,460 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 145 [2021-06-12 21:28:19,815 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 144 [2021-06-12 21:28:20,173 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 148 [2021-06-12 21:28:20,559 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 157 [2021-06-12 21:28:20,940 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 156 [2021-06-12 21:28:21,334 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 160 [2021-06-12 21:28:21,747 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 172 DAG size of output: 164 [2021-06-12 21:28:22,173 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 173 [2021-06-12 21:28:22,607 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 177 [2021-06-12 21:28:23,038 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 184 DAG size of output: 176 [2021-06-12 21:28:23,480 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 180 [2021-06-12 21:28:23,803 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2021-06-12 21:28:24,132 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 179 [2021-06-12 21:28:24,444 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2021-06-12 21:28:24,693 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2021-06-12 21:28:24,982 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2021-06-12 21:28:25,234 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 180 [2021-06-12 21:28:25,474 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2021-06-12 21:28:25,736 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2021-06-12 21:28:25,996 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 176 [2021-06-12 21:28:26,233 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2021-06-12 21:28:26,498 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2021-06-12 21:28:26,752 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2021-06-12 21:28:27,008 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2021-06-12 21:28:27,246 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-06-12 21:28:27,509 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2021-06-12 21:28:27,756 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 174 [2021-06-12 21:28:28,020 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2021-06-12 21:28:28,522 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2021-06-12 21:28:28,777 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 174 [2021-06-12 21:28:29,019 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2021-06-12 21:28:29,262 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2021-06-12 21:28:29,763 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 174 [2021-06-12 21:28:30,011 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2021-06-12 21:28:30,249 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2021-06-12 21:28:30,486 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2021-06-12 21:28:31,009 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 174 [2021-06-12 21:28:31,268 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2021-06-12 21:28:31,515 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2021-06-12 21:28:31,746 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2021-06-12 21:28:32,481 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2021-06-12 21:28:32,737 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2021-06-12 21:28:32,980 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2021-06-12 21:28:33,965 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2021-06-12 21:28:34,230 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2021-06-12 21:28:34,479 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2021-06-12 21:28:35,652 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2021-06-12 21:28:35,911 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2021-06-12 21:28:37,347 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2021-06-12 21:28:37,617 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2021-06-12 21:28:39,260 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2021-06-12 21:28:41,166 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2021-06-12 21:28:45,983 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 150 [2021-06-12 21:29:01,176 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2021-06-12 21:29:53,345 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 114 Received shutdown request... [2021-06-12 21:31:02,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 691 states. [2021-06-12 21:31:02,908 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:31:02,908 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-12 21:31:02,910 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-12 21:31:02,911 WARN L196 ceAbstractionStarter]: Timeout [2021-06-12 21:31:02,912 INFO L202 PluginConnector]: Adding new model simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.06 09:31:02 BasicIcfg [2021-06-12 21:31:02,912 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-12 21:31:02,912 INFO L168 Benchmark]: Toolchain (without parser) took 763603.93 ms. Allocated memory was 190.8 MB in the beginning and 1.2 GB in the end (delta: 1.0 GB). Free memory was 171.7 MB in the beginning and 771.3 MB in the end (delta: -599.6 MB). Peak memory consumption was 1.0 GB. Max. memory is 8.0 GB. [2021-06-12 21:31:02,912 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 190.8 MB. Free memory is still 172.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-06-12 21:31:02,912 INFO L168 Benchmark]: Boogie Procedure Inliner took 27.16 ms. Allocated memory is still 190.8 MB. Free memory was 171.7 MB in the beginning and 170.2 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-06-12 21:31:02,912 INFO L168 Benchmark]: Boogie Preprocessor took 16.32 ms. Allocated memory is still 190.8 MB. Free memory was 170.2 MB in the beginning and 169.3 MB in the end (delta: 937.9 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-06-12 21:31:02,913 INFO L168 Benchmark]: RCFGBuilder took 275.13 ms. Allocated memory is still 190.8 MB. Free memory was 169.3 MB in the beginning and 157.3 MB in the end (delta: 11.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2021-06-12 21:31:02,913 INFO L168 Benchmark]: TraceAbstraction took 763279.37 ms. Allocated memory was 190.8 MB in the beginning and 1.2 GB in the end (delta: 1.0 GB). Free memory was 156.8 MB in the beginning and 771.3 MB in the end (delta: -614.6 MB). Peak memory consumption was 1.0 GB. Max. memory is 8.0 GB. [2021-06-12 21:31:02,913 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 190.8 MB. Free memory is still 172.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 27.16 ms. Allocated memory is still 190.8 MB. Free memory was 171.7 MB in the beginning and 170.2 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 16.32 ms. Allocated memory is still 190.8 MB. Free memory was 170.2 MB in the beginning and 169.3 MB in the end (delta: 937.9 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 275.13 ms. Allocated memory is still 190.8 MB. Free memory was 169.3 MB in the beginning and 157.3 MB in the end (delta: 11.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 763279.37 ms. Allocated memory was 190.8 MB in the beginning and 1.2 GB in the end (delta: 1.0 GB). Free memory was 156.8 MB in the beginning and 771.3 MB in the end (delta: -614.6 MB). Peak memory consumption was 1.0 GB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 46]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (3246states) and FLOYD_HOARE automaton (currently 691 states, 179 states before enhancement),while PredicateComparison was comparing new predicate (quantified with 0quantifier alternations) to 866 known predicates. - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 5 procedures, 20 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 763135.5ms, OverallIterations: 83, TraceHistogramMax: 44, EmptinessCheckTime: 80.7ms, AutomataDifference: 635885.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 41.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 9408 SDtfs, 129823 SDslu, 339525 SDs, 0 SdLazy, 95977 SolverSat, 41242 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 47616.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 12125 GetRequests, 4909 SyntacticMatches, 72 SemanticMatches, 7143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 817665 ImplicationChecksByTransitivity, 650461.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=3246occurred in iteration=82, InterpolantAutomatonStates: 4418, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 1126.1ms AutomataMinimizationTime, 82 MinimizatonAttempts, 99360 StatesRemovedByMinimization, 79 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 640.6ms SsaConstructionTime, 3016.4ms SatisfiabilityAnalysisTime, 103223.4ms InterpolantComputationTime, 8911 NumberOfCodeBlocks, 8911 NumberOfCodeBlocksAsserted, 659 NumberOfCheckSat, 8747 ConstructedInterpolants, 154 QuantifiedInterpolants, 56579 SizeOfPredicates, 51 NumberOfNonLiveVariables, 18527 ConjunctsInSsa, 5607 ConjunctsInUnsatCore, 164 InterpolantComputations, 2 PerfectInterpolantSequences, 29773/114327 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown