/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/mult-comm.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9bbddad6b14272d9691b7fb6f1c011d15ab18596-9bbddad [2021-06-12 19:20:28,542 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-12 19:20:28,543 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-12 19:20:28,568 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-12 19:20:28,616 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 19:20:28,649 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-12 19:20:28,649 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-12 19:20:28,649 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-12 19:20:28,649 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-12 19:20:28,650 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-12 19:20:28,650 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-12 19:20:28,650 INFO L138 SettingsManager]: * Use SBE=true [2021-06-12 19:20:28,651 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-12 19:20:28,651 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-12 19:20:28,651 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-12 19:20:28,651 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-12 19:20:28,651 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-12 19:20:28,651 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-12 19:20:28,651 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-12 19:20:28,651 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-12 19:20:28,651 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-12 19:20:28,651 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-12 19:20:28,651 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-12 19:20:28,652 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-12 19:20:28,652 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-12 19:20:28,652 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-12 19:20:28,652 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-12 19:20:28,652 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-12 19:20:28,652 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-12 19:20:28,652 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-12 19:20:28,652 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-12 19:20:28,652 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-12 19:20:28,652 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-12 19:20:28,653 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-12 19:20:28,653 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-12 19:20:28,653 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-12 19:20:28,653 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-12 19:20:28,872 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-12 19:20:28,886 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-12 19:20:28,887 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-12 19:20:28,888 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-12 19:20:28,889 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-12 19:20:28,890 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/mult-comm.wvr.bpl [2021-06-12 19:20:28,890 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/mult-comm.wvr.bpl' [2021-06-12 19:20:28,913 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-12 19:20:28,914 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-12 19:20:28,921 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-12 19:20:28,922 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-12 19:20:28,922 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-12 19:20:28,930 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "mult-comm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 07:20:28" (1/1) ... [2021-06-12 19:20:28,935 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "mult-comm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 07:20:28" (1/1) ... [2021-06-12 19:20:28,940 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-12 19:20:28,941 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-12 19:20:28,941 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-12 19:20:28,942 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-12 19:20:28,947 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "mult-comm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 07:20:28" (1/1) ... [2021-06-12 19:20:28,947 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "mult-comm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 07:20:28" (1/1) ... [2021-06-12 19:20:28,947 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "mult-comm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 07:20:28" (1/1) ... [2021-06-12 19:20:28,947 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "mult-comm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 07:20:28" (1/1) ... [2021-06-12 19:20:28,949 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "mult-comm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 07:20:28" (1/1) ... [2021-06-12 19:20:28,951 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "mult-comm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 07:20:28" (1/1) ... [2021-06-12 19:20:28,951 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "mult-comm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 07:20:28" (1/1) ... [2021-06-12 19:20:28,952 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-12 19:20:28,952 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-12 19:20:28,952 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-12 19:20:28,952 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-12 19:20:28,954 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "mult-comm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 07:20:28" (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 19:20:29,015 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-12 19:20:29,015 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-12 19:20:29,015 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-12 19:20:29,015 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-12 19:20:29,015 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-12 19:20:29,015 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-12 19:20:29,015 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-12 19:20:29,016 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-12 19:20:29,016 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-12 19:20:29,016 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 19:20:29,190 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-12 19:20:29,191 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-12 19:20:29,192 INFO L202 PluginConnector]: Adding new model mult-comm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.06 07:20:29 BoogieIcfgContainer [2021-06-12 19:20:29,192 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-12 19:20:29,193 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-12 19:20:29,194 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-12 19:20:29,195 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-12 19:20:29,195 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "mult-comm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 07:20:28" (1/2) ... [2021-06-12 19:20:29,196 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@797d0914 and model type mult-comm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.06 07:20:29, skipping insertion in model container [2021-06-12 19:20:29,196 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "mult-comm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.06 07:20:29" (2/2) ... [2021-06-12 19:20:29,197 INFO L111 eAbstractionObserver]: Analyzing ICFG mult-comm.wvr.bpl [2021-06-12 19:20:29,200 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-12 19:20:29,200 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-12 19:20:29,201 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-12 19:20:29,201 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-12 19:20:29,254 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-06-12 19:20:29,267 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-12 19:20:29,278 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-12 19:20:29,279 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-12 19:20:29,279 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-12 19:20:29,279 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-12 19:20:29,279 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-12 19:20:29,279 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-12 19:20:29,279 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-12 19:20:29,279 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-12 19:20:29,284 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 24 places, 19 transitions, 54 flow [2021-06-12 19:20:29,291 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 31 states, 29 states have (on average 1.896551724137931) internal successors, (55), 30 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 19:20:29,292 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 29 states have (on average 1.896551724137931) internal successors, (55), 30 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 19:20:29,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-06-12 19:20:29,296 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:29,296 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:29,297 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:29,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:29,300 INFO L82 PathProgramCache]: Analyzing trace with hash -538755822, now seen corresponding path program 1 times [2021-06-12 19:20:29,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:29,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598213247] [2021-06-12 19:20:29,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:29,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:29,413 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 19:20:29,414 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:29,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598213247] [2021-06-12 19:20:29,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598213247] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 19:20:29,415 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 19:20:29,415 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-12 19:20:29,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016406928] [2021-06-12 19:20:29,418 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-12 19:20:29,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:29,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-12 19:20:29,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-12 19:20:29,435 INFO L87 Difference]: Start difference. First operand has 31 states, 29 states have (on average 1.896551724137931) internal successors, (55), 30 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) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 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 19:20:29,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:29,460 INFO L93 Difference]: Finished difference Result 54 states and 102 transitions. [2021-06-12 19:20:29,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-12 19:20:29,461 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 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 19:20:29,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:29,468 INFO L225 Difference]: With dead ends: 54 [2021-06-12 19:20:29,468 INFO L226 Difference]: Without dead ends: 47 [2021-06-12 19:20:29,469 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-12 19:20:29,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-06-12 19:20:29,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 38. [2021-06-12 19:20:29,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.9189189189189189) internal successors, (71), 37 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 19:20:29,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 71 transitions. [2021-06-12 19:20:29,502 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 71 transitions. Word has length 11 [2021-06-12 19:20:29,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:29,503 INFO L482 AbstractCegarLoop]: Abstraction has 38 states and 71 transitions. [2021-06-12 19:20:29,504 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 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 19:20:29,504 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 71 transitions. [2021-06-12 19:20:29,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-12 19:20:29,505 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:29,505 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:29,506 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-12 19:20:29,506 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:29,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:29,510 INFO L82 PathProgramCache]: Analyzing trace with hash 1263691540, now seen corresponding path program 1 times [2021-06-12 19:20:29,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:29,510 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211183358] [2021-06-12 19:20:29,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:29,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:29,669 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:29,670 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:29,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211183358] [2021-06-12 19:20:29,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211183358] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:29,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658176683] [2021-06-12 19:20:29,670 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 19:20:29,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:29,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 19:20:29,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:29,892 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:29,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658176683] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:29,893 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:29,893 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-06-12 19:20:29,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325006954] [2021-06-12 19:20:29,894 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-12 19:20:29,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:29,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-12 19:20:29,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-12 19:20:29,895 INFO L87 Difference]: Start difference. First operand 38 states and 71 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 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 19:20:30,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:30,021 INFO L93 Difference]: Finished difference Result 65 states and 125 transitions. [2021-06-12 19:20:30,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 19:20:30,021 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 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 13 [2021-06-12 19:20:30,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:30,022 INFO L225 Difference]: With dead ends: 65 [2021-06-12 19:20:30,022 INFO L226 Difference]: Without dead ends: 47 [2021-06-12 19:20:30,023 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 140.4ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-12 19:20:30,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-06-12 19:20:30,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 36. [2021-06-12 19:20:30,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 35 states have internal predecessors, (68), 0 states have call successors, (0), 0 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 19:20:30,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 68 transitions. [2021-06-12 19:20:30,026 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 68 transitions. Word has length 13 [2021-06-12 19:20:30,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:30,027 INFO L482 AbstractCegarLoop]: Abstraction has 36 states and 68 transitions. [2021-06-12 19:20:30,027 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 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 19:20:30,027 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 68 transitions. [2021-06-12 19:20:30,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-12 19:20:30,027 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:30,027 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:30,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-06-12 19:20:30,228 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:30,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:30,228 INFO L82 PathProgramCache]: Analyzing trace with hash -1006944620, now seen corresponding path program 1 times [2021-06-12 19:20:30,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:30,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990436457] [2021-06-12 19:20:30,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:30,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:30,285 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:30,285 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:30,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990436457] [2021-06-12 19:20:30,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990436457] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:30,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649489652] [2021-06-12 19:20:30,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 19:20:30,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:30,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 19:20:30,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:30,377 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:30,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649489652] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:30,378 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:30,378 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-06-12 19:20:30,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319047364] [2021-06-12 19:20:30,379 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-12 19:20:30,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:30,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-12 19:20:30,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-12 19:20:30,384 INFO L87 Difference]: Start difference. First operand 36 states and 68 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 19:20:30,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:30,414 INFO L93 Difference]: Finished difference Result 52 states and 94 transitions. [2021-06-12 19:20:30,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-12 19:20:30,414 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 13 [2021-06-12 19:20:30,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:30,416 INFO L225 Difference]: With dead ends: 52 [2021-06-12 19:20:30,416 INFO L226 Difference]: Without dead ends: 39 [2021-06-12 19:20:30,416 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 43.2ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-12 19:20:30,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-06-12 19:20:30,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2021-06-12 19:20:30,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.9189189189189189) internal successors, (71), 37 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 19:20:30,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 71 transitions. [2021-06-12 19:20:30,427 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 71 transitions. Word has length 13 [2021-06-12 19:20:30,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:30,427 INFO L482 AbstractCegarLoop]: Abstraction has 38 states and 71 transitions. [2021-06-12 19:20:30,427 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 19:20:30,427 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 71 transitions. [2021-06-12 19:20:30,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-12 19:20:30,428 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:30,428 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:30,645 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:30,645 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:30,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:30,646 INFO L82 PathProgramCache]: Analyzing trace with hash 689628820, now seen corresponding path program 2 times [2021-06-12 19:20:30,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:30,646 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514713181] [2021-06-12 19:20:30,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:30,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:30,764 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:30,764 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:30,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514713181] [2021-06-12 19:20:30,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514713181] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:30,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028445695] [2021-06-12 19:20:30,765 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 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 19:20:30,791 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:20:30,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:20:30,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 19:20:30,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:30,872 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:30,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028445695] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:30,872 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:30,873 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-06-12 19:20:30,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932294862] [2021-06-12 19:20:30,873 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-12 19:20:30,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:30,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-12 19:20:30,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-12 19:20:30,874 INFO L87 Difference]: Start difference. First operand 38 states and 71 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 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 19:20:30,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:30,965 INFO L93 Difference]: Finished difference Result 64 states and 122 transitions. [2021-06-12 19:20:30,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 19:20:30,966 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 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 13 [2021-06-12 19:20:30,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:30,966 INFO L225 Difference]: With dead ends: 64 [2021-06-12 19:20:30,966 INFO L226 Difference]: Without dead ends: 53 [2021-06-12 19:20:30,967 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 131.1ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-12 19:20:30,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-06-12 19:20:30,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 47. [2021-06-12 19:20:30,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.934782608695652) internal successors, (89), 46 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 19:20:30,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 89 transitions. [2021-06-12 19:20:30,970 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 89 transitions. Word has length 13 [2021-06-12 19:20:30,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:30,970 INFO L482 AbstractCegarLoop]: Abstraction has 47 states and 89 transitions. [2021-06-12 19:20:30,970 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 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 19:20:30,970 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 89 transitions. [2021-06-12 19:20:30,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:20:30,970 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:30,971 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:31,184 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:31,185 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:31,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:31,185 INFO L82 PathProgramCache]: Analyzing trace with hash -1751181162, now seen corresponding path program 2 times [2021-06-12 19:20:31,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:31,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273108393] [2021-06-12 19:20:31,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:31,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:31,273 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:31,274 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:31,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273108393] [2021-06-12 19:20:31,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273108393] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:31,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419317864] [2021-06-12 19:20:31,274 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-12 19:20:31,311 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:20:31,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:20:31,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 19:20:31,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:31,411 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:31,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419317864] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:31,411 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:31,411 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-06-12 19:20:31,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763534013] [2021-06-12 19:20:31,411 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 19:20:31,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:31,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 19:20:31,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-06-12 19:20:31,415 INFO L87 Difference]: Start difference. First operand 47 states and 89 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 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 19:20:31,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:31,530 INFO L93 Difference]: Finished difference Result 73 states and 140 transitions. [2021-06-12 19:20:31,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-12 19:20:31,531 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 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 19:20:31,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:31,531 INFO L225 Difference]: With dead ends: 73 [2021-06-12 19:20:31,531 INFO L226 Difference]: Without dead ends: 60 [2021-06-12 19:20:31,531 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 155.8ms TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:20:31,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-06-12 19:20:31,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 49. [2021-06-12 19:20:31,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.9583333333333333) internal successors, (94), 48 states have internal predecessors, (94), 0 states have call successors, (0), 0 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 19:20:31,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 94 transitions. [2021-06-12 19:20:31,534 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 94 transitions. Word has length 15 [2021-06-12 19:20:31,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:31,534 INFO L482 AbstractCegarLoop]: Abstraction has 49 states and 94 transitions. [2021-06-12 19:20:31,534 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 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 19:20:31,534 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 94 transitions. [2021-06-12 19:20:31,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:20:31,535 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:31,535 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:31,751 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:31,752 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:31,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:31,752 INFO L82 PathProgramCache]: Analyzing trace with hash 273149974, now seen corresponding path program 1 times [2021-06-12 19:20:31,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:31,752 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745255617] [2021-06-12 19:20:31,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:31,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:31,851 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 19:20:31,851 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:31,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745255617] [2021-06-12 19:20:31,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745255617] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:31,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043874301] [2021-06-12 19:20:31,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 19:20:31,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:31,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-12 19:20:31,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:32,103 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 19:20:32,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043874301] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:32,104 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:32,104 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-12 19:20:32,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807413613] [2021-06-12 19:20:32,104 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:20:32,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:32,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:20:32,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:20:32,105 INFO L87 Difference]: Start difference. First operand 49 states and 94 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 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 19:20:32,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:32,253 INFO L93 Difference]: Finished difference Result 69 states and 126 transitions. [2021-06-12 19:20:32,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:20:32,254 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 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 15 [2021-06-12 19:20:32,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:32,255 INFO L225 Difference]: With dead ends: 69 [2021-06-12 19:20:32,255 INFO L226 Difference]: Without dead ends: 62 [2021-06-12 19:20:32,255 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 211.4ms TimeCoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:20:32,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-06-12 19:20:32,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 53. [2021-06-12 19:20:32,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.9230769230769231) internal successors, (100), 52 states have internal predecessors, (100), 0 states have call successors, (0), 0 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 19:20:32,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 100 transitions. [2021-06-12 19:20:32,268 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 100 transitions. Word has length 15 [2021-06-12 19:20:32,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:32,269 INFO L482 AbstractCegarLoop]: Abstraction has 53 states and 100 transitions. [2021-06-12 19:20:32,269 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 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 19:20:32,269 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 100 transitions. [2021-06-12 19:20:32,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:20:32,269 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:32,269 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:32,470 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-06-12 19:20:32,470 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:32,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:32,470 INFO L82 PathProgramCache]: Analyzing trace with hash -109570414, now seen corresponding path program 2 times [2021-06-12 19:20:32,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:32,470 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433787789] [2021-06-12 19:20:32,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:32,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:32,537 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 19:20:32,537 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:32,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433787789] [2021-06-12 19:20:32,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433787789] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:32,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174957350] [2021-06-12 19:20:32,538 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 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 19:20:32,561 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:20:32,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:20:32,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-12 19:20:32,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:32,734 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:32,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [174957350] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:32,734 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:32,734 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-12 19:20:32,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851813946] [2021-06-12 19:20:32,735 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:20:32,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:32,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:20:32,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:20:32,735 INFO L87 Difference]: Start difference. First operand 53 states and 100 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 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 19:20:32,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:32,876 INFO L93 Difference]: Finished difference Result 73 states and 134 transitions. [2021-06-12 19:20:32,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:20:32,876 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 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 15 [2021-06-12 19:20:32,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:32,877 INFO L225 Difference]: With dead ends: 73 [2021-06-12 19:20:32,877 INFO L226 Difference]: Without dead ends: 66 [2021-06-12 19:20:32,877 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 193.0ms TimeCoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:20:32,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-06-12 19:20:32,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 54. [2021-06-12 19:20:32,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.9433962264150944) internal successors, (103), 53 states have internal predecessors, (103), 0 states have call successors, (0), 0 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 19:20:32,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 103 transitions. [2021-06-12 19:20:32,879 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 103 transitions. Word has length 15 [2021-06-12 19:20:32,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:32,879 INFO L482 AbstractCegarLoop]: Abstraction has 54 states and 103 transitions. [2021-06-12 19:20:32,879 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 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 19:20:32,879 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 103 transitions. [2021-06-12 19:20:32,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:20:32,880 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:32,880 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:33,086 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:33,086 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:33,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:33,086 INFO L82 PathProgramCache]: Analyzing trace with hash 1969723414, now seen corresponding path program 3 times [2021-06-12 19:20:33,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:33,087 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82302027] [2021-06-12 19:20:33,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:33,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:33,164 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 19:20:33,164 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:33,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82302027] [2021-06-12 19:20:33,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82302027] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:33,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950452900] [2021-06-12 19:20:33,164 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 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 19:20:33,186 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 19:20:33,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:20:33,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-12 19:20:33,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:33,358 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 19:20:33,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950452900] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:33,360 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:33,360 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-12 19:20:33,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823106954] [2021-06-12 19:20:33,360 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:20:33,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:33,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:20:33,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:20:33,362 INFO L87 Difference]: Start difference. First operand 54 states and 103 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 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 19:20:33,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:33,532 INFO L93 Difference]: Finished difference Result 94 states and 172 transitions. [2021-06-12 19:20:33,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:20:33,533 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 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 15 [2021-06-12 19:20:33,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:33,533 INFO L225 Difference]: With dead ends: 94 [2021-06-12 19:20:33,533 INFO L226 Difference]: Without dead ends: 87 [2021-06-12 19:20:33,533 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 203.2ms TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:20:33,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-06-12 19:20:33,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 55. [2021-06-12 19:20:33,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.9814814814814814) internal successors, (107), 54 states have internal predecessors, (107), 0 states have call successors, (0), 0 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 19:20:33,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 107 transitions. [2021-06-12 19:20:33,536 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 107 transitions. Word has length 15 [2021-06-12 19:20:33,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:33,536 INFO L482 AbstractCegarLoop]: Abstraction has 55 states and 107 transitions. [2021-06-12 19:20:33,536 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 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 19:20:33,536 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 107 transitions. [2021-06-12 19:20:33,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:20:33,536 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:33,536 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:33,752 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:33,759 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:33,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:33,759 INFO L82 PathProgramCache]: Analyzing trace with hash 1985184210, now seen corresponding path program 4 times [2021-06-12 19:20:33,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:33,759 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611448248] [2021-06-12 19:20:33,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:33,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:33,833 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 19:20:33,833 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:33,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611448248] [2021-06-12 19:20:33,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611448248] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:33,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899661896] [2021-06-12 19:20:33,834 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 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 19:20:33,860 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:20:33,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:20:33,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-12 19:20:33,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:34,022 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 19:20:34,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899661896] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:34,023 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:34,023 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-12 19:20:34,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146384104] [2021-06-12 19:20:34,023 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:20:34,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:34,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:20:34,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:20:34,024 INFO L87 Difference]: Start difference. First operand 55 states and 107 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 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 19:20:34,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:34,158 INFO L93 Difference]: Finished difference Result 81 states and 154 transitions. [2021-06-12 19:20:34,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:20:34,159 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 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 15 [2021-06-12 19:20:34,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:34,159 INFO L225 Difference]: With dead ends: 81 [2021-06-12 19:20:34,159 INFO L226 Difference]: Without dead ends: 74 [2021-06-12 19:20:34,160 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 205.4ms TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:20:34,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-06-12 19:20:34,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 55. [2021-06-12 19:20:34,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.9814814814814814) internal successors, (107), 54 states have internal predecessors, (107), 0 states have call successors, (0), 0 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 19:20:34,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 107 transitions. [2021-06-12 19:20:34,162 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 107 transitions. Word has length 15 [2021-06-12 19:20:34,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:34,162 INFO L482 AbstractCegarLoop]: Abstraction has 55 states and 107 transitions. [2021-06-12 19:20:34,162 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 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 19:20:34,162 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 107 transitions. [2021-06-12 19:20:34,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:20:34,162 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:34,162 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:34,376 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-06-12 19:20:34,377 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:34,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:34,377 INFO L82 PathProgramCache]: Analyzing trace with hash 903122118, now seen corresponding path program 5 times [2021-06-12 19:20:34,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:34,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410608039] [2021-06-12 19:20:34,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:34,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:34,460 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 19:20:34,460 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:34,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410608039] [2021-06-12 19:20:34,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410608039] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:34,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534265443] [2021-06-12 19:20:34,461 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 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 19:20:34,482 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:20:34,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:20:34,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-12 19:20:34,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:34,620 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 19:20:34,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534265443] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:34,621 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:34,621 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-12 19:20:34,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076724546] [2021-06-12 19:20:34,621 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:20:34,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:34,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:20:34,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:20:34,622 INFO L87 Difference]: Start difference. First operand 55 states and 107 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 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 19:20:34,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:34,705 INFO L93 Difference]: Finished difference Result 72 states and 135 transitions. [2021-06-12 19:20:34,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:20:34,706 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have 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 19:20:34,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:34,706 INFO L225 Difference]: With dead ends: 72 [2021-06-12 19:20:34,706 INFO L226 Difference]: Without dead ends: 65 [2021-06-12 19:20:34,706 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 148.8ms TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:20:34,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-06-12 19:20:34,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 57. [2021-06-12 19:20:34,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 2.0) internal successors, (112), 56 states have internal predecessors, (112), 0 states have call successors, (0), 0 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 19:20:34,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 112 transitions. [2021-06-12 19:20:34,708 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 112 transitions. Word has length 15 [2021-06-12 19:20:34,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:34,708 INFO L482 AbstractCegarLoop]: Abstraction has 57 states and 112 transitions. [2021-06-12 19:20:34,708 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 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 19:20:34,708 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 112 transitions. [2021-06-12 19:20:34,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:20:34,709 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:34,709 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:34,919 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:34,920 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:34,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:34,920 INFO L82 PathProgramCache]: Analyzing trace with hash -1312551350, now seen corresponding path program 6 times [2021-06-12 19:20:34,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:34,920 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318288331] [2021-06-12 19:20:34,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:34,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:34,989 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 19:20:34,989 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:34,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318288331] [2021-06-12 19:20:34,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318288331] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:34,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35284889] [2021-06-12 19:20:34,990 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 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 19:20:35,011 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 19:20:35,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:20:35,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-12 19:20:35,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:35,129 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 19:20:35,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35284889] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:35,129 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:35,129 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-12 19:20:35,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964013285] [2021-06-12 19:20:35,129 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:20:35,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:35,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:20:35,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:20:35,130 INFO L87 Difference]: Start difference. First operand 57 states and 112 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 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 19:20:35,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:35,259 INFO L93 Difference]: Finished difference Result 95 states and 176 transitions. [2021-06-12 19:20:35,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:20:35,260 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have 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 19:20:35,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:35,260 INFO L225 Difference]: With dead ends: 95 [2021-06-12 19:20:35,260 INFO L226 Difference]: Without dead ends: 88 [2021-06-12 19:20:35,260 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 150.7ms TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:20:35,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-06-12 19:20:35,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 58. [2021-06-12 19:20:35,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 2.0350877192982457) internal successors, (116), 57 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 19:20:35,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 116 transitions. [2021-06-12 19:20:35,266 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 116 transitions. Word has length 15 [2021-06-12 19:20:35,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:35,266 INFO L482 AbstractCegarLoop]: Abstraction has 58 states and 116 transitions. [2021-06-12 19:20:35,266 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 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 19:20:35,267 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 116 transitions. [2021-06-12 19:20:35,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:20:35,267 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:35,267 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:35,473 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:35,473 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:35,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:35,473 INFO L82 PathProgramCache]: Analyzing trace with hash -1297090554, now seen corresponding path program 7 times [2021-06-12 19:20:35,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:35,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455733884] [2021-06-12 19:20:35,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:35,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:35,544 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 19:20:35,544 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:35,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455733884] [2021-06-12 19:20:35,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455733884] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:35,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493480471] [2021-06-12 19:20:35,544 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 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 19:20:35,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:35,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-12 19:20:35,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:35,667 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 19:20:35,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493480471] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:35,667 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:35,667 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-12 19:20:35,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907706464] [2021-06-12 19:20:35,667 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:20:35,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:35,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:20:35,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:20:35,668 INFO L87 Difference]: Start difference. First operand 58 states and 116 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 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 19:20:35,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:35,781 INFO L93 Difference]: Finished difference Result 82 states and 158 transitions. [2021-06-12 19:20:35,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:20:35,782 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have 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 19:20:35,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:35,785 INFO L225 Difference]: With dead ends: 82 [2021-06-12 19:20:35,785 INFO L226 Difference]: Without dead ends: 75 [2021-06-12 19:20:35,785 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 162.3ms TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:20:35,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-06-12 19:20:35,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 56. [2021-06-12 19:20:35,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.981818181818182) internal successors, (109), 55 states have internal predecessors, (109), 0 states have call successors, (0), 0 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 19:20:35,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 109 transitions. [2021-06-12 19:20:35,787 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 109 transitions. Word has length 15 [2021-06-12 19:20:35,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:35,787 INFO L482 AbstractCegarLoop]: Abstraction has 56 states and 109 transitions. [2021-06-12 19:20:35,787 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 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 19:20:35,787 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 109 transitions. [2021-06-12 19:20:35,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:20:35,788 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:35,788 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:36,001 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-06-12 19:20:36,001 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:36,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:36,001 INFO L82 PathProgramCache]: Analyzing trace with hash 833619410, now seen corresponding path program 8 times [2021-06-12 19:20:36,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:36,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616285868] [2021-06-12 19:20:36,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:36,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:36,065 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:36,065 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:36,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616285868] [2021-06-12 19:20:36,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616285868] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:36,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686142751] [2021-06-12 19:20:36,065 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 19:20:36,087 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:20:36,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:20:36,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-12 19:20:36,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:36,199 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 19:20:36,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1686142751] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:36,200 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:36,200 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-12 19:20:36,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684339625] [2021-06-12 19:20:36,200 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:20:36,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:36,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:20:36,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:20:36,201 INFO L87 Difference]: Start difference. First operand 56 states and 109 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 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 19:20:36,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:36,314 INFO L93 Difference]: Finished difference Result 92 states and 172 transitions. [2021-06-12 19:20:36,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:20:36,314 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have 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 19:20:36,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:36,315 INFO L225 Difference]: With dead ends: 92 [2021-06-12 19:20:36,315 INFO L226 Difference]: Without dead ends: 85 [2021-06-12 19:20:36,315 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 166.8ms TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:20:36,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-06-12 19:20:36,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 58. [2021-06-12 19:20:36,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 2.0350877192982457) internal successors, (116), 57 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 19:20:36,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 116 transitions. [2021-06-12 19:20:36,317 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 116 transitions. Word has length 15 [2021-06-12 19:20:36,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:36,317 INFO L482 AbstractCegarLoop]: Abstraction has 58 states and 116 transitions. [2021-06-12 19:20:36,317 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 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 19:20:36,317 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 116 transitions. [2021-06-12 19:20:36,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:20:36,317 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:36,317 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:36,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-06-12 19:20:36,529 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:36,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:36,529 INFO L82 PathProgramCache]: Analyzing trace with hash 849080206, now seen corresponding path program 9 times [2021-06-12 19:20:36,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:36,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487183606] [2021-06-12 19:20:36,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:36,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:36,586 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 19:20:36,586 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:36,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487183606] [2021-06-12 19:20:36,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487183606] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:36,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004259452] [2021-06-12 19:20:36,586 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-12 19:20:36,609 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:20:36,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:20:36,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-12 19:20:36,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:36,708 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 19:20:36,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004259452] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:36,708 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:36,709 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-12 19:20:36,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276653135] [2021-06-12 19:20:36,709 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:20:36,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:36,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:20:36,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:20:36,709 INFO L87 Difference]: Start difference. First operand 58 states and 116 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 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 19:20:36,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:36,844 INFO L93 Difference]: Finished difference Result 98 states and 183 transitions. [2021-06-12 19:20:36,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:20:36,844 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have 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 19:20:36,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:36,845 INFO L225 Difference]: With dead ends: 98 [2021-06-12 19:20:36,845 INFO L226 Difference]: Without dead ends: 91 [2021-06-12 19:20:36,845 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 148.0ms TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:20:36,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-06-12 19:20:36,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 57. [2021-06-12 19:20:36,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 2.0) internal successors, (112), 56 states have internal predecessors, (112), 0 states have call successors, (0), 0 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 19:20:36,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 112 transitions. [2021-06-12 19:20:36,847 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 112 transitions. Word has length 15 [2021-06-12 19:20:36,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:36,848 INFO L482 AbstractCegarLoop]: Abstraction has 57 states and 112 transitions. [2021-06-12 19:20:36,848 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 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 19:20:36,848 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 112 transitions. [2021-06-12 19:20:36,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:20:36,848 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:36,848 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:37,057 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-06-12 19:20:37,057 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:37,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:37,057 INFO L82 PathProgramCache]: Analyzing trace with hash 1420535012, now seen corresponding path program 10 times [2021-06-12 19:20:37,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:37,058 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007665658] [2021-06-12 19:20:37,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:37,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:37,131 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 19:20:37,131 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:37,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007665658] [2021-06-12 19:20:37,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007665658] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:37,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731899417] [2021-06-12 19:20:37,131 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 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 19:20:37,160 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:20:37,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:20:37,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-12 19:20:37,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:37,277 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 19:20:37,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731899417] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:37,278 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:37,278 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-12 19:20:37,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267053489] [2021-06-12 19:20:37,278 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:20:37,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:37,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:20:37,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:20:37,279 INFO L87 Difference]: Start difference. First operand 57 states and 112 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 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 19:20:37,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:37,374 INFO L93 Difference]: Finished difference Result 75 states and 142 transitions. [2021-06-12 19:20:37,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:20:37,374 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have 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 19:20:37,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:37,374 INFO L225 Difference]: With dead ends: 75 [2021-06-12 19:20:37,374 INFO L226 Difference]: Without dead ends: 68 [2021-06-12 19:20:37,375 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 137.3ms TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:20:37,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-06-12 19:20:37,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 60. [2021-06-12 19:20:37,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.9830508474576272) internal successors, (117), 59 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:37,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 117 transitions. [2021-06-12 19:20:37,378 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 117 transitions. Word has length 15 [2021-06-12 19:20:37,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:37,378 INFO L482 AbstractCegarLoop]: Abstraction has 60 states and 117 transitions. [2021-06-12 19:20:37,378 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 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 19:20:37,379 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 117 transitions. [2021-06-12 19:20:37,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:20:37,379 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:37,379 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:37,592 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:37,593 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:37,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:37,593 INFO L82 PathProgramCache]: Analyzing trace with hash 1788920398, now seen corresponding path program 11 times [2021-06-12 19:20:37,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:37,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492140303] [2021-06-12 19:20:37,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:37,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:37,648 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 19:20:37,648 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:37,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492140303] [2021-06-12 19:20:37,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492140303] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:37,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101987590] [2021-06-12 19:20:37,649 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 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 19:20:37,696 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 19:20:37,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:20:37,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-12 19:20:37,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:37,793 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 19:20:37,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2101987590] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:37,793 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:37,793 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-12 19:20:37,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92643842] [2021-06-12 19:20:37,793 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:20:37,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:37,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:20:37,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:20:37,794 INFO L87 Difference]: Start difference. First operand 60 states and 117 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 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 19:20:37,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:37,885 INFO L93 Difference]: Finished difference Result 76 states and 143 transitions. [2021-06-12 19:20:37,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:20:37,886 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have 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 19:20:37,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:37,886 INFO L225 Difference]: With dead ends: 76 [2021-06-12 19:20:37,886 INFO L226 Difference]: Without dead ends: 69 [2021-06-12 19:20:37,886 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 134.0ms TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:20:37,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-06-12 19:20:37,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 62. [2021-06-12 19:20:37,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 2.0) internal successors, (122), 61 states have internal predecessors, (122), 0 states have call successors, (0), 0 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 19:20:37,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 122 transitions. [2021-06-12 19:20:37,895 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 122 transitions. Word has length 15 [2021-06-12 19:20:37,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:37,896 INFO L482 AbstractCegarLoop]: Abstraction has 62 states and 122 transitions. [2021-06-12 19:20:37,896 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 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 19:20:37,896 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 122 transitions. [2021-06-12 19:20:37,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:20:37,896 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:37,896 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:38,114 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-06-12 19:20:38,114 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:38,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:38,114 INFO L82 PathProgramCache]: Analyzing trace with hash -426753070, now seen corresponding path program 12 times [2021-06-12 19:20:38,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:38,115 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243940421] [2021-06-12 19:20:38,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:38,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:38,174 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 19:20:38,175 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:38,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243940421] [2021-06-12 19:20:38,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243940421] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:38,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030852548] [2021-06-12 19:20:38,175 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 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 19:20:38,216 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 19:20:38,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:20:38,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-12 19:20:38,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:38,311 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 19:20:38,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2030852548] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:38,311 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:38,311 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-12 19:20:38,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191402523] [2021-06-12 19:20:38,312 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:20:38,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:38,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:20:38,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:20:38,312 INFO L87 Difference]: Start difference. First operand 62 states and 122 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 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 19:20:38,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:38,453 INFO L93 Difference]: Finished difference Result 99 states and 184 transitions. [2021-06-12 19:20:38,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:20:38,453 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have 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 19:20:38,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:38,454 INFO L225 Difference]: With dead ends: 99 [2021-06-12 19:20:38,454 INFO L226 Difference]: Without dead ends: 92 [2021-06-12 19:20:38,454 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 155.7ms TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:20:38,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-06-12 19:20:38,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 63. [2021-06-12 19:20:38,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 2.032258064516129) internal successors, (126), 62 states have internal predecessors, (126), 0 states have call successors, (0), 0 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 19:20:38,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 126 transitions. [2021-06-12 19:20:38,457 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 126 transitions. Word has length 15 [2021-06-12 19:20:38,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:38,457 INFO L482 AbstractCegarLoop]: Abstraction has 63 states and 126 transitions. [2021-06-12 19:20:38,457 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 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 19:20:38,457 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 126 transitions. [2021-06-12 19:20:38,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:20:38,459 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:38,459 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:38,669 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-06-12 19:20:38,669 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:38,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:38,669 INFO L82 PathProgramCache]: Analyzing trace with hash -411292274, now seen corresponding path program 13 times [2021-06-12 19:20:38,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:38,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501518342] [2021-06-12 19:20:38,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:38,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:38,751 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 19:20:38,751 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:38,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501518342] [2021-06-12 19:20:38,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501518342] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:38,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353408466] [2021-06-12 19:20:38,752 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:38,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:38,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-12 19:20:38,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:38,892 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 19:20:38,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353408466] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:38,892 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:38,892 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-12 19:20:38,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085293807] [2021-06-12 19:20:38,893 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:20:38,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:38,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:20:38,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:20:38,894 INFO L87 Difference]: Start difference. First operand 63 states and 126 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 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 19:20:39,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:39,014 INFO L93 Difference]: Finished difference Result 86 states and 166 transitions. [2021-06-12 19:20:39,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:20:39,014 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have 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 19:20:39,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:39,015 INFO L225 Difference]: With dead ends: 86 [2021-06-12 19:20:39,015 INFO L226 Difference]: Without dead ends: 79 [2021-06-12 19:20:39,015 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 167.6ms TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:20:39,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-06-12 19:20:39,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 61. [2021-06-12 19:20:39,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.9833333333333334) internal successors, (119), 60 states have internal predecessors, (119), 0 states have call successors, (0), 0 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 19:20:39,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 119 transitions. [2021-06-12 19:20:39,016 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 119 transitions. Word has length 15 [2021-06-12 19:20:39,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:39,016 INFO L482 AbstractCegarLoop]: Abstraction has 61 states and 119 transitions. [2021-06-12 19:20:39,017 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 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 19:20:39,017 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 119 transitions. [2021-06-12 19:20:39,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:20:39,017 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:39,017 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:39,217 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-06-12 19:20:39,217 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:39,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:39,218 INFO L82 PathProgramCache]: Analyzing trace with hash 1719417690, now seen corresponding path program 14 times [2021-06-12 19:20:39,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:39,218 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852104330] [2021-06-12 19:20:39,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:39,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:39,283 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 19:20:39,283 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:39,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852104330] [2021-06-12 19:20:39,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852104330] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:39,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880321486] [2021-06-12 19:20:39,284 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:39,303 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:20:39,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:20:39,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-12 19:20:39,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:39,431 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 19:20:39,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1880321486] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:39,431 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:39,431 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-12 19:20:39,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759871327] [2021-06-12 19:20:39,431 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:20:39,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:39,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:20:39,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:20:39,432 INFO L87 Difference]: Start difference. First operand 61 states and 119 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 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 19:20:39,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:39,573 INFO L93 Difference]: Finished difference Result 96 states and 180 transitions. [2021-06-12 19:20:39,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:20:39,573 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have 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 19:20:39,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:39,574 INFO L225 Difference]: With dead ends: 96 [2021-06-12 19:20:39,574 INFO L226 Difference]: Without dead ends: 89 [2021-06-12 19:20:39,574 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 172.7ms TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:20:39,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-06-12 19:20:39,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 63. [2021-06-12 19:20:39,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 2.032258064516129) internal successors, (126), 62 states have internal predecessors, (126), 0 states have call successors, (0), 0 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 19:20:39,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 126 transitions. [2021-06-12 19:20:39,592 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 126 transitions. Word has length 15 [2021-06-12 19:20:39,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:39,592 INFO L482 AbstractCegarLoop]: Abstraction has 63 states and 126 transitions. [2021-06-12 19:20:39,592 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 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 19:20:39,592 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 126 transitions. [2021-06-12 19:20:39,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:20:39,592 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:39,592 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:39,792 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:39,793 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:39,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:39,793 INFO L82 PathProgramCache]: Analyzing trace with hash 1734878486, now seen corresponding path program 15 times [2021-06-12 19:20:39,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:39,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489085314] [2021-06-12 19:20:39,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:39,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:39,853 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 19:20:39,853 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:39,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489085314] [2021-06-12 19:20:39,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489085314] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:39,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922824635] [2021-06-12 19:20:39,854 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-12 19:20:39,887 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 19:20:39,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:20:39,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-12 19:20:39,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:39,992 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 19:20:39,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922824635] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:39,993 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:39,993 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-12 19:20:39,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105787555] [2021-06-12 19:20:39,993 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:20:39,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:39,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:20:39,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:20:39,994 INFO L87 Difference]: Start difference. First operand 63 states and 126 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 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 19:20:40,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:40,118 INFO L93 Difference]: Finished difference Result 102 states and 191 transitions. [2021-06-12 19:20:40,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:20:40,118 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have 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 19:20:40,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:40,119 INFO L225 Difference]: With dead ends: 102 [2021-06-12 19:20:40,119 INFO L226 Difference]: Without dead ends: 95 [2021-06-12 19:20:40,119 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 151.6ms TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:20:40,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-06-12 19:20:40,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 62. [2021-06-12 19:20:40,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 2.0) internal successors, (122), 61 states have internal predecessors, (122), 0 states have call successors, (0), 0 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 19:20:40,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 122 transitions. [2021-06-12 19:20:40,120 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 122 transitions. Word has length 15 [2021-06-12 19:20:40,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:40,121 INFO L482 AbstractCegarLoop]: Abstraction has 62 states and 122 transitions. [2021-06-12 19:20:40,121 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 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 19:20:40,121 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 122 transitions. [2021-06-12 19:20:40,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:20:40,121 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:40,121 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:40,337 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:40,337 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:40,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:40,338 INFO L82 PathProgramCache]: Analyzing trace with hash -1988634004, now seen corresponding path program 16 times [2021-06-12 19:20:40,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:40,338 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495036329] [2021-06-12 19:20:40,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:40,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:40,403 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 19:20:40,403 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:40,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495036329] [2021-06-12 19:20:40,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495036329] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:40,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947457127] [2021-06-12 19:20:40,403 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 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 19:20:40,423 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:20:40,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:20:40,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-12 19:20:40,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:40,557 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 19:20:40,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947457127] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:40,557 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:40,557 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-12 19:20:40,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975624644] [2021-06-12 19:20:40,558 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:20:40,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:40,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:20:40,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:20:40,558 INFO L87 Difference]: Start difference. First operand 62 states and 122 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 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 19:20:40,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:40,658 INFO L93 Difference]: Finished difference Result 79 states and 150 transitions. [2021-06-12 19:20:40,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:20:40,658 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have 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 19:20:40,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:40,659 INFO L225 Difference]: With dead ends: 79 [2021-06-12 19:20:40,659 INFO L226 Difference]: Without dead ends: 72 [2021-06-12 19:20:40,659 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 158.3ms TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:20:40,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-06-12 19:20:40,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 60. [2021-06-12 19:20:40,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.9830508474576272) internal successors, (117), 59 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:40,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 117 transitions. [2021-06-12 19:20:40,661 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 117 transitions. Word has length 15 [2021-06-12 19:20:40,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:40,661 INFO L482 AbstractCegarLoop]: Abstraction has 60 states and 117 transitions. [2021-06-12 19:20:40,661 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 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 19:20:40,661 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 117 transitions. [2021-06-12 19:20:40,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:20:40,661 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:40,661 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:40,876 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-06-12 19:20:40,877 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:40,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:40,877 INFO L82 PathProgramCache]: Analyzing trace with hash 625326102, now seen corresponding path program 17 times [2021-06-12 19:20:40,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:40,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863900251] [2021-06-12 19:20:40,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:40,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:40,939 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 19:20:40,939 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:40,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863900251] [2021-06-12 19:20:40,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863900251] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:40,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822474779] [2021-06-12 19:20:40,939 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 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 19:20:40,960 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 19:20:40,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:20:40,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-12 19:20:40,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:41,082 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 19:20:41,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822474779] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:41,083 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:41,083 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-12 19:20:41,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512778923] [2021-06-12 19:20:41,083 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:20:41,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:41,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:20:41,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:20:41,084 INFO L87 Difference]: Start difference. First operand 60 states and 117 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 19:20:41,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:41,247 INFO L93 Difference]: Finished difference Result 99 states and 185 transitions. [2021-06-12 19:20:41,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:20:41,247 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 19:20:41,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:41,248 INFO L225 Difference]: With dead ends: 99 [2021-06-12 19:20:41,248 INFO L226 Difference]: Without dead ends: 92 [2021-06-12 19:20:41,248 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 164.8ms TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:20:41,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-06-12 19:20:41,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 62. [2021-06-12 19:20:41,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 2.0327868852459017) internal successors, (124), 61 states have internal predecessors, (124), 0 states have call successors, (0), 0 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 19:20:41,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 124 transitions. [2021-06-12 19:20:41,250 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 124 transitions. Word has length 15 [2021-06-12 19:20:41,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:41,250 INFO L482 AbstractCegarLoop]: Abstraction has 62 states and 124 transitions. [2021-06-12 19:20:41,250 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 19:20:41,250 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 124 transitions. [2021-06-12 19:20:41,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:20:41,250 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:41,250 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:41,456 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-06-12 19:20:41,457 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:41,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:41,457 INFO L82 PathProgramCache]: Analyzing trace with hash 640786898, now seen corresponding path program 18 times [2021-06-12 19:20:41,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:41,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813916928] [2021-06-12 19:20:41,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:41,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:41,529 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 19:20:41,530 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:41,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813916928] [2021-06-12 19:20:41,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813916928] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:41,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170847785] [2021-06-12 19:20:41,530 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 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 19:20:41,550 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 19:20:41,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:20:41,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-12 19:20:41,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:41,690 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 19:20:41,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170847785] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:41,690 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:41,690 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-12 19:20:41,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670484532] [2021-06-12 19:20:41,691 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:20:41,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:41,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:20:41,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:20:41,692 INFO L87 Difference]: Start difference. First operand 62 states and 124 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 19:20:41,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:41,814 INFO L93 Difference]: Finished difference Result 105 states and 196 transitions. [2021-06-12 19:20:41,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:20:41,815 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 19:20:41,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:41,815 INFO L225 Difference]: With dead ends: 105 [2021-06-12 19:20:41,815 INFO L226 Difference]: Without dead ends: 98 [2021-06-12 19:20:41,816 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 170.5ms TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:20:41,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-06-12 19:20:41,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 61. [2021-06-12 19:20:41,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 2.0) internal successors, (120), 60 states have internal predecessors, (120), 0 states have call successors, (0), 0 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 19:20:41,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 120 transitions. [2021-06-12 19:20:41,817 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 120 transitions. Word has length 15 [2021-06-12 19:20:41,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:41,817 INFO L482 AbstractCegarLoop]: Abstraction has 61 states and 120 transitions. [2021-06-12 19:20:41,817 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 19:20:41,817 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 120 transitions. [2021-06-12 19:20:41,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:20:41,818 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:41,818 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:42,033 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:42,033 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:42,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:42,034 INFO L82 PathProgramCache]: Analyzing trace with hash 1212241704, now seen corresponding path program 19 times [2021-06-12 19:20:42,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:42,034 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140172472] [2021-06-12 19:20:42,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:42,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:42,086 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 19:20:42,087 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:42,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140172472] [2021-06-12 19:20:42,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140172472] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:42,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990660009] [2021-06-12 19:20:42,087 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 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 19:20:42,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:42,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-12 19:20:42,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:42,213 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:42,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990660009] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:42,213 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:42,213 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-12 19:20:42,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556654225] [2021-06-12 19:20:42,214 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:20:42,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:42,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:20:42,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:20:42,214 INFO L87 Difference]: Start difference. First operand 61 states and 120 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 19:20:42,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:42,340 INFO L93 Difference]: Finished difference Result 85 states and 160 transitions. [2021-06-12 19:20:42,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:20:42,340 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 19:20:42,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:42,341 INFO L225 Difference]: With dead ends: 85 [2021-06-12 19:20:42,341 INFO L226 Difference]: Without dead ends: 78 [2021-06-12 19:20:42,341 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 142.3ms TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:20:42,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-06-12 19:20:42,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 60. [2021-06-12 19:20:42,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.9830508474576272) internal successors, (117), 59 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:42,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 117 transitions. [2021-06-12 19:20:42,343 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 117 transitions. Word has length 15 [2021-06-12 19:20:42,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:42,343 INFO L482 AbstractCegarLoop]: Abstraction has 60 states and 117 transitions. [2021-06-12 19:20:42,343 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 19:20:42,343 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 117 transitions. [2021-06-12 19:20:42,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:20:42,343 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:42,343 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:42,553 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-06-12 19:20:42,554 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:42,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:42,554 INFO L82 PathProgramCache]: Analyzing trace with hash 51263382, now seen corresponding path program 3 times [2021-06-12 19:20:42,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:42,554 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359487203] [2021-06-12 19:20:42,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:42,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:42,634 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:42,634 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:42,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359487203] [2021-06-12 19:20:42,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359487203] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:42,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155460881] [2021-06-12 19:20:42,634 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 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 19:20:42,668 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:20:42,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:20:42,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 19:20:42,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:42,717 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:42,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155460881] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:42,718 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:42,718 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-06-12 19:20:42,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297924621] [2021-06-12 19:20:42,718 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 19:20:42,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:42,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 19:20:42,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-06-12 19:20:42,719 INFO L87 Difference]: Start difference. First operand 60 states and 117 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 19:20:42,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:42,818 INFO L93 Difference]: Finished difference Result 92 states and 178 transitions. [2021-06-12 19:20:42,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-12 19:20:42,819 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 15 [2021-06-12 19:20:42,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:42,819 INFO L225 Difference]: With dead ends: 92 [2021-06-12 19:20:42,819 INFO L226 Difference]: Without dead ends: 81 [2021-06-12 19:20:42,819 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 151.3ms TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:20:42,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-06-12 19:20:42,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 64. [2021-06-12 19:20:42,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 2.015873015873016) internal successors, (127), 63 states have internal predecessors, (127), 0 states have call successors, (0), 0 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 19:20:42,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 127 transitions. [2021-06-12 19:20:42,821 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 127 transitions. Word has length 15 [2021-06-12 19:20:42,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:42,821 INFO L482 AbstractCegarLoop]: Abstraction has 64 states and 127 transitions. [2021-06-12 19:20:42,821 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 19:20:42,821 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 127 transitions. [2021-06-12 19:20:42,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:20:42,821 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:42,821 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:43,021 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:43,022 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:43,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:43,022 INFO L82 PathProgramCache]: Analyzing trace with hash 674386126, now seen corresponding path program 20 times [2021-06-12 19:20:43,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:43,022 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349089527] [2021-06-12 19:20:43,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:43,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:43,081 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:43,081 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:43,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349089527] [2021-06-12 19:20:43,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349089527] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:43,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058181556] [2021-06-12 19:20:43,081 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 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 19:20:43,111 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:20:43,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:20:43,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-12 19:20:43,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:43,229 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 19:20:43,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058181556] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:43,230 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:43,230 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-12 19:20:43,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650458166] [2021-06-12 19:20:43,230 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:20:43,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:43,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:20:43,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:20:43,230 INFO L87 Difference]: Start difference. First operand 64 states and 127 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 19:20:43,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:43,326 INFO L93 Difference]: Finished difference Result 86 states and 163 transitions. [2021-06-12 19:20:43,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:20:43,326 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 19:20:43,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:43,328 INFO L225 Difference]: With dead ends: 86 [2021-06-12 19:20:43,328 INFO L226 Difference]: Without dead ends: 79 [2021-06-12 19:20:43,329 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 153.6ms TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:20:43,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-06-12 19:20:43,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 69. [2021-06-12 19:20:43,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.9852941176470589) internal successors, (135), 68 states have internal predecessors, (135), 0 states have call successors, (0), 0 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 19:20:43,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 135 transitions. [2021-06-12 19:20:43,330 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 135 transitions. Word has length 15 [2021-06-12 19:20:43,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:43,330 INFO L482 AbstractCegarLoop]: Abstraction has 69 states and 135 transitions. [2021-06-12 19:20:43,330 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 19:20:43,330 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 135 transitions. [2021-06-12 19:20:43,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:20:43,331 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:43,331 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:43,540 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-06-12 19:20:43,541 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:43,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:43,541 INFO L82 PathProgramCache]: Analyzing trace with hash 59077016, now seen corresponding path program 3 times [2021-06-12 19:20:43,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:43,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581092382] [2021-06-12 19:20:43,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:43,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:43,633 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:43,633 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:43,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581092382] [2021-06-12 19:20:43,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581092382] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:43,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076278830] [2021-06-12 19:20:43,633 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-12 19:20:43,671 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 19:20:43,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:20:43,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 19:20:43,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:43,741 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:43,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076278830] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:43,742 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:43,742 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-06-12 19:20:43,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146789763] [2021-06-12 19:20:43,742 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:20:43,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:43,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:20:43,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:20:43,743 INFO L87 Difference]: Start difference. First operand 69 states and 135 transitions. Second operand has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:43,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:43,897 INFO L93 Difference]: Finished difference Result 97 states and 189 transitions. [2021-06-12 19:20:43,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-12 19:20:43,897 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:20:43,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:43,898 INFO L225 Difference]: With dead ends: 97 [2021-06-12 19:20:43,898 INFO L226 Difference]: Without dead ends: 84 [2021-06-12 19:20:43,898 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 192.0ms TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:20:43,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-06-12 19:20:43,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 71. [2021-06-12 19:20:43,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 2.0) internal successors, (140), 70 states have internal predecessors, (140), 0 states have call successors, (0), 0 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 19:20:43,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 140 transitions. [2021-06-12 19:20:43,899 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 140 transitions. Word has length 17 [2021-06-12 19:20:43,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:43,899 INFO L482 AbstractCegarLoop]: Abstraction has 71 states and 140 transitions. [2021-06-12 19:20:43,899 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:43,900 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 140 transitions. [2021-06-12 19:20:43,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:20:43,900 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:43,900 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:44,100 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-12 19:20:44,101 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:44,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:44,101 INFO L82 PathProgramCache]: Analyzing trace with hash 2083408152, now seen corresponding path program 21 times [2021-06-12 19:20:44,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:44,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094403328] [2021-06-12 19:20:44,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:44,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:44,181 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:44,181 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:44,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094403328] [2021-06-12 19:20:44,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094403328] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:44,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124997804] [2021-06-12 19:20:44,181 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 19:20:44,205 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:20:44,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:20:44,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:20:44,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:44,354 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:44,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2124997804] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:44,354 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:44,354 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-12 19:20:44,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380822656] [2021-06-12 19:20:44,355 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:20:44,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:44,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:20:44,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:20:44,355 INFO L87 Difference]: Start difference. First operand 71 states and 140 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 19:20:44,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:44,622 INFO L93 Difference]: Finished difference Result 99 states and 188 transitions. [2021-06-12 19:20:44,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:20:44,622 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17 [2021-06-12 19:20:44,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:44,623 INFO L225 Difference]: With dead ends: 99 [2021-06-12 19:20:44,623 INFO L226 Difference]: Without dead ends: 92 [2021-06-12 19:20:44,623 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 315.5ms TimeCoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:20:44,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-06-12 19:20:44,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 71. [2021-06-12 19:20:44,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 2.0) internal successors, (140), 70 states have internal predecessors, (140), 0 states have call successors, (0), 0 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 19:20:44,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 140 transitions. [2021-06-12 19:20:44,625 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 140 transitions. Word has length 17 [2021-06-12 19:20:44,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:44,625 INFO L482 AbstractCegarLoop]: Abstraction has 71 states and 140 transitions. [2021-06-12 19:20:44,625 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 19:20:44,625 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 140 transitions. [2021-06-12 19:20:44,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:20:44,625 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:44,625 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:44,836 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-06-12 19:20:44,837 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:44,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:44,838 INFO L82 PathProgramCache]: Analyzing trace with hash 1700687764, now seen corresponding path program 22 times [2021-06-12 19:20:44,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:44,838 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999712961] [2021-06-12 19:20:44,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:44,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:44,914 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:44,915 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:44,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999712961] [2021-06-12 19:20:44,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999712961] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:44,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561482585] [2021-06-12 19:20:44,915 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 19:20:44,944 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:20:44,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:20:44,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:20:44,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:45,103 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:45,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561482585] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:45,104 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:45,104 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-12 19:20:45,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969985437] [2021-06-12 19:20:45,104 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:20:45,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:45,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:20:45,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:20:45,105 INFO L87 Difference]: Start difference. First operand 71 states and 140 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 19:20:45,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:45,331 INFO L93 Difference]: Finished difference Result 104 states and 198 transitions. [2021-06-12 19:20:45,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:20:45,332 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17 [2021-06-12 19:20:45,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:45,332 INFO L225 Difference]: With dead ends: 104 [2021-06-12 19:20:45,332 INFO L226 Difference]: Without dead ends: 97 [2021-06-12 19:20:45,333 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 290.0ms TimeCoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:20:45,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-06-12 19:20:45,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 73. [2021-06-12 19:20:45,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 2.013888888888889) internal successors, (145), 72 states have internal predecessors, (145), 0 states have call successors, (0), 0 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 19:20:45,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 145 transitions. [2021-06-12 19:20:45,334 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 145 transitions. Word has length 17 [2021-06-12 19:20:45,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:45,334 INFO L482 AbstractCegarLoop]: Abstraction has 73 states and 145 transitions. [2021-06-12 19:20:45,334 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 19:20:45,334 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 145 transitions. [2021-06-12 19:20:45,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:20:45,334 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:45,335 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:45,549 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-12 19:20:45,549 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:45,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:45,549 INFO L82 PathProgramCache]: Analyzing trace with hash -514985704, now seen corresponding path program 23 times [2021-06-12 19:20:45,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:45,549 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772376118] [2021-06-12 19:20:45,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:45,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:45,644 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:45,645 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:45,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772376118] [2021-06-12 19:20:45,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772376118] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:45,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726123115] [2021-06-12 19:20:45,645 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 19:20:45,665 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 19:20:45,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:20:45,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:20:45,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:45,832 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:45,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [726123115] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:45,833 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:45,833 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-12 19:20:45,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755596158] [2021-06-12 19:20:45,833 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:20:45,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:45,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:20:45,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:20:45,834 INFO L87 Difference]: Start difference. First operand 73 states and 145 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 19:20:46,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:46,122 INFO L93 Difference]: Finished difference Result 130 states and 246 transitions. [2021-06-12 19:20:46,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:20:46,123 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17 [2021-06-12 19:20:46,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:46,123 INFO L225 Difference]: With dead ends: 130 [2021-06-12 19:20:46,123 INFO L226 Difference]: Without dead ends: 123 [2021-06-12 19:20:46,123 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 305.8ms TimeCoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:20:46,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-06-12 19:20:46,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 74. [2021-06-12 19:20:46,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 2.041095890410959) internal successors, (149), 73 states have internal predecessors, (149), 0 states have call successors, (0), 0 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 19:20:46,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 149 transitions. [2021-06-12 19:20:46,125 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 149 transitions. Word has length 17 [2021-06-12 19:20:46,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:46,125 INFO L482 AbstractCegarLoop]: Abstraction has 74 states and 149 transitions. [2021-06-12 19:20:46,125 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 19:20:46,125 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 149 transitions. [2021-06-12 19:20:46,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:20:46,126 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:46,126 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:46,326 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:46,326 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:46,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:46,326 INFO L82 PathProgramCache]: Analyzing trace with hash -499524908, now seen corresponding path program 24 times [2021-06-12 19:20:46,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:46,326 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476028552] [2021-06-12 19:20:46,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:46,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:46,406 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:46,406 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:46,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476028552] [2021-06-12 19:20:46,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476028552] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:46,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620961971] [2021-06-12 19:20:46,406 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 19:20:46,429 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 19:20:46,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:20:46,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:20:46,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:46,572 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:46,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620961971] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:46,573 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:46,573 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-12 19:20:46,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079704937] [2021-06-12 19:20:46,574 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:20:46,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:46,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:20:46,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:20:46,574 INFO L87 Difference]: Start difference. First operand 74 states and 149 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 19:20:46,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:46,848 INFO L93 Difference]: Finished difference Result 113 states and 220 transitions. [2021-06-12 19:20:46,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:20:46,848 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17 [2021-06-12 19:20:46,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:46,849 INFO L225 Difference]: With dead ends: 113 [2021-06-12 19:20:46,849 INFO L226 Difference]: Without dead ends: 106 [2021-06-12 19:20:46,849 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 290.1ms TimeCoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:20:46,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-06-12 19:20:46,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 72. [2021-06-12 19:20:46,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 2.0) internal successors, (142), 71 states have internal predecessors, (142), 0 states have call successors, (0), 0 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 19:20:46,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 142 transitions. [2021-06-12 19:20:46,850 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 142 transitions. Word has length 17 [2021-06-12 19:20:46,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:46,851 INFO L482 AbstractCegarLoop]: Abstraction has 72 states and 142 transitions. [2021-06-12 19:20:46,851 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 19:20:46,851 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 142 transitions. [2021-06-12 19:20:46,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:20:46,851 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:46,851 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:47,051 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:47,051 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:47,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:47,052 INFO L82 PathProgramCache]: Analyzing trace with hash -1651089708, now seen corresponding path program 25 times [2021-06-12 19:20:47,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:47,052 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445022316] [2021-06-12 19:20:47,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:47,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:47,138 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:47,138 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:47,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445022316] [2021-06-12 19:20:47,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445022316] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:47,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074439478] [2021-06-12 19:20:47,138 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 19:20:47,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:47,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:20:47,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:47,348 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:47,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074439478] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:47,348 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:47,348 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-12 19:20:47,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334134041] [2021-06-12 19:20:47,348 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:20:47,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:47,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:20:47,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:20:47,349 INFO L87 Difference]: Start difference. First operand 72 states and 142 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 19:20:47,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:47,600 INFO L93 Difference]: Finished difference Result 124 states and 236 transitions. [2021-06-12 19:20:47,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:20:47,600 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17 [2021-06-12 19:20:47,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:47,601 INFO L225 Difference]: With dead ends: 124 [2021-06-12 19:20:47,601 INFO L226 Difference]: Without dead ends: 117 [2021-06-12 19:20:47,601 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 287.9ms TimeCoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:20:47,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-06-12 19:20:47,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 74. [2021-06-12 19:20:47,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 2.041095890410959) internal successors, (149), 73 states have internal predecessors, (149), 0 states have call successors, (0), 0 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 19:20:47,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 149 transitions. [2021-06-12 19:20:47,603 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 149 transitions. Word has length 17 [2021-06-12 19:20:47,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:47,603 INFO L482 AbstractCegarLoop]: Abstraction has 74 states and 149 transitions. [2021-06-12 19:20:47,603 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 19:20:47,603 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 149 transitions. [2021-06-12 19:20:47,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:20:47,603 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:47,603 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:47,808 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:47,809 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:47,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:47,809 INFO L82 PathProgramCache]: Analyzing trace with hash -1635628912, now seen corresponding path program 26 times [2021-06-12 19:20:47,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:47,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139524633] [2021-06-12 19:20:47,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:47,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:47,884 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:47,884 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:47,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139524633] [2021-06-12 19:20:47,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139524633] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:47,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516807654] [2021-06-12 19:20:47,885 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 19:20:47,913 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:20:47,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:20:47,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:20:47,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:48,072 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:48,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516807654] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:48,072 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:48,072 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-12 19:20:48,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523215308] [2021-06-12 19:20:48,073 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:20:48,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:48,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:20:48,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:20:48,074 INFO L87 Difference]: Start difference. First operand 74 states and 149 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 19:20:48,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:48,332 INFO L93 Difference]: Finished difference Result 127 states and 241 transitions. [2021-06-12 19:20:48,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:20:48,333 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17 [2021-06-12 19:20:48,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:48,333 INFO L225 Difference]: With dead ends: 127 [2021-06-12 19:20:48,333 INFO L226 Difference]: Without dead ends: 120 [2021-06-12 19:20:48,333 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 299.5ms TimeCoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:20:48,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-06-12 19:20:48,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 73. [2021-06-12 19:20:48,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 2.013888888888889) internal successors, (145), 72 states have internal predecessors, (145), 0 states have call successors, (0), 0 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 19:20:48,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 145 transitions. [2021-06-12 19:20:48,335 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 145 transitions. Word has length 17 [2021-06-12 19:20:48,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:48,335 INFO L482 AbstractCegarLoop]: Abstraction has 73 states and 145 transitions. [2021-06-12 19:20:48,335 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 19:20:48,335 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 145 transitions. [2021-06-12 19:20:48,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:20:48,335 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:48,335 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:48,544 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-06-12 19:20:48,545 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:48,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:48,545 INFO L82 PathProgramCache]: Analyzing trace with hash -1064174106, now seen corresponding path program 27 times [2021-06-12 19:20:48,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:48,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832628690] [2021-06-12 19:20:48,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:48,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:48,618 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:48,618 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:48,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832628690] [2021-06-12 19:20:48,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832628690] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:48,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486314760] [2021-06-12 19:20:48,618 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) [2021-06-12 19:20:48,644 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 19:20:48,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:20:48,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:20:48,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:48,772 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:48,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486314760] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:48,772 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:48,772 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-12 19:20:48,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988504747] [2021-06-12 19:20:48,772 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:20:48,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:48,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:20:48,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:20:48,773 INFO L87 Difference]: Start difference. First operand 73 states and 145 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 19:20:48,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:48,893 INFO L93 Difference]: Finished difference Result 96 states and 184 transitions. [2021-06-12 19:20:48,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:20:48,893 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17 [2021-06-12 19:20:48,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:48,894 INFO L225 Difference]: With dead ends: 96 [2021-06-12 19:20:48,894 INFO L226 Difference]: Without dead ends: 89 [2021-06-12 19:20:48,894 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 180.6ms TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:20:48,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-06-12 19:20:48,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 71. [2021-06-12 19:20:48,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 2.0) internal successors, (140), 70 states have internal predecessors, (140), 0 states have call successors, (0), 0 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 19:20:48,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 140 transitions. [2021-06-12 19:20:48,895 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 140 transitions. Word has length 17 [2021-06-12 19:20:48,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:48,895 INFO L482 AbstractCegarLoop]: Abstraction has 71 states and 140 transitions. [2021-06-12 19:20:48,895 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 19:20:48,896 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 140 transitions. [2021-06-12 19:20:48,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:20:48,896 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:48,896 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:49,100 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:49,101 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:49,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:49,101 INFO L82 PathProgramCache]: Analyzing trace with hash 1845444760, now seen corresponding path program 28 times [2021-06-12 19:20:49,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:49,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075608940] [2021-06-12 19:20:49,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:49,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:49,172 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:49,172 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:49,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075608940] [2021-06-12 19:20:49,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075608940] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:49,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048620516] [2021-06-12 19:20:49,172 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 19:20:49,193 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:20:49,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:20:49,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:20:49,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:49,381 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:49,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048620516] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:49,381 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:49,381 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-06-12 19:20:49,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456116265] [2021-06-12 19:20:49,382 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:20:49,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:49,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:20:49,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:20:49,382 INFO L87 Difference]: Start difference. First operand 71 states and 140 transitions. Second operand has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 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 19:20:49,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:49,811 INFO L93 Difference]: Finished difference Result 112 states and 205 transitions. [2021-06-12 19:20:49,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 19:20:49,811 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 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 17 [2021-06-12 19:20:49,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:49,812 INFO L225 Difference]: With dead ends: 112 [2021-06-12 19:20:49,812 INFO L226 Difference]: Without dead ends: 76 [2021-06-12 19:20:49,812 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 522.7ms TimeCoverageRelationStatistics Valid=174, Invalid=756, Unknown=0, NotChecked=0, Total=930 [2021-06-12 19:20:49,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-06-12 19:20:49,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 73. [2021-06-12 19:20:49,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.9861111111111112) internal successors, (143), 72 states have internal predecessors, (143), 0 states have call successors, (0), 0 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 19:20:49,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 143 transitions. [2021-06-12 19:20:49,813 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 143 transitions. Word has length 17 [2021-06-12 19:20:49,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:49,814 INFO L482 AbstractCegarLoop]: Abstraction has 73 states and 143 transitions. [2021-06-12 19:20:49,814 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 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 19:20:49,814 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 143 transitions. [2021-06-12 19:20:49,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:20:49,814 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:49,814 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:50,019 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-06-12 19:20:50,019 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:50,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:50,020 INFO L82 PathProgramCache]: Analyzing trace with hash -695788720, now seen corresponding path program 29 times [2021-06-12 19:20:50,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:50,020 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185114198] [2021-06-12 19:20:50,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:50,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:50,092 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:50,092 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:50,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185114198] [2021-06-12 19:20:50,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185114198] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:50,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186525765] [2021-06-12 19:20:50,092 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 19:20:50,127 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 19:20:50,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:20:50,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:20:50,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:50,261 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:50,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [186525765] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:50,261 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:50,261 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-12 19:20:50,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143735064] [2021-06-12 19:20:50,262 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:20:50,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:50,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:20:50,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:20:50,262 INFO L87 Difference]: Start difference. First operand 73 states and 143 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 19:20:50,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:50,448 INFO L93 Difference]: Finished difference Result 95 states and 181 transitions. [2021-06-12 19:20:50,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:20:50,449 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17 [2021-06-12 19:20:50,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:50,449 INFO L225 Difference]: With dead ends: 95 [2021-06-12 19:20:50,449 INFO L226 Difference]: Without dead ends: 88 [2021-06-12 19:20:50,449 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 239.0ms TimeCoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:20:50,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-06-12 19:20:50,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 75. [2021-06-12 19:20:50,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.0) internal successors, (148), 74 states have internal predecessors, (148), 0 states have call successors, (0), 0 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 19:20:50,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 148 transitions. [2021-06-12 19:20:50,451 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 148 transitions. Word has length 17 [2021-06-12 19:20:50,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:50,451 INFO L482 AbstractCegarLoop]: Abstraction has 75 states and 148 transitions. [2021-06-12 19:20:50,451 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 19:20:50,451 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 148 transitions. [2021-06-12 19:20:50,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:20:50,451 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:50,451 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:50,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:50,665 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:50,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:50,665 INFO L82 PathProgramCache]: Analyzing trace with hash 1383505108, now seen corresponding path program 30 times [2021-06-12 19:20:50,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:50,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359253286] [2021-06-12 19:20:50,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:50,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:50,738 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:50,738 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:50,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359253286] [2021-06-12 19:20:50,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359253286] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:50,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459936207] [2021-06-12 19:20:50,739 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) [2021-06-12 19:20:50,767 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 19:20:50,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:20:50,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:20:50,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:50,908 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:50,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1459936207] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:50,908 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:50,908 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-12 19:20:50,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552472095] [2021-06-12 19:20:50,909 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:20:50,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:50,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:20:50,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:20:50,909 INFO L87 Difference]: Start difference. First operand 75 states and 148 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 19:20:51,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:51,160 INFO L93 Difference]: Finished difference Result 136 states and 258 transitions. [2021-06-12 19:20:51,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:20:51,161 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17 [2021-06-12 19:20:51,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:51,161 INFO L225 Difference]: With dead ends: 136 [2021-06-12 19:20:51,161 INFO L226 Difference]: Without dead ends: 129 [2021-06-12 19:20:51,161 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 274.4ms TimeCoverageRelationStatistics Valid=102, Invalid=360, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:20:51,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-06-12 19:20:51,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 76. [2021-06-12 19:20:51,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.026666666666667) internal successors, (152), 75 states have internal predecessors, (152), 0 states have call successors, (0), 0 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 19:20:51,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 152 transitions. [2021-06-12 19:20:51,163 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 152 transitions. Word has length 17 [2021-06-12 19:20:51,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:51,163 INFO L482 AbstractCegarLoop]: Abstraction has 76 states and 152 transitions. [2021-06-12 19:20:51,163 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 19:20:51,163 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 152 transitions. [2021-06-12 19:20:51,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:20:51,164 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:51,164 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:51,372 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-06-12 19:20:51,373 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:51,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:51,373 INFO L82 PathProgramCache]: Analyzing trace with hash 1398965904, now seen corresponding path program 31 times [2021-06-12 19:20:51,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:51,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376429909] [2021-06-12 19:20:51,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:51,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:51,471 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:51,471 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:51,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376429909] [2021-06-12 19:20:51,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376429909] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:51,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947751220] [2021-06-12 19:20:51,471 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 19:20:51,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:51,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:20:51,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:51,660 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:51,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947751220] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:51,661 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:51,661 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-12 19:20:51,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90290490] [2021-06-12 19:20:51,661 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:20:51,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:51,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:20:51,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:20:51,661 INFO L87 Difference]: Start difference. First operand 76 states and 152 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 19:20:51,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:51,967 INFO L93 Difference]: Finished difference Result 122 states and 238 transitions. [2021-06-12 19:20:51,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:20:51,967 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17 [2021-06-12 19:20:51,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:51,968 INFO L225 Difference]: With dead ends: 122 [2021-06-12 19:20:51,968 INFO L226 Difference]: Without dead ends: 115 [2021-06-12 19:20:51,968 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 326.9ms TimeCoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:20:51,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-06-12 19:20:51,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 74. [2021-06-12 19:20:51,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.9863013698630136) internal successors, (145), 73 states have internal predecessors, (145), 0 states have call successors, (0), 0 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 19:20:51,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 145 transitions. [2021-06-12 19:20:51,969 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 145 transitions. Word has length 17 [2021-06-12 19:20:51,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:51,970 INFO L482 AbstractCegarLoop]: Abstraction has 74 states and 145 transitions. [2021-06-12 19:20:51,970 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 19:20:51,970 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 145 transitions. [2021-06-12 19:20:51,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:20:51,970 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:51,970 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:52,170 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-06-12 19:20:52,170 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:52,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:52,171 INFO L82 PathProgramCache]: Analyzing trace with hash -765291428, now seen corresponding path program 32 times [2021-06-12 19:20:52,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:52,171 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70167888] [2021-06-12 19:20:52,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:52,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:52,259 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:52,259 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:52,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70167888] [2021-06-12 19:20:52,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70167888] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:52,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192061375] [2021-06-12 19:20:52,259 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 19:20:52,280 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:20:52,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:20:52,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:20:52,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:52,427 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:52,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192061375] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:52,427 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:52,427 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-12 19:20:52,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894356327] [2021-06-12 19:20:52,427 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:20:52,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:52,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:20:52,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:20:52,428 INFO L87 Difference]: Start difference. First operand 74 states and 145 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 19:20:52,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:52,692 INFO L93 Difference]: Finished difference Result 134 states and 256 transitions. [2021-06-12 19:20:52,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:20:52,692 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17 [2021-06-12 19:20:52,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:52,693 INFO L225 Difference]: With dead ends: 134 [2021-06-12 19:20:52,693 INFO L226 Difference]: Without dead ends: 127 [2021-06-12 19:20:52,693 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 300.1ms TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:20:52,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-06-12 19:20:52,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 76. [2021-06-12 19:20:52,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.026666666666667) internal successors, (152), 75 states have internal predecessors, (152), 0 states have call successors, (0), 0 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 19:20:52,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 152 transitions. [2021-06-12 19:20:52,709 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 152 transitions. Word has length 17 [2021-06-12 19:20:52,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:52,710 INFO L482 AbstractCegarLoop]: Abstraction has 76 states and 152 transitions. [2021-06-12 19:20:52,710 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 19:20:52,710 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 152 transitions. [2021-06-12 19:20:52,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:20:52,710 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:52,710 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:52,910 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-06-12 19:20:52,910 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:52,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:52,911 INFO L82 PathProgramCache]: Analyzing trace with hash -749830632, now seen corresponding path program 33 times [2021-06-12 19:20:52,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:52,911 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537510992] [2021-06-12 19:20:52,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:52,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:52,991 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:52,991 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:52,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537510992] [2021-06-12 19:20:52,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537510992] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:52,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591512511] [2021-06-12 19:20:52,991 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 19:20:53,021 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:20:53,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:20:53,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:20:53,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:53,180 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:53,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [591512511] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:53,180 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:53,180 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-12 19:20:53,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086856446] [2021-06-12 19:20:53,181 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:20:53,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:53,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:20:53,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:20:53,182 INFO L87 Difference]: Start difference. First operand 76 states and 152 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 19:20:53,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:53,530 INFO L93 Difference]: Finished difference Result 145 states and 275 transitions. [2021-06-12 19:20:53,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 19:20:53,530 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17 [2021-06-12 19:20:53,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:53,531 INFO L225 Difference]: With dead ends: 145 [2021-06-12 19:20:53,531 INFO L226 Difference]: Without dead ends: 138 [2021-06-12 19:20:53,531 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 367.9ms TimeCoverageRelationStatistics Valid=121, Invalid=479, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:20:53,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-06-12 19:20:53,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 75. [2021-06-12 19:20:53,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.0) internal successors, (148), 74 states have internal predecessors, (148), 0 states have call successors, (0), 0 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 19:20:53,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 148 transitions. [2021-06-12 19:20:53,533 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 148 transitions. Word has length 17 [2021-06-12 19:20:53,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:53,533 INFO L482 AbstractCegarLoop]: Abstraction has 75 states and 148 transitions. [2021-06-12 19:20:53,533 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 19:20:53,533 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 148 transitions. [2021-06-12 19:20:53,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:20:53,533 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:53,533 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:53,749 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-06-12 19:20:53,749 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:53,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:53,750 INFO L82 PathProgramCache]: Analyzing trace with hash -178375826, now seen corresponding path program 34 times [2021-06-12 19:20:53,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:53,750 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782272562] [2021-06-12 19:20:53,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:53,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:53,817 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:53,817 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:53,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782272562] [2021-06-12 19:20:53,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782272562] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:53,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102231713] [2021-06-12 19:20:53,818 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 19:20:53,839 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:20:53,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:20:53,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:20:53,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:53,993 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:53,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [102231713] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:53,993 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:53,993 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-12 19:20:53,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218239388] [2021-06-12 19:20:53,993 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:20:53,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:53,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:20:53,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:20:53,994 INFO L87 Difference]: Start difference. First operand 75 states and 148 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 19:20:54,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:54,231 INFO L93 Difference]: Finished difference Result 105 states and 200 transitions. [2021-06-12 19:20:54,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:20:54,231 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17 [2021-06-12 19:20:54,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:54,232 INFO L225 Difference]: With dead ends: 105 [2021-06-12 19:20:54,232 INFO L226 Difference]: Without dead ends: 98 [2021-06-12 19:20:54,232 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 274.4ms TimeCoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:20:54,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-06-12 19:20:54,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 73. [2021-06-12 19:20:54,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.9861111111111112) internal successors, (143), 72 states have internal predecessors, (143), 0 states have call successors, (0), 0 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 19:20:54,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 143 transitions. [2021-06-12 19:20:54,233 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 143 transitions. Word has length 17 [2021-06-12 19:20:54,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:54,233 INFO L482 AbstractCegarLoop]: Abstraction has 73 states and 143 transitions. [2021-06-12 19:20:54,233 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 19:20:54,234 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 143 transitions. [2021-06-12 19:20:54,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:20:54,234 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:54,234 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:54,440 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:54,441 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:54,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:54,441 INFO L82 PathProgramCache]: Analyzing trace with hash -1859383016, now seen corresponding path program 35 times [2021-06-12 19:20:54,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:54,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603600562] [2021-06-12 19:20:54,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:54,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:54,517 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:54,517 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:54,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603600562] [2021-06-12 19:20:54,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603600562] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:54,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649898092] [2021-06-12 19:20:54,518 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 19:20:54,540 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 19:20:54,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:20:54,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:20:54,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:54,687 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:54,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649898092] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:54,688 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:54,688 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-12 19:20:54,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864255933] [2021-06-12 19:20:54,688 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:20:54,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:54,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:20:54,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:20:54,688 INFO L87 Difference]: Start difference. First operand 73 states and 143 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 19:20:55,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:55,051 INFO L93 Difference]: Finished difference Result 154 states and 296 transitions. [2021-06-12 19:20:55,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 19:20:55,051 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17 [2021-06-12 19:20:55,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:55,051 INFO L225 Difference]: With dead ends: 154 [2021-06-12 19:20:55,052 INFO L226 Difference]: Without dead ends: 147 [2021-06-12 19:20:55,052 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 322.0ms TimeCoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:20:55,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-06-12 19:20:55,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 76. [2021-06-12 19:20:55,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.0533333333333332) internal successors, (154), 75 states have internal predecessors, (154), 0 states have call successors, (0), 0 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 19:20:55,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 154 transitions. [2021-06-12 19:20:55,053 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 154 transitions. Word has length 17 [2021-06-12 19:20:55,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:55,053 INFO L482 AbstractCegarLoop]: Abstraction has 76 states and 154 transitions. [2021-06-12 19:20:55,053 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 19:20:55,054 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 154 transitions. [2021-06-12 19:20:55,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:20:55,054 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:55,054 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:55,269 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-06-12 19:20:55,270 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:55,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:55,270 INFO L82 PathProgramCache]: Analyzing trace with hash -1843922220, now seen corresponding path program 36 times [2021-06-12 19:20:55,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:55,270 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982531241] [2021-06-12 19:20:55,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:55,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:55,344 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:55,344 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:55,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982531241] [2021-06-12 19:20:55,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982531241] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:55,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396615401] [2021-06-12 19:20:55,345 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 19:20:55,365 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 19:20:55,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:20:55,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:20:55,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:55,516 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:55,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396615401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:55,516 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:55,516 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-12 19:20:55,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403771791] [2021-06-12 19:20:55,516 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:20:55,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:55,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:20:55,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:20:55,517 INFO L87 Difference]: Start difference. First operand 76 states and 154 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 19:20:55,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:55,908 INFO L93 Difference]: Finished difference Result 168 states and 320 transitions. [2021-06-12 19:20:55,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 19:20:55,908 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17 [2021-06-12 19:20:55,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:55,909 INFO L225 Difference]: With dead ends: 168 [2021-06-12 19:20:55,909 INFO L226 Difference]: Without dead ends: 161 [2021-06-12 19:20:55,909 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 348.8ms TimeCoverageRelationStatistics Valid=122, Invalid=528, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:20:55,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-06-12 19:20:55,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 75. [2021-06-12 19:20:55,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.027027027027027) internal successors, (150), 74 states have internal predecessors, (150), 0 states have call successors, (0), 0 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 19:20:55,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 150 transitions. [2021-06-12 19:20:55,911 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 150 transitions. Word has length 17 [2021-06-12 19:20:55,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:55,911 INFO L482 AbstractCegarLoop]: Abstraction has 75 states and 150 transitions. [2021-06-12 19:20:55,911 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 19:20:55,911 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 150 transitions. [2021-06-12 19:20:55,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:20:55,911 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:55,911 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:56,124 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:56,125 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:56,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:56,125 INFO L82 PathProgramCache]: Analyzing trace with hash -1272467414, now seen corresponding path program 37 times [2021-06-12 19:20:56,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:56,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776009706] [2021-06-12 19:20:56,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:56,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:56,192 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:56,192 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:56,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776009706] [2021-06-12 19:20:56,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776009706] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:56,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805783214] [2021-06-12 19:20:56,192 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 19:20:56,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:56,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:20:56,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:56,354 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:56,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805783214] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:56,354 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:56,354 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-12 19:20:56,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764081339] [2021-06-12 19:20:56,354 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:20:56,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:56,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:20:56,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:20:56,355 INFO L87 Difference]: Start difference. First operand 75 states and 150 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 19:20:56,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:56,651 INFO L93 Difference]: Finished difference Result 126 states and 240 transitions. [2021-06-12 19:20:56,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 19:20:56,651 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17 [2021-06-12 19:20:56,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:56,652 INFO L225 Difference]: With dead ends: 126 [2021-06-12 19:20:56,652 INFO L226 Difference]: Without dead ends: 119 [2021-06-12 19:20:56,652 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 311.4ms TimeCoverageRelationStatistics Valid=111, Invalid=539, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:20:56,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-06-12 19:20:56,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 74. [2021-06-12 19:20:56,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 2.0136986301369864) internal successors, (147), 73 states have internal predecessors, (147), 0 states have call successors, (0), 0 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 19:20:56,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 147 transitions. [2021-06-12 19:20:56,653 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 147 transitions. Word has length 17 [2021-06-12 19:20:56,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:56,653 INFO L482 AbstractCegarLoop]: Abstraction has 74 states and 147 transitions. [2021-06-12 19:20:56,653 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 19:20:56,654 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 147 transitions. [2021-06-12 19:20:56,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:20:56,654 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:56,654 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:56,869 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:56,870 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:56,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:56,870 INFO L82 PathProgramCache]: Analyzing trace with hash 164948120, now seen corresponding path program 38 times [2021-06-12 19:20:56,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:56,870 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074760863] [2021-06-12 19:20:56,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:56,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:56,934 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:56,934 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:56,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074760863] [2021-06-12 19:20:56,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074760863] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:56,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404960046] [2021-06-12 19:20:56,935 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 19:20:56,955 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:20:56,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:20:56,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:20:56,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:57,114 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:57,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404960046] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:57,114 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:57,114 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-06-12 19:20:57,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31592700] [2021-06-12 19:20:57,114 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:20:57,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:57,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:20:57,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:20:57,115 INFO L87 Difference]: Start difference. First operand 74 states and 147 transitions. Second operand has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 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 19:20:57,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:57,551 INFO L93 Difference]: Finished difference Result 140 states and 249 transitions. [2021-06-12 19:20:57,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:20:57,551 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 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 17 [2021-06-12 19:20:57,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:57,552 INFO L225 Difference]: With dead ends: 140 [2021-06-12 19:20:57,552 INFO L226 Difference]: Without dead ends: 107 [2021-06-12 19:20:57,552 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 491.4ms TimeCoverageRelationStatistics Valid=176, Invalid=754, Unknown=0, NotChecked=0, Total=930 [2021-06-12 19:20:57,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-06-12 19:20:57,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 79. [2021-06-12 19:20:57,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.0128205128205128) internal successors, (157), 78 states have internal predecessors, (157), 0 states have call successors, (0), 0 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 19:20:57,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 157 transitions. [2021-06-12 19:20:57,554 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 157 transitions. Word has length 17 [2021-06-12 19:20:57,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:57,554 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 157 transitions. [2021-06-12 19:20:57,554 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 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 19:20:57,554 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 157 transitions. [2021-06-12 19:20:57,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:20:57,554 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:57,554 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:57,754 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-06-12 19:20:57,755 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:57,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:57,755 INFO L82 PathProgramCache]: Analyzing trace with hash -217772268, now seen corresponding path program 39 times [2021-06-12 19:20:57,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:57,755 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183934849] [2021-06-12 19:20:57,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:57,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:57,817 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:57,817 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:57,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183934849] [2021-06-12 19:20:57,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183934849] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:57,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502347439] [2021-06-12 19:20:57,818 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) [2021-06-12 19:20:57,844 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:20:57,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:20:57,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:20:57,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:57,997 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:57,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [502347439] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:57,997 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:57,997 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-06-12 19:20:57,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361748252] [2021-06-12 19:20:57,997 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:20:57,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:57,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:20:57,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:20:57,998 INFO L87 Difference]: Start difference. First operand 79 states and 157 transitions. Second operand has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 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 19:20:58,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:58,292 INFO L93 Difference]: Finished difference Result 111 states and 210 transitions. [2021-06-12 19:20:58,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:20:58,292 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 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 17 [2021-06-12 19:20:58,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:58,293 INFO L225 Difference]: With dead ends: 111 [2021-06-12 19:20:58,293 INFO L226 Difference]: Without dead ends: 104 [2021-06-12 19:20:58,293 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 354.1ms TimeCoverageRelationStatistics Valid=111, Invalid=489, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:20:58,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-06-12 19:20:58,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 77. [2021-06-12 19:20:58,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 2.0) internal successors, (152), 76 states have internal predecessors, (152), 0 states have call successors, (0), 0 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 19:20:58,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 152 transitions. [2021-06-12 19:20:58,294 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 152 transitions. Word has length 17 [2021-06-12 19:20:58,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:58,295 INFO L482 AbstractCegarLoop]: Abstraction has 77 states and 152 transitions. [2021-06-12 19:20:58,295 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 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 19:20:58,295 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 152 transitions. [2021-06-12 19:20:58,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:20:58,295 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:58,295 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:58,510 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-06-12 19:20:58,511 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:58,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:58,511 INFO L82 PathProgramCache]: Analyzing trace with hash 1861521560, now seen corresponding path program 40 times [2021-06-12 19:20:58,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:58,511 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492352906] [2021-06-12 19:20:58,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:58,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:58,587 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:58,587 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:58,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492352906] [2021-06-12 19:20:58,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492352906] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:58,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163728152] [2021-06-12 19:20:58,587 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) [2021-06-12 19:20:58,615 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:20:58,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:20:58,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:20:58,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:58,789 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:58,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1163728152] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:58,790 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:58,790 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-06-12 19:20:58,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159206722] [2021-06-12 19:20:58,790 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:20:58,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:58,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:20:58,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:20:58,790 INFO L87 Difference]: Start difference. First operand 77 states and 152 transitions. Second operand has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 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 19:20:59,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:59,324 INFO L93 Difference]: Finished difference Result 182 states and 330 transitions. [2021-06-12 19:20:59,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 19:20:59,324 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 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 17 [2021-06-12 19:20:59,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:59,325 INFO L225 Difference]: With dead ends: 182 [2021-06-12 19:20:59,325 INFO L226 Difference]: Without dead ends: 175 [2021-06-12 19:20:59,325 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 596.4ms TimeCoverageRelationStatistics Valid=206, Invalid=850, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 19:20:59,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-06-12 19:20:59,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 78. [2021-06-12 19:20:59,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.0259740259740258) internal successors, (156), 77 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 19:20:59,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 156 transitions. [2021-06-12 19:20:59,327 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 156 transitions. Word has length 17 [2021-06-12 19:20:59,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:59,327 INFO L482 AbstractCegarLoop]: Abstraction has 78 states and 156 transitions. [2021-06-12 19:20:59,327 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 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 19:20:59,327 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 156 transitions. [2021-06-12 19:20:59,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:20:59,327 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:59,327 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:59,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-06-12 19:20:59,528 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:59,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:59,528 INFO L82 PathProgramCache]: Analyzing trace with hash 1876982356, now seen corresponding path program 41 times [2021-06-12 19:20:59,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:59,528 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682770066] [2021-06-12 19:20:59,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:59,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:59,604 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:59,604 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:59,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682770066] [2021-06-12 19:20:59,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682770066] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:59,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112182733] [2021-06-12 19:20:59,604 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 19:20:59,624 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:20:59,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:20:59,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:20:59,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:59,799 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:59,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112182733] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:59,800 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:59,800 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-06-12 19:20:59,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885718102] [2021-06-12 19:20:59,800 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:20:59,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:59,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:20:59,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:20:59,800 INFO L87 Difference]: Start difference. First operand 78 states and 156 transitions. Second operand has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 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 19:21:00,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:00,397 INFO L93 Difference]: Finished difference Result 174 states and 320 transitions. [2021-06-12 19:21:00,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 19:21:00,398 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 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 17 [2021-06-12 19:21:00,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:00,398 INFO L225 Difference]: With dead ends: 174 [2021-06-12 19:21:00,398 INFO L226 Difference]: Without dead ends: 167 [2021-06-12 19:21:00,399 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 605.4ms TimeCoverageRelationStatistics Valid=203, Invalid=987, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 19:21:00,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-06-12 19:21:00,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 77. [2021-06-12 19:21:00,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 2.0) internal successors, (152), 76 states have internal predecessors, (152), 0 states have call successors, (0), 0 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 19:21:00,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 152 transitions. [2021-06-12 19:21:00,400 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 152 transitions. Word has length 17 [2021-06-12 19:21:00,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:00,400 INFO L482 AbstractCegarLoop]: Abstraction has 77 states and 152 transitions. [2021-06-12 19:21:00,400 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 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 19:21:00,401 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 152 transitions. [2021-06-12 19:21:00,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:21:00,401 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:00,401 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:00,608 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:00,609 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:00,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:00,609 INFO L82 PathProgramCache]: Analyzing trace with hash -1810322992, now seen corresponding path program 42 times [2021-06-12 19:21:00,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:00,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700159338] [2021-06-12 19:21:00,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:00,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:00,679 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:00,679 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:00,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700159338] [2021-06-12 19:21:00,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700159338] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:00,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178173543] [2021-06-12 19:21:00,679 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 19:21:00,701 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:21:00,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:00,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:21:00,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:00,832 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:00,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178173543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:00,833 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:00,833 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-12 19:21:00,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695525507] [2021-06-12 19:21:00,833 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:21:00,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:00,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:21:00,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:21:00,833 INFO L87 Difference]: Start difference. First operand 77 states and 152 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 19:21:01,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:01,086 INFO L93 Difference]: Finished difference Result 127 states and 236 transitions. [2021-06-12 19:21:01,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:21:01,086 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17 [2021-06-12 19:21:01,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:01,087 INFO L225 Difference]: With dead ends: 127 [2021-06-12 19:21:01,087 INFO L226 Difference]: Without dead ends: 113 [2021-06-12 19:21:01,087 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 287.0ms TimeCoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:21:01,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-06-12 19:21:01,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 84. [2021-06-12 19:21:01,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.9879518072289157) internal successors, (165), 83 states have internal predecessors, (165), 0 states have call successors, (0), 0 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 19:21:01,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 165 transitions. [2021-06-12 19:21:01,089 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 165 transitions. Word has length 17 [2021-06-12 19:21:01,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:01,089 INFO L482 AbstractCegarLoop]: Abstraction has 84 states and 165 transitions. [2021-06-12 19:21:01,089 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 19:21:01,089 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 165 transitions. [2021-06-12 19:21:01,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:21:01,089 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:01,089 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:01,305 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-06-12 19:21:01,305 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:01,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:01,305 INFO L82 PathProgramCache]: Analyzing trace with hash 1561329620, now seen corresponding path program 43 times [2021-06-12 19:21:01,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:01,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578773159] [2021-06-12 19:21:01,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:01,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:01,374 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:01,374 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:01,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578773159] [2021-06-12 19:21:01,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578773159] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:01,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521655078] [2021-06-12 19:21:01,374 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 19:21:01,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:01,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:21:01,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:01,519 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:01,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521655078] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:01,520 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:01,520 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-12 19:21:01,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356520863] [2021-06-12 19:21:01,520 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:21:01,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:01,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:21:01,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:21:01,520 INFO L87 Difference]: Start difference. First operand 84 states and 165 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:01,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:01,880 INFO L93 Difference]: Finished difference Result 163 states and 312 transitions. [2021-06-12 19:21:01,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 19:21:01,881 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:21:01,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:01,881 INFO L225 Difference]: With dead ends: 163 [2021-06-12 19:21:01,881 INFO L226 Difference]: Without dead ends: 156 [2021-06-12 19:21:01,881 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 296.6ms TimeCoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:21:01,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-06-12 19:21:01,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 87. [2021-06-12 19:21:01,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 2.046511627906977) internal successors, (176), 86 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 19:21:01,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 176 transitions. [2021-06-12 19:21:01,883 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 176 transitions. Word has length 17 [2021-06-12 19:21:01,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:01,883 INFO L482 AbstractCegarLoop]: Abstraction has 87 states and 176 transitions. [2021-06-12 19:21:01,883 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:01,883 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 176 transitions. [2021-06-12 19:21:01,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:21:01,883 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:01,883 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:02,091 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-06-12 19:21:02,091 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:02,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:02,092 INFO L82 PathProgramCache]: Analyzing trace with hash 1576790416, now seen corresponding path program 44 times [2021-06-12 19:21:02,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:02,092 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878588584] [2021-06-12 19:21:02,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:02,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:02,165 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:02,165 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:02,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878588584] [2021-06-12 19:21:02,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878588584] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:02,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219166054] [2021-06-12 19:21:02,165 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 19:21:02,186 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:21:02,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:02,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:21:02,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:02,335 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:02,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219166054] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:02,335 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:02,335 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-12 19:21:02,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336694756] [2021-06-12 19:21:02,336 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:21:02,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:02,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:21:02,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:21:02,336 INFO L87 Difference]: Start difference. First operand 87 states and 176 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:02,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:02,790 INFO L93 Difference]: Finished difference Result 175 states and 333 transitions. [2021-06-12 19:21:02,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:21:02,790 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:21:02,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:02,791 INFO L225 Difference]: With dead ends: 175 [2021-06-12 19:21:02,791 INFO L226 Difference]: Without dead ends: 168 [2021-06-12 19:21:02,791 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 378.9ms TimeCoverageRelationStatistics Valid=131, Invalid=519, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:21:02,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-06-12 19:21:02,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 86. [2021-06-12 19:21:02,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 2.023529411764706) internal successors, (172), 85 states have internal predecessors, (172), 0 states have call successors, (0), 0 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 19:21:02,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 172 transitions. [2021-06-12 19:21:02,793 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 172 transitions. Word has length 17 [2021-06-12 19:21:02,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:02,793 INFO L482 AbstractCegarLoop]: Abstraction has 86 states and 172 transitions. [2021-06-12 19:21:02,793 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:02,793 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 172 transitions. [2021-06-12 19:21:02,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:21:02,793 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:02,793 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:03,008 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:03,009 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:03,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:03,009 INFO L82 PathProgramCache]: Analyzing trace with hash -2146722074, now seen corresponding path program 45 times [2021-06-12 19:21:03,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:03,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395632949] [2021-06-12 19:21:03,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:03,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:03,082 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:03,082 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:03,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395632949] [2021-06-12 19:21:03,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395632949] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:03,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749273475] [2021-06-12 19:21:03,082 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) [2021-06-12 19:21:03,104 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:21:03,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:03,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:21:03,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:03,246 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:03,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749273475] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:03,247 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:03,247 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-12 19:21:03,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677857168] [2021-06-12 19:21:03,247 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:21:03,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:03,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:21:03,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:21:03,247 INFO L87 Difference]: Start difference. First operand 86 states and 172 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:03,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:03,588 INFO L93 Difference]: Finished difference Result 138 states and 262 transitions. [2021-06-12 19:21:03,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:21:03,589 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:21:03,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:03,589 INFO L225 Difference]: With dead ends: 138 [2021-06-12 19:21:03,589 INFO L226 Difference]: Without dead ends: 131 [2021-06-12 19:21:03,589 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 373.5ms TimeCoverageRelationStatistics Valid=113, Invalid=487, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:21:03,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-06-12 19:21:03,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 86. [2021-06-12 19:21:03,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 2.023529411764706) internal successors, (172), 85 states have internal predecessors, (172), 0 states have call successors, (0), 0 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 19:21:03,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 172 transitions. [2021-06-12 19:21:03,591 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 172 transitions. Word has length 17 [2021-06-12 19:21:03,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:03,591 INFO L482 AbstractCegarLoop]: Abstraction has 86 states and 172 transitions. [2021-06-12 19:21:03,591 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:03,591 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 172 transitions. [2021-06-12 19:21:03,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:21:03,591 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:03,591 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:03,791 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-06-12 19:21:03,792 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:03,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:03,792 INFO L82 PathProgramCache]: Analyzing trace with hash -709306540, now seen corresponding path program 46 times [2021-06-12 19:21:03,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:03,792 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841543086] [2021-06-12 19:21:03,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:03,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:03,867 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:03,867 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:03,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841543086] [2021-06-12 19:21:03,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841543086] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:03,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288928574] [2021-06-12 19:21:03,867 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 19:21:03,888 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:21:03,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:03,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:21:03,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:04,023 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:04,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288928574] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:04,023 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:04,023 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-12 19:21:04,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475302742] [2021-06-12 19:21:04,023 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:21:04,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:04,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:21:04,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:21:04,024 INFO L87 Difference]: Start difference. First operand 86 states and 172 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:04,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:04,279 INFO L93 Difference]: Finished difference Result 145 states and 268 transitions. [2021-06-12 19:21:04,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:21:04,280 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:21:04,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:04,280 INFO L225 Difference]: With dead ends: 145 [2021-06-12 19:21:04,280 INFO L226 Difference]: Without dead ends: 131 [2021-06-12 19:21:04,280 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 287.2ms TimeCoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:21:04,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-06-12 19:21:04,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 96. [2021-06-12 19:21:04,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 2.0526315789473686) internal successors, (195), 95 states have internal predecessors, (195), 0 states have call successors, (0), 0 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 19:21:04,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 195 transitions. [2021-06-12 19:21:04,282 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 195 transitions. Word has length 17 [2021-06-12 19:21:04,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:04,282 INFO L482 AbstractCegarLoop]: Abstraction has 96 states and 195 transitions. [2021-06-12 19:21:04,282 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:04,282 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 195 transitions. [2021-06-12 19:21:04,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:21:04,283 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:04,283 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:04,489 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:04,489 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:04,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:04,489 INFO L82 PathProgramCache]: Analyzing trace with hash -1092026928, now seen corresponding path program 47 times [2021-06-12 19:21:04,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:04,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455223685] [2021-06-12 19:21:04,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:04,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:04,554 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:04,554 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:04,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455223685] [2021-06-12 19:21:04,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455223685] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:04,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086166678] [2021-06-12 19:21:04,554 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 19:21:04,599 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 19:21:04,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:04,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:21:04,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:04,740 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:04,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086166678] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:04,740 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:04,740 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-12 19:21:04,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766841701] [2021-06-12 19:21:04,740 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:21:04,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:04,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:21:04,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:21:04,741 INFO L87 Difference]: Start difference. First operand 96 states and 195 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:05,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:05,025 INFO L93 Difference]: Finished difference Result 134 states and 261 transitions. [2021-06-12 19:21:05,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:21:05,025 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:21:05,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:05,025 INFO L225 Difference]: With dead ends: 134 [2021-06-12 19:21:05,025 INFO L226 Difference]: Without dead ends: 127 [2021-06-12 19:21:05,026 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 302.0ms TimeCoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:21:05,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-06-12 19:21:05,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 97. [2021-06-12 19:21:05,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 2.0625) internal successors, (198), 96 states have internal predecessors, (198), 0 states have call successors, (0), 0 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 19:21:05,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 198 transitions. [2021-06-12 19:21:05,027 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 198 transitions. Word has length 17 [2021-06-12 19:21:05,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:05,027 INFO L482 AbstractCegarLoop]: Abstraction has 97 states and 198 transitions. [2021-06-12 19:21:05,027 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:05,027 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 198 transitions. [2021-06-12 19:21:05,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:21:05,028 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:05,028 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:05,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-06-12 19:21:05,229 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:05,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:05,229 INFO L82 PathProgramCache]: Analyzing trace with hash 987266900, now seen corresponding path program 48 times [2021-06-12 19:21:05,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:05,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861948693] [2021-06-12 19:21:05,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:05,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:05,298 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:05,298 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:05,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861948693] [2021-06-12 19:21:05,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861948693] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:05,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436977701] [2021-06-12 19:21:05,298 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 19:21:05,319 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 19:21:05,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:05,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:21:05,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:05,456 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:05,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436977701] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:05,457 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:05,457 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-12 19:21:05,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118563510] [2021-06-12 19:21:05,457 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:21:05,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:05,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:21:05,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:21:05,457 INFO L87 Difference]: Start difference. First operand 97 states and 198 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:05,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:05,836 INFO L93 Difference]: Finished difference Result 175 states and 338 transitions. [2021-06-12 19:21:05,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 19:21:05,837 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:21:05,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:05,837 INFO L225 Difference]: With dead ends: 175 [2021-06-12 19:21:05,837 INFO L226 Difference]: Without dead ends: 168 [2021-06-12 19:21:05,837 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 364.6ms TimeCoverageRelationStatistics Valid=123, Invalid=477, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:21:05,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-06-12 19:21:05,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 98. [2021-06-12 19:21:05,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.082474226804124) internal successors, (202), 97 states have internal predecessors, (202), 0 states have call successors, (0), 0 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 19:21:05,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 202 transitions. [2021-06-12 19:21:05,839 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 202 transitions. Word has length 17 [2021-06-12 19:21:05,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:05,839 INFO L482 AbstractCegarLoop]: Abstraction has 98 states and 202 transitions. [2021-06-12 19:21:05,839 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:05,839 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 202 transitions. [2021-06-12 19:21:05,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:21:05,840 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:05,840 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:06,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-06-12 19:21:06,053 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:06,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:06,053 INFO L82 PathProgramCache]: Analyzing trace with hash 1002727696, now seen corresponding path program 49 times [2021-06-12 19:21:06,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:06,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569330091] [2021-06-12 19:21:06,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:06,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:06,125 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:06,125 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:06,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569330091] [2021-06-12 19:21:06,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569330091] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:06,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239496426] [2021-06-12 19:21:06,126 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 19:21:06,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:06,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:21:06,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:06,273 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:06,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239496426] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:06,274 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:06,274 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-12 19:21:06,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447540450] [2021-06-12 19:21:06,274 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:21:06,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:06,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:21:06,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:21:06,274 INFO L87 Difference]: Start difference. First operand 98 states and 202 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:06,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:06,590 INFO L93 Difference]: Finished difference Result 165 states and 325 transitions. [2021-06-12 19:21:06,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 19:21:06,591 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:21:06,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:06,591 INFO L225 Difference]: With dead ends: 165 [2021-06-12 19:21:06,591 INFO L226 Difference]: Without dead ends: 158 [2021-06-12 19:21:06,591 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 296.0ms TimeCoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:21:06,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-06-12 19:21:06,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 96. [2021-06-12 19:21:06,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 2.0526315789473686) internal successors, (195), 95 states have internal predecessors, (195), 0 states have call successors, (0), 0 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 19:21:06,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 195 transitions. [2021-06-12 19:21:06,593 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 195 transitions. Word has length 17 [2021-06-12 19:21:06,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:06,593 INFO L482 AbstractCegarLoop]: Abstraction has 96 states and 195 transitions. [2021-06-12 19:21:06,593 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:06,593 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 195 transitions. [2021-06-12 19:21:06,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:21:06,594 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:06,594 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:06,805 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:06,805 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:06,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:06,805 INFO L82 PathProgramCache]: Analyzing trace with hash 1610389644, now seen corresponding path program 50 times [2021-06-12 19:21:06,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:06,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927193358] [2021-06-12 19:21:06,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:06,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:06,902 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:06,902 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:06,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927193358] [2021-06-12 19:21:06,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927193358] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:06,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525207573] [2021-06-12 19:21:06,902 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-12 19:21:06,932 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:21:06,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:06,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:21:06,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:07,073 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:07,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525207573] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:07,074 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:07,074 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-12 19:21:07,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639437796] [2021-06-12 19:21:07,074 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:21:07,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:07,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:21:07,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:21:07,075 INFO L87 Difference]: Start difference. First operand 96 states and 195 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:07,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:07,462 INFO L93 Difference]: Finished difference Result 162 states and 306 transitions. [2021-06-12 19:21:07,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 19:21:07,462 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:21:07,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:07,463 INFO L225 Difference]: With dead ends: 162 [2021-06-12 19:21:07,463 INFO L226 Difference]: Without dead ends: 148 [2021-06-12 19:21:07,463 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 422.2ms TimeCoverageRelationStatistics Valid=148, Invalid=608, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:21:07,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-06-12 19:21:07,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 101. [2021-06-12 19:21:07,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 2.02) internal successors, (202), 100 states have internal predecessors, (202), 0 states have call successors, (0), 0 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 19:21:07,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 202 transitions. [2021-06-12 19:21:07,464 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 202 transitions. Word has length 17 [2021-06-12 19:21:07,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:07,465 INFO L482 AbstractCegarLoop]: Abstraction has 101 states and 202 transitions. [2021-06-12 19:21:07,465 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:07,465 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 202 transitions. [2021-06-12 19:21:07,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:21:07,465 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:07,465 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:07,665 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-06-12 19:21:07,665 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:07,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:07,666 INFO L82 PathProgramCache]: Analyzing trace with hash -79334396, now seen corresponding path program 51 times [2021-06-12 19:21:07,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:07,666 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596686187] [2021-06-12 19:21:07,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:07,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:07,744 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:07,744 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:07,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596686187] [2021-06-12 19:21:07,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596686187] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:07,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929268599] [2021-06-12 19:21:07,745 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 19:21:07,768 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:21:07,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:07,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:21:07,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:07,981 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:07,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929268599] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:07,981 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:07,982 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-12 19:21:07,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519279547] [2021-06-12 19:21:07,982 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:21:07,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:07,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:21:07,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:21:07,982 INFO L87 Difference]: Start difference. First operand 101 states and 202 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:08,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:08,226 INFO L93 Difference]: Finished difference Result 121 states and 234 transitions. [2021-06-12 19:21:08,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:21:08,227 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:21:08,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:08,227 INFO L225 Difference]: With dead ends: 121 [2021-06-12 19:21:08,227 INFO L226 Difference]: Without dead ends: 114 [2021-06-12 19:21:08,227 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 262.7ms TimeCoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:21:08,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-06-12 19:21:08,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 97. [2021-06-12 19:21:08,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 2.0208333333333335) internal successors, (194), 96 states have internal predecessors, (194), 0 states have call successors, (0), 0 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 19:21:08,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 194 transitions. [2021-06-12 19:21:08,229 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 194 transitions. Word has length 17 [2021-06-12 19:21:08,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:08,229 INFO L482 AbstractCegarLoop]: Abstraction has 97 states and 194 transitions. [2021-06-12 19:21:08,229 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:08,229 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 194 transitions. [2021-06-12 19:21:08,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:21:08,229 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:08,229 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:08,436 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:08,437 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:08,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:08,437 INFO L82 PathProgramCache]: Analyzing trace with hash 1999959432, now seen corresponding path program 52 times [2021-06-12 19:21:08,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:08,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299809011] [2021-06-12 19:21:08,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:08,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:08,531 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:08,531 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:08,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299809011] [2021-06-12 19:21:08,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299809011] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:08,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953093467] [2021-06-12 19:21:08,531 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 19:21:08,551 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:21:08,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:08,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:21:08,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:08,692 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:08,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953093467] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:08,693 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:08,693 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-12 19:21:08,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036641694] [2021-06-12 19:21:08,693 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:21:08,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:08,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:21:08,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:21:08,693 INFO L87 Difference]: Start difference. First operand 97 states and 194 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:09,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:09,010 INFO L93 Difference]: Finished difference Result 160 states and 307 transitions. [2021-06-12 19:21:09,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:21:09,010 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:21:09,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:09,010 INFO L225 Difference]: With dead ends: 160 [2021-06-12 19:21:09,010 INFO L226 Difference]: Without dead ends: 153 [2021-06-12 19:21:09,011 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 337.4ms TimeCoverageRelationStatistics Valid=111, Invalid=395, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:21:09,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-06-12 19:21:09,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 98. [2021-06-12 19:21:09,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.0412371134020617) internal successors, (198), 97 states have internal predecessors, (198), 0 states have call successors, (0), 0 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 19:21:09,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 198 transitions. [2021-06-12 19:21:09,012 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 198 transitions. Word has length 17 [2021-06-12 19:21:09,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:09,012 INFO L482 AbstractCegarLoop]: Abstraction has 98 states and 198 transitions. [2021-06-12 19:21:09,012 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:09,012 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 198 transitions. [2021-06-12 19:21:09,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:21:09,013 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:09,013 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:09,213 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-06-12 19:21:09,213 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:09,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:09,213 INFO L82 PathProgramCache]: Analyzing trace with hash 2015420228, now seen corresponding path program 53 times [2021-06-12 19:21:09,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:09,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119806864] [2021-06-12 19:21:09,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:09,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:09,294 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:09,294 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:09,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119806864] [2021-06-12 19:21:09,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119806864] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:09,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999042060] [2021-06-12 19:21:09,294 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 19:21:09,316 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:21:09,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:09,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:21:09,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:09,440 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:09,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999042060] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:09,440 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:09,440 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-12 19:21:09,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239772301] [2021-06-12 19:21:09,440 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:21:09,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:09,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:21:09,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:21:09,441 INFO L87 Difference]: Start difference. First operand 98 states and 198 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:09,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:09,684 INFO L93 Difference]: Finished difference Result 152 states and 297 transitions. [2021-06-12 19:21:09,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:21:09,684 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:21:09,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:09,685 INFO L225 Difference]: With dead ends: 152 [2021-06-12 19:21:09,685 INFO L226 Difference]: Without dead ends: 145 [2021-06-12 19:21:09,685 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 266.1ms TimeCoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:21:09,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-06-12 19:21:09,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 96. [2021-06-12 19:21:09,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 2.0105263157894737) internal successors, (191), 95 states have internal predecessors, (191), 0 states have call successors, (0), 0 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 19:21:09,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 191 transitions. [2021-06-12 19:21:09,691 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 191 transitions. Word has length 17 [2021-06-12 19:21:09,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:09,691 INFO L482 AbstractCegarLoop]: Abstraction has 96 states and 191 transitions. [2021-06-12 19:21:09,691 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:09,691 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 191 transitions. [2021-06-12 19:21:09,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:21:09,691 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:09,691 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:09,892 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-06-12 19:21:09,892 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:09,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:09,892 INFO L82 PathProgramCache]: Analyzing trace with hash -148837104, now seen corresponding path program 54 times [2021-06-12 19:21:09,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:09,892 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646991032] [2021-06-12 19:21:09,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:09,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:09,969 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:09,969 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:09,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646991032] [2021-06-12 19:21:09,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646991032] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:09,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833830358] [2021-06-12 19:21:09,969 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 19:21:09,994 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 19:21:09,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:09,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:21:09,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:10,110 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:10,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833830358] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:10,110 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:10,110 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-12 19:21:10,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486433648] [2021-06-12 19:21:10,111 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:21:10,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:10,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:21:10,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:21:10,111 INFO L87 Difference]: Start difference. First operand 96 states and 191 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:10,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:10,316 INFO L93 Difference]: Finished difference Result 155 states and 299 transitions. [2021-06-12 19:21:10,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:21:10,316 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:21:10,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:10,317 INFO L225 Difference]: With dead ends: 155 [2021-06-12 19:21:10,317 INFO L226 Difference]: Without dead ends: 148 [2021-06-12 19:21:10,317 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 236.7ms TimeCoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:21:10,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-06-12 19:21:10,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 98. [2021-06-12 19:21:10,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.0412371134020617) internal successors, (198), 97 states have internal predecessors, (198), 0 states have call successors, (0), 0 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 19:21:10,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 198 transitions. [2021-06-12 19:21:10,318 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 198 transitions. Word has length 17 [2021-06-12 19:21:10,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:10,319 INFO L482 AbstractCegarLoop]: Abstraction has 98 states and 198 transitions. [2021-06-12 19:21:10,319 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:10,319 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 198 transitions. [2021-06-12 19:21:10,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:21:10,319 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:10,319 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:10,519 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:10,519 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:10,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:10,520 INFO L82 PathProgramCache]: Analyzing trace with hash -133376308, now seen corresponding path program 55 times [2021-06-12 19:21:10,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:10,520 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249436703] [2021-06-12 19:21:10,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:10,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:10,593 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:10,593 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:10,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249436703] [2021-06-12 19:21:10,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249436703] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:10,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775619628] [2021-06-12 19:21:10,593 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) [2021-06-12 19:21:10,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:10,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:21:10,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:10,762 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:10,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775619628] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:10,762 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:10,762 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-12 19:21:10,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658051321] [2021-06-12 19:21:10,762 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:21:10,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:10,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:21:10,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:21:10,763 INFO L87 Difference]: Start difference. First operand 98 states and 198 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:10,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:10,968 INFO L93 Difference]: Finished difference Result 167 states and 320 transitions. [2021-06-12 19:21:10,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:21:10,968 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:21:10,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:10,969 INFO L225 Difference]: With dead ends: 167 [2021-06-12 19:21:10,969 INFO L226 Difference]: Without dead ends: 160 [2021-06-12 19:21:10,969 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 261.2ms TimeCoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:21:10,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-06-12 19:21:10,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 97. [2021-06-12 19:21:10,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 2.0208333333333335) internal successors, (194), 96 states have internal predecessors, (194), 0 states have call successors, (0), 0 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 19:21:10,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 194 transitions. [2021-06-12 19:21:10,976 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 194 transitions. Word has length 17 [2021-06-12 19:21:10,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:10,976 INFO L482 AbstractCegarLoop]: Abstraction has 97 states and 194 transitions. [2021-06-12 19:21:10,976 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:10,976 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 194 transitions. [2021-06-12 19:21:10,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:21:10,977 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:10,977 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:11,192 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:11,193 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:11,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:11,193 INFO L82 PathProgramCache]: Analyzing trace with hash 438078498, now seen corresponding path program 56 times [2021-06-12 19:21:11,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:11,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148372525] [2021-06-12 19:21:11,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:11,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:11,261 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:11,261 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:11,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148372525] [2021-06-12 19:21:11,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148372525] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:11,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053775719] [2021-06-12 19:21:11,262 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 19:21:11,282 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:21:11,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:11,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:21:11,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:11,404 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:11,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053775719] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:11,404 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:11,404 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-12 19:21:11,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392192022] [2021-06-12 19:21:11,404 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:21:11,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:11,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:21:11,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:21:11,405 INFO L87 Difference]: Start difference. First operand 97 states and 194 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:11,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:11,596 INFO L93 Difference]: Finished difference Result 128 states and 247 transitions. [2021-06-12 19:21:11,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:21:11,596 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:21:11,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:11,597 INFO L225 Difference]: With dead ends: 128 [2021-06-12 19:21:11,597 INFO L226 Difference]: Without dead ends: 121 [2021-06-12 19:21:11,597 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 235.6ms TimeCoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:21:11,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-06-12 19:21:11,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 97. [2021-06-12 19:21:11,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 2.0208333333333335) internal successors, (194), 96 states have internal predecessors, (194), 0 states have call successors, (0), 0 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 19:21:11,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 194 transitions. [2021-06-12 19:21:11,598 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 194 transitions. Word has length 17 [2021-06-12 19:21:11,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:11,599 INFO L482 AbstractCegarLoop]: Abstraction has 97 states and 194 transitions. [2021-06-12 19:21:11,599 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:11,599 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 194 transitions. [2021-06-12 19:21:11,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:21:11,599 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:11,599 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:11,799 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:11,799 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:11,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:11,800 INFO L82 PathProgramCache]: Analyzing trace with hash 984287384, now seen corresponding path program 57 times [2021-06-12 19:21:11,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:11,800 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907466128] [2021-06-12 19:21:11,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:11,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:11,864 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:11,864 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:11,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907466128] [2021-06-12 19:21:11,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907466128] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:11,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559057532] [2021-06-12 19:21:11,864 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 19:21:11,885 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 19:21:11,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:11,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:21:11,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:12,018 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:12,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [559057532] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:12,018 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:12,018 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-12 19:21:12,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230575654] [2021-06-12 19:21:12,018 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:21:12,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:12,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:21:12,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:21:12,019 INFO L87 Difference]: Start difference. First operand 97 states and 194 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 19:21:12,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:12,264 INFO L93 Difference]: Finished difference Result 163 states and 297 transitions. [2021-06-12 19:21:12,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:21:12,265 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17 [2021-06-12 19:21:12,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:12,265 INFO L225 Difference]: With dead ends: 163 [2021-06-12 19:21:12,265 INFO L226 Difference]: Without dead ends: 149 [2021-06-12 19:21:12,265 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 278.1ms TimeCoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:21:12,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-06-12 19:21:12,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 103. [2021-06-12 19:21:12,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.0294117647058822) internal successors, (207), 102 states have internal predecessors, (207), 0 states have call successors, (0), 0 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 19:21:12,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 207 transitions. [2021-06-12 19:21:12,267 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 207 transitions. Word has length 17 [2021-06-12 19:21:12,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:12,267 INFO L482 AbstractCegarLoop]: Abstraction has 103 states and 207 transitions. [2021-06-12 19:21:12,267 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 19:21:12,267 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 207 transitions. [2021-06-12 19:21:12,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:21:12,267 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:12,268 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:12,480 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:12,481 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:12,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:12,481 INFO L82 PathProgramCache]: Analyzing trace with hash 601566996, now seen corresponding path program 58 times [2021-06-12 19:21:12,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:12,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416197221] [2021-06-12 19:21:12,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:12,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:12,544 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:12,544 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:12,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416197221] [2021-06-12 19:21:12,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416197221] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:12,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136844907] [2021-06-12 19:21:12,544 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 19:21:12,564 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:21:12,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:12,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:21:12,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:12,704 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:12,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136844907] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:12,705 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:12,705 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-12 19:21:12,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511250709] [2021-06-12 19:21:12,705 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:21:12,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:12,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:21:12,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:21:12,705 INFO L87 Difference]: Start difference. First operand 103 states and 207 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 19:21:12,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:12,991 INFO L93 Difference]: Finished difference Result 144 states and 280 transitions. [2021-06-12 19:21:12,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:21:12,991 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17 [2021-06-12 19:21:12,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:12,992 INFO L225 Difference]: With dead ends: 144 [2021-06-12 19:21:12,992 INFO L226 Difference]: Without dead ends: 137 [2021-06-12 19:21:12,992 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 331.1ms TimeCoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:21:12,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-06-12 19:21:12,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 104. [2021-06-12 19:21:12,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.0388349514563107) internal successors, (210), 103 states have internal predecessors, (210), 0 states have call successors, (0), 0 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 19:21:12,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 210 transitions. [2021-06-12 19:21:12,994 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 210 transitions. Word has length 17 [2021-06-12 19:21:12,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:12,994 INFO L482 AbstractCegarLoop]: Abstraction has 104 states and 210 transitions. [2021-06-12 19:21:12,994 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 19:21:12,994 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 210 transitions. [2021-06-12 19:21:12,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:21:12,994 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:12,994 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:13,209 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:13,210 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:13,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:13,210 INFO L82 PathProgramCache]: Analyzing trace with hash -1614106472, now seen corresponding path program 59 times [2021-06-12 19:21:13,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:13,210 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984301114] [2021-06-12 19:21:13,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:13,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:13,279 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:13,280 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:13,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984301114] [2021-06-12 19:21:13,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984301114] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:13,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313453252] [2021-06-12 19:21:13,280 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 19:21:13,298 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 19:21:13,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:13,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:21:13,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:13,466 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:13,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313453252] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:13,467 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:13,467 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-12 19:21:13,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430885275] [2021-06-12 19:21:13,467 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:21:13,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:13,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:21:13,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:21:13,467 INFO L87 Difference]: Start difference. First operand 104 states and 210 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 19:21:13,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:13,894 INFO L93 Difference]: Finished difference Result 190 states and 368 transitions. [2021-06-12 19:21:13,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 19:21:13,894 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17 [2021-06-12 19:21:13,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:13,895 INFO L225 Difference]: With dead ends: 190 [2021-06-12 19:21:13,895 INFO L226 Difference]: Without dead ends: 183 [2021-06-12 19:21:13,895 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 410.4ms TimeCoverageRelationStatistics Valid=134, Invalid=568, Unknown=0, NotChecked=0, Total=702 [2021-06-12 19:21:13,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-06-12 19:21:13,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 105. [2021-06-12 19:21:13,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.0576923076923075) internal successors, (214), 104 states have internal predecessors, (214), 0 states have call successors, (0), 0 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 19:21:13,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 214 transitions. [2021-06-12 19:21:13,897 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 214 transitions. Word has length 17 [2021-06-12 19:21:13,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:13,897 INFO L482 AbstractCegarLoop]: Abstraction has 105 states and 214 transitions. [2021-06-12 19:21:13,897 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 19:21:13,897 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 214 transitions. [2021-06-12 19:21:13,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:21:13,897 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:13,897 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:14,098 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-06-12 19:21:14,098 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:14,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:14,098 INFO L82 PathProgramCache]: Analyzing trace with hash -1598645676, now seen corresponding path program 60 times [2021-06-12 19:21:14,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:14,098 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090524994] [2021-06-12 19:21:14,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:14,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:14,165 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:14,166 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:14,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090524994] [2021-06-12 19:21:14,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090524994] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:14,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767104434] [2021-06-12 19:21:14,166 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 19:21:14,185 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 19:21:14,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:14,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:21:14,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:14,306 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:14,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767104434] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:14,306 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:14,306 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-12 19:21:14,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263430089] [2021-06-12 19:21:14,306 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:21:14,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:14,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:21:14,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:21:14,307 INFO L87 Difference]: Start difference. First operand 105 states and 214 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 19:21:14,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:14,655 INFO L93 Difference]: Finished difference Result 178 states and 352 transitions. [2021-06-12 19:21:14,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:21:14,655 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17 [2021-06-12 19:21:14,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:14,656 INFO L225 Difference]: With dead ends: 178 [2021-06-12 19:21:14,656 INFO L226 Difference]: Without dead ends: 171 [2021-06-12 19:21:14,656 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 296.6ms TimeCoverageRelationStatistics Valid=117, Invalid=483, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:21:14,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-06-12 19:21:14,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 102. [2021-06-12 19:21:14,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 2.00990099009901) internal successors, (203), 101 states have internal predecessors, (203), 0 states have call successors, (0), 0 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 19:21:14,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 203 transitions. [2021-06-12 19:21:14,657 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 203 transitions. Word has length 17 [2021-06-12 19:21:14,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:14,657 INFO L482 AbstractCegarLoop]: Abstraction has 102 states and 203 transitions. [2021-06-12 19:21:14,657 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 19:21:14,657 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 203 transitions. [2021-06-12 19:21:14,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:21:14,658 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:14,658 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:14,858 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-06-12 19:21:14,858 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:14,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:14,858 INFO L82 PathProgramCache]: Analyzing trace with hash 1614259528, now seen corresponding path program 61 times [2021-06-12 19:21:14,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:14,859 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066150366] [2021-06-12 19:21:14,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:14,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:14,921 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:14,921 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:14,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066150366] [2021-06-12 19:21:14,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066150366] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:14,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077822305] [2021-06-12 19:21:14,921 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 19:21:14,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:14,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:21:14,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:15,091 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:15,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077822305] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:15,091 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:15,092 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-12 19:21:15,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796226450] [2021-06-12 19:21:15,092 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:21:15,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:15,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:21:15,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:21:15,092 INFO L87 Difference]: Start difference. First operand 102 states and 203 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 19:21:15,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:15,288 INFO L93 Difference]: Finished difference Result 130 states and 252 transitions. [2021-06-12 19:21:15,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:21:15,288 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17 [2021-06-12 19:21:15,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:15,288 INFO L225 Difference]: With dead ends: 130 [2021-06-12 19:21:15,288 INFO L226 Difference]: Without dead ends: 123 [2021-06-12 19:21:15,288 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 257.7ms TimeCoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:21:15,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-06-12 19:21:15,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 104. [2021-06-12 19:21:15,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.0194174757281553) internal successors, (208), 103 states have internal predecessors, (208), 0 states have call successors, (0), 0 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 19:21:15,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 208 transitions. [2021-06-12 19:21:15,291 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 208 transitions. Word has length 17 [2021-06-12 19:21:15,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:15,291 INFO L482 AbstractCegarLoop]: Abstraction has 104 states and 208 transitions. [2021-06-12 19:21:15,291 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 19:21:15,291 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 208 transitions. [2021-06-12 19:21:15,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:21:15,291 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:15,291 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:15,504 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:15,505 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:15,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:15,505 INFO L82 PathProgramCache]: Analyzing trace with hash -601413940, now seen corresponding path program 62 times [2021-06-12 19:21:15,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:15,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336874411] [2021-06-12 19:21:15,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:15,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:15,572 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:15,572 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:15,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336874411] [2021-06-12 19:21:15,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336874411] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:15,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292958449] [2021-06-12 19:21:15,573 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 19:21:15,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:21:15,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:15,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:21:15,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:15,748 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:15,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292958449] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:15,748 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:15,748 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-12 19:21:15,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948168551] [2021-06-12 19:21:15,749 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:21:15,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:15,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:21:15,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:21:15,749 INFO L87 Difference]: Start difference. First operand 104 states and 208 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 19:21:16,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:16,068 INFO L93 Difference]: Finished difference Result 174 states and 336 transitions. [2021-06-12 19:21:16,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 19:21:16,068 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17 [2021-06-12 19:21:16,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:16,069 INFO L225 Difference]: With dead ends: 174 [2021-06-12 19:21:16,069 INFO L226 Difference]: Without dead ends: 167 [2021-06-12 19:21:16,069 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 338.5ms TimeCoverageRelationStatistics Valid=122, Invalid=478, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:21:16,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-06-12 19:21:16,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 105. [2021-06-12 19:21:16,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.0384615384615383) internal successors, (212), 104 states have internal predecessors, (212), 0 states have call successors, (0), 0 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 19:21:16,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 212 transitions. [2021-06-12 19:21:16,070 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 212 transitions. Word has length 17 [2021-06-12 19:21:16,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:16,070 INFO L482 AbstractCegarLoop]: Abstraction has 105 states and 212 transitions. [2021-06-12 19:21:16,070 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 19:21:16,071 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 212 transitions. [2021-06-12 19:21:16,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:21:16,071 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:16,071 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:16,287 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-06-12 19:21:16,287 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:16,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:16,287 INFO L82 PathProgramCache]: Analyzing trace with hash -585953144, now seen corresponding path program 63 times [2021-06-12 19:21:16,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:16,287 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303871296] [2021-06-12 19:21:16,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:16,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:16,359 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:16,359 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:16,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303871296] [2021-06-12 19:21:16,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303871296] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:16,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748862984] [2021-06-12 19:21:16,360 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) [2021-06-12 19:21:16,381 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:21:16,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:16,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:21:16,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:16,531 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:16,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748862984] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:16,531 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:16,531 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-12 19:21:16,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873297797] [2021-06-12 19:21:16,531 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:21:16,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:16,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:21:16,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:21:16,532 INFO L87 Difference]: Start difference. First operand 105 states and 212 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 19:21:16,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:16,797 INFO L93 Difference]: Finished difference Result 164 states and 323 transitions. [2021-06-12 19:21:16,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:21:16,798 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17 [2021-06-12 19:21:16,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:16,798 INFO L225 Difference]: With dead ends: 164 [2021-06-12 19:21:16,798 INFO L226 Difference]: Without dead ends: 157 [2021-06-12 19:21:16,798 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 296.6ms TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:21:16,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-06-12 19:21:16,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 103. [2021-06-12 19:21:16,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.0098039215686274) internal successors, (205), 102 states have internal predecessors, (205), 0 states have call successors, (0), 0 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 19:21:16,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 205 transitions. [2021-06-12 19:21:16,800 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 205 transitions. Word has length 17 [2021-06-12 19:21:16,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:16,800 INFO L482 AbstractCegarLoop]: Abstraction has 103 states and 205 transitions. [2021-06-12 19:21:16,800 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 19:21:16,800 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 205 transitions. [2021-06-12 19:21:16,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:21:16,800 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:16,800 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:17,004 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-06-12 19:21:17,006 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:17,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:17,007 INFO L82 PathProgramCache]: Analyzing trace with hash 1544756820, now seen corresponding path program 64 times [2021-06-12 19:21:17,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:17,007 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426560321] [2021-06-12 19:21:17,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:17,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:17,075 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:17,075 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:17,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426560321] [2021-06-12 19:21:17,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426560321] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:17,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298519844] [2021-06-12 19:21:17,076 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 19:21:17,094 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:21:17,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:17,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:21:17,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:17,235 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:17,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [298519844] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:17,236 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:17,236 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-12 19:21:17,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448081689] [2021-06-12 19:21:17,236 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:21:17,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:17,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:21:17,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:21:17,236 INFO L87 Difference]: Start difference. First operand 103 states and 205 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 19:21:17,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:17,501 INFO L93 Difference]: Finished difference Result 172 states and 333 transitions. [2021-06-12 19:21:17,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:21:17,502 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17 [2021-06-12 19:21:17,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:17,502 INFO L225 Difference]: With dead ends: 172 [2021-06-12 19:21:17,502 INFO L226 Difference]: Without dead ends: 165 [2021-06-12 19:21:17,503 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 265.3ms TimeCoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:21:17,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-06-12 19:21:17,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 105. [2021-06-12 19:21:17,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.0384615384615383) internal successors, (212), 104 states have internal predecessors, (212), 0 states have call successors, (0), 0 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 19:21:17,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 212 transitions. [2021-06-12 19:21:17,504 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 212 transitions. Word has length 17 [2021-06-12 19:21:17,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:17,504 INFO L482 AbstractCegarLoop]: Abstraction has 105 states and 212 transitions. [2021-06-12 19:21:17,504 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 19:21:17,504 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 212 transitions. [2021-06-12 19:21:17,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:21:17,505 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:17,505 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:17,705 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable70 [2021-06-12 19:21:17,705 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:17,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:17,705 INFO L82 PathProgramCache]: Analyzing trace with hash 1560217616, now seen corresponding path program 65 times [2021-06-12 19:21:17,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:17,706 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579418464] [2021-06-12 19:21:17,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:17,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:17,771 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:17,771 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:17,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579418464] [2021-06-12 19:21:17,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579418464] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:17,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232810879] [2021-06-12 19:21:17,771 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 19:21:17,791 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 19:21:17,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:17,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:21:17,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:17,935 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:17,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232810879] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:17,935 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:17,936 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-12 19:21:17,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846565501] [2021-06-12 19:21:17,936 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:21:17,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:17,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:21:17,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:21:17,936 INFO L87 Difference]: Start difference. First operand 105 states and 212 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 19:21:18,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:18,162 INFO L93 Difference]: Finished difference Result 186 states and 358 transitions. [2021-06-12 19:21:18,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:21:18,162 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17 [2021-06-12 19:21:18,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:18,162 INFO L225 Difference]: With dead ends: 186 [2021-06-12 19:21:18,163 INFO L226 Difference]: Without dead ends: 179 [2021-06-12 19:21:18,163 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 275.5ms TimeCoverageRelationStatistics Valid=102, Invalid=360, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:21:18,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-06-12 19:21:18,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 104. [2021-06-12 19:21:18,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.0194174757281553) internal successors, (208), 103 states have internal predecessors, (208), 0 states have call successors, (0), 0 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 19:21:18,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 208 transitions. [2021-06-12 19:21:18,164 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 208 transitions. Word has length 17 [2021-06-12 19:21:18,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:18,164 INFO L482 AbstractCegarLoop]: Abstraction has 104 states and 208 transitions. [2021-06-12 19:21:18,164 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 19:21:18,164 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 208 transitions. [2021-06-12 19:21:18,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:21:18,165 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:18,165 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:18,372 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:18,373 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:18,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:18,373 INFO L82 PathProgramCache]: Analyzing trace with hash 2131672422, now seen corresponding path program 66 times [2021-06-12 19:21:18,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:18,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923586689] [2021-06-12 19:21:18,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:18,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:18,450 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:18,450 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:18,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923586689] [2021-06-12 19:21:18,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923586689] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:18,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646967896] [2021-06-12 19:21:18,450 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 19:21:18,469 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 19:21:18,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:18,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:21:18,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:18,625 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:18,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646967896] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:18,625 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:18,625 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-12 19:21:18,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703905528] [2021-06-12 19:21:18,625 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:21:18,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:18,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:21:18,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:21:18,625 INFO L87 Difference]: Start difference. First operand 104 states and 208 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 19:21:18,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:18,869 INFO L93 Difference]: Finished difference Result 143 states and 276 transitions. [2021-06-12 19:21:18,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:21:18,869 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17 [2021-06-12 19:21:18,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:18,870 INFO L225 Difference]: With dead ends: 143 [2021-06-12 19:21:18,870 INFO L226 Difference]: Without dead ends: 136 [2021-06-12 19:21:18,870 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 302.6ms TimeCoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:21:18,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-06-12 19:21:18,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 101. [2021-06-12 19:21:18,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 2.0) internal successors, (200), 100 states have internal predecessors, (200), 0 states have call successors, (0), 0 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 19:21:18,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 200 transitions. [2021-06-12 19:21:18,872 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 200 transitions. Word has length 17 [2021-06-12 19:21:18,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:18,872 INFO L482 AbstractCegarLoop]: Abstraction has 101 states and 200 transitions. [2021-06-12 19:21:18,872 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 19:21:18,872 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 200 transitions. [2021-06-12 19:21:18,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:21:18,872 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:18,872 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:19,084 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:19,085 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:19,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:19,085 INFO L82 PathProgramCache]: Analyzing trace with hash -1794909488, now seen corresponding path program 67 times [2021-06-12 19:21:19,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:19,085 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98058759] [2021-06-12 19:21:19,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:19,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:19,150 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:19,150 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:19,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98058759] [2021-06-12 19:21:19,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98058759] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:19,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187001868] [2021-06-12 19:21:19,150 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 19:21:19,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:19,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:21:19,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:19,312 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:19,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187001868] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:19,312 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:19,312 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-12 19:21:19,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558500406] [2021-06-12 19:21:19,312 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:21:19,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:19,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:21:19,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:21:19,313 INFO L87 Difference]: Start difference. First operand 101 states and 200 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 19:21:19,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:19,454 INFO L93 Difference]: Finished difference Result 111 states and 213 transitions. [2021-06-12 19:21:19,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:21:19,454 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17 [2021-06-12 19:21:19,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:19,454 INFO L225 Difference]: With dead ends: 111 [2021-06-12 19:21:19,454 INFO L226 Difference]: Without dead ends: 104 [2021-06-12 19:21:19,455 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 197.2ms TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:21:19,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-06-12 19:21:19,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 97. [2021-06-12 19:21:19,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 2.0) internal successors, (192), 96 states have internal predecessors, (192), 0 states have call successors, (0), 0 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 19:21:19,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 192 transitions. [2021-06-12 19:21:19,456 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 192 transitions. Word has length 17 [2021-06-12 19:21:19,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:19,456 INFO L482 AbstractCegarLoop]: Abstraction has 97 states and 192 transitions. [2021-06-12 19:21:19,456 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 19:21:19,456 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 192 transitions. [2021-06-12 19:21:19,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:21:19,456 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:19,456 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:19,671 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:19,672 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:19,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:19,672 INFO L82 PathProgramCache]: Analyzing trace with hash 284384340, now seen corresponding path program 68 times [2021-06-12 19:21:19,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:19,672 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652239618] [2021-06-12 19:21:19,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:19,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:19,741 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:19,741 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:19,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652239618] [2021-06-12 19:21:19,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652239618] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:19,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417546817] [2021-06-12 19:21:19,741 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 19:21:19,761 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:21:19,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:19,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:21:19,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:19,904 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:19,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1417546817] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:19,904 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:19,904 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-12 19:21:19,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120920129] [2021-06-12 19:21:19,905 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:21:19,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:19,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:21:19,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:21:19,905 INFO L87 Difference]: Start difference. First operand 97 states and 192 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 19:21:20,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:20,198 INFO L93 Difference]: Finished difference Result 144 states and 274 transitions. [2021-06-12 19:21:20,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:21:20,199 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17 [2021-06-12 19:21:20,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:20,199 INFO L225 Difference]: With dead ends: 144 [2021-06-12 19:21:20,199 INFO L226 Difference]: Without dead ends: 137 [2021-06-12 19:21:20,200 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 323.6ms TimeCoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:21:20,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-06-12 19:21:20,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 98. [2021-06-12 19:21:20,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.020618556701031) internal successors, (196), 97 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:20,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 196 transitions. [2021-06-12 19:21:20,201 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 196 transitions. Word has length 17 [2021-06-12 19:21:20,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:20,201 INFO L482 AbstractCegarLoop]: Abstraction has 98 states and 196 transitions. [2021-06-12 19:21:20,201 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 19:21:20,201 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 196 transitions. [2021-06-12 19:21:20,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:21:20,201 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:20,201 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:20,418 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2021-06-12 19:21:20,418 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:20,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:20,418 INFO L82 PathProgramCache]: Analyzing trace with hash 299845136, now seen corresponding path program 69 times [2021-06-12 19:21:20,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:20,418 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307548945] [2021-06-12 19:21:20,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:20,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:20,491 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:20,491 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:20,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307548945] [2021-06-12 19:21:20,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307548945] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:20,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773542836] [2021-06-12 19:21:20,491 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 19:21:20,510 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:21:20,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:20,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:21:20,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:20,655 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:20,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773542836] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:20,655 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:20,656 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-12 19:21:20,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403768821] [2021-06-12 19:21:20,656 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:21:20,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:20,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:21:20,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:21:20,656 INFO L87 Difference]: Start difference. First operand 98 states and 196 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 19:21:20,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:20,876 INFO L93 Difference]: Finished difference Result 139 states and 270 transitions. [2021-06-12 19:21:20,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:21:20,876 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17 [2021-06-12 19:21:20,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:20,877 INFO L225 Difference]: With dead ends: 139 [2021-06-12 19:21:20,877 INFO L226 Difference]: Without dead ends: 132 [2021-06-12 19:21:20,877 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 257.7ms TimeCoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:21:20,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-06-12 19:21:20,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 96. [2021-06-12 19:21:20,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.9894736842105263) internal successors, (189), 95 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 19:21:20,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 189 transitions. [2021-06-12 19:21:20,893 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 189 transitions. Word has length 17 [2021-06-12 19:21:20,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:20,893 INFO L482 AbstractCegarLoop]: Abstraction has 96 states and 189 transitions. [2021-06-12 19:21:20,893 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 19:21:20,893 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 189 transitions. [2021-06-12 19:21:20,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:21:20,894 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:20,894 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:21,102 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:21,102 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:21,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:21,103 INFO L82 PathProgramCache]: Analyzing trace with hash -1864412196, now seen corresponding path program 70 times [2021-06-12 19:21:21,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:21,103 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348590013] [2021-06-12 19:21:21,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:21,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:21,170 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:21,170 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:21,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348590013] [2021-06-12 19:21:21,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348590013] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:21,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147473170] [2021-06-12 19:21:21,170 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 19:21:21,190 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:21:21,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:21,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:21:21,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:21,327 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:21,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147473170] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:21,328 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:21,328 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-12 19:21:21,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927366622] [2021-06-12 19:21:21,328 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:21:21,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:21,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:21:21,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:21:21,328 INFO L87 Difference]: Start difference. First operand 96 states and 189 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 19:21:21,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:21,565 INFO L93 Difference]: Finished difference Result 140 states and 268 transitions. [2021-06-12 19:21:21,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:21:21,565 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17 [2021-06-12 19:21:21,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:21,566 INFO L225 Difference]: With dead ends: 140 [2021-06-12 19:21:21,566 INFO L226 Difference]: Without dead ends: 133 [2021-06-12 19:21:21,566 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 268.5ms TimeCoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:21:21,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-06-12 19:21:21,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 98. [2021-06-12 19:21:21,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.020618556701031) internal successors, (196), 97 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:21,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 196 transitions. [2021-06-12 19:21:21,567 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 196 transitions. Word has length 17 [2021-06-12 19:21:21,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:21,567 INFO L482 AbstractCegarLoop]: Abstraction has 98 states and 196 transitions. [2021-06-12 19:21:21,567 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 19:21:21,567 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 196 transitions. [2021-06-12 19:21:21,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:21:21,568 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:21,568 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:21,768 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:21,768 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:21,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:21,768 INFO L82 PathProgramCache]: Analyzing trace with hash -1848951400, now seen corresponding path program 71 times [2021-06-12 19:21:21,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:21,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440753319] [2021-06-12 19:21:21,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:21,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:21,842 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:21,842 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:21,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440753319] [2021-06-12 19:21:21,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440753319] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:21,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205032240] [2021-06-12 19:21:21,842 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 19:21:21,862 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 19:21:21,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:21,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:21:21,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:21,988 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:21,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205032240] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:21,988 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:21,989 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-12 19:21:21,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965271096] [2021-06-12 19:21:21,989 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:21:21,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:21,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:21:21,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:21:21,989 INFO L87 Difference]: Start difference. First operand 98 states and 196 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 19:21:22,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:22,189 INFO L93 Difference]: Finished difference Result 151 states and 289 transitions. [2021-06-12 19:21:22,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:21:22,189 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17 [2021-06-12 19:21:22,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:22,190 INFO L225 Difference]: With dead ends: 151 [2021-06-12 19:21:22,190 INFO L226 Difference]: Without dead ends: 144 [2021-06-12 19:21:22,190 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 244.1ms TimeCoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:21:22,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-06-12 19:21:22,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 97. [2021-06-12 19:21:22,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 2.0) internal successors, (192), 96 states have internal predecessors, (192), 0 states have call successors, (0), 0 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 19:21:22,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 192 transitions. [2021-06-12 19:21:22,191 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 192 transitions. Word has length 17 [2021-06-12 19:21:22,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:22,191 INFO L482 AbstractCegarLoop]: Abstraction has 97 states and 192 transitions. [2021-06-12 19:21:22,191 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 19:21:22,191 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 192 transitions. [2021-06-12 19:21:22,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:21:22,192 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:22,192 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:22,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-06-12 19:21:22,401 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:22,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:22,401 INFO L82 PathProgramCache]: Analyzing trace with hash -1277496594, now seen corresponding path program 72 times [2021-06-12 19:21:22,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:22,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104485633] [2021-06-12 19:21:22,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:22,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:22,472 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:22,473 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:22,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104485633] [2021-06-12 19:21:22,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104485633] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:22,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398601222] [2021-06-12 19:21:22,473 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) [2021-06-12 19:21:22,511 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 19:21:22,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:22,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:21:22,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:22,668 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:22,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398601222] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:22,668 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:22,668 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-12 19:21:22,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101843311] [2021-06-12 19:21:22,668 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:21:22,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:22,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:21:22,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:21:22,669 INFO L87 Difference]: Start difference. First operand 97 states and 192 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 19:21:22,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:22,848 INFO L93 Difference]: Finished difference Result 124 states and 240 transitions. [2021-06-12 19:21:22,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:21:22,848 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17 [2021-06-12 19:21:22,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:22,849 INFO L225 Difference]: With dead ends: 124 [2021-06-12 19:21:22,849 INFO L226 Difference]: Without dead ends: 117 [2021-06-12 19:21:22,849 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 259.0ms TimeCoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:21:22,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-06-12 19:21:22,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 95. [2021-06-12 19:21:22,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 1.9893617021276595) internal successors, (187), 94 states have internal predecessors, (187), 0 states have call successors, (0), 0 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 19:21:22,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 187 transitions. [2021-06-12 19:21:22,850 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 187 transitions. Word has length 17 [2021-06-12 19:21:22,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:22,850 INFO L482 AbstractCegarLoop]: Abstraction has 95 states and 187 transitions. [2021-06-12 19:21:22,850 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 19:21:22,850 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 187 transitions. [2021-06-12 19:21:22,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:21:22,851 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:22,851 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:23,051 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-06-12 19:21:23,051 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:23,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:23,051 INFO L82 PathProgramCache]: Analyzing trace with hash 1336463512, now seen corresponding path program 73 times [2021-06-12 19:21:23,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:23,051 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573530680] [2021-06-12 19:21:23,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:23,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:23,119 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:23,119 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:23,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573530680] [2021-06-12 19:21:23,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573530680] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:23,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487477867] [2021-06-12 19:21:23,119 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 19:21:23,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:23,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:21:23,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:23,280 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:23,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487477867] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:23,280 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:23,280 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-12 19:21:23,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456671825] [2021-06-12 19:21:23,281 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:21:23,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:23,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:21:23,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:21:23,281 INFO L87 Difference]: Start difference. First operand 95 states and 187 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 19:21:23,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:23,528 INFO L93 Difference]: Finished difference Result 157 states and 300 transitions. [2021-06-12 19:21:23,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:21:23,528 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17 [2021-06-12 19:21:23,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:23,528 INFO L225 Difference]: With dead ends: 157 [2021-06-12 19:21:23,529 INFO L226 Difference]: Without dead ends: 150 [2021-06-12 19:21:23,529 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 293.5ms TimeCoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:21:23,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-06-12 19:21:23,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 97. [2021-06-12 19:21:23,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 2.0208333333333335) internal successors, (194), 96 states have internal predecessors, (194), 0 states have call successors, (0), 0 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 19:21:23,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 194 transitions. [2021-06-12 19:21:23,530 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 194 transitions. Word has length 17 [2021-06-12 19:21:23,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:23,530 INFO L482 AbstractCegarLoop]: Abstraction has 97 states and 194 transitions. [2021-06-12 19:21:23,530 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 19:21:23,530 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 194 transitions. [2021-06-12 19:21:23,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:21:23,530 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:23,530 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:23,731 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:23,731 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:23,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:23,731 INFO L82 PathProgramCache]: Analyzing trace with hash 1351924308, now seen corresponding path program 74 times [2021-06-12 19:21:23,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:23,731 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135397640] [2021-06-12 19:21:23,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:23,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:23,799 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:23,799 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:23,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135397640] [2021-06-12 19:21:23,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135397640] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:23,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913506164] [2021-06-12 19:21:23,799 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 19:21:23,818 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:21:23,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:23,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:21:23,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:23,963 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:23,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913506164] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:23,964 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:23,964 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-12 19:21:23,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149007552] [2021-06-12 19:21:23,964 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:21:23,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:23,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:21:23,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:21:23,965 INFO L87 Difference]: Start difference. First operand 97 states and 194 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 19:21:24,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:24,276 INFO L93 Difference]: Finished difference Result 169 states and 323 transitions. [2021-06-12 19:21:24,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:21:24,276 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17 [2021-06-12 19:21:24,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:24,277 INFO L225 Difference]: With dead ends: 169 [2021-06-12 19:21:24,277 INFO L226 Difference]: Without dead ends: 162 [2021-06-12 19:21:24,277 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 303.4ms TimeCoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:21:24,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-06-12 19:21:24,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 96. [2021-06-12 19:21:24,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 2.0) internal successors, (190), 95 states have internal predecessors, (190), 0 states have call successors, (0), 0 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 19:21:24,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 190 transitions. [2021-06-12 19:21:24,278 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 190 transitions. Word has length 17 [2021-06-12 19:21:24,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:24,278 INFO L482 AbstractCegarLoop]: Abstraction has 96 states and 190 transitions. [2021-06-12 19:21:24,278 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 19:21:24,278 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 190 transitions. [2021-06-12 19:21:24,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:21:24,279 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:24,279 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:24,479 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:24,479 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:24,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:24,479 INFO L82 PathProgramCache]: Analyzing trace with hash 1923379114, now seen corresponding path program 75 times [2021-06-12 19:21:24,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:24,480 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924291766] [2021-06-12 19:21:24,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:24,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:24,542 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:24,542 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:24,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924291766] [2021-06-12 19:21:24,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924291766] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:24,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830269667] [2021-06-12 19:21:24,543 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 19:21:24,562 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:21:24,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:24,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:21:24,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:24,697 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:24,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1830269667] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:24,697 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:24,697 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-12 19:21:24,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299998887] [2021-06-12 19:21:24,698 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:21:24,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:24,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:21:24,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:21:24,698 INFO L87 Difference]: Start difference. First operand 96 states and 190 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 19:21:24,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:24,977 INFO L93 Difference]: Finished difference Result 141 states and 270 transitions. [2021-06-12 19:21:24,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:21:24,978 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17 [2021-06-12 19:21:24,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:24,978 INFO L225 Difference]: With dead ends: 141 [2021-06-12 19:21:24,978 INFO L226 Difference]: Without dead ends: 134 [2021-06-12 19:21:24,978 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 299.6ms TimeCoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:21:24,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-06-12 19:21:24,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 95. [2021-06-12 19:21:24,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 1.9893617021276595) internal successors, (187), 94 states have internal predecessors, (187), 0 states have call successors, (0), 0 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 19:21:24,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 187 transitions. [2021-06-12 19:21:24,980 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 187 transitions. Word has length 17 [2021-06-12 19:21:24,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:24,980 INFO L482 AbstractCegarLoop]: Abstraction has 95 states and 187 transitions. [2021-06-12 19:21:24,980 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 19:21:24,980 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 187 transitions. [2021-06-12 19:21:24,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:21:24,980 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:24,980 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:25,180 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:25,180 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:25,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:25,181 INFO L82 PathProgramCache]: Analyzing trace with hash 762400792, now seen corresponding path program 4 times [2021-06-12 19:21:25,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:25,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405577800] [2021-06-12 19:21:25,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:25,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:25,249 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:25,249 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:25,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405577800] [2021-06-12 19:21:25,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405577800] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:25,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275731385] [2021-06-12 19:21:25,249 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 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:25,268 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:21:25,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:25,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 19:21:25,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:25,333 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:25,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275731385] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:25,333 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:25,333 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-06-12 19:21:25,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843831324] [2021-06-12 19:21:25,333 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:21:25,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:25,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:21:25,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:21:25,334 INFO L87 Difference]: Start difference. First operand 95 states and 187 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:25,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:25,472 INFO L93 Difference]: Finished difference Result 130 states and 253 transitions. [2021-06-12 19:21:25,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-12 19:21:25,473 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:21:25,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:25,473 INFO L225 Difference]: With dead ends: 130 [2021-06-12 19:21:25,473 INFO L226 Difference]: Without dead ends: 119 [2021-06-12 19:21:25,473 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 184.3ms TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:21:25,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-06-12 19:21:25,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 99. [2021-06-12 19:21:25,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 2.010204081632653) internal successors, (197), 98 states have internal predecessors, (197), 0 states have call successors, (0), 0 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 19:21:25,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 197 transitions. [2021-06-12 19:21:25,475 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 197 transitions. Word has length 17 [2021-06-12 19:21:25,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:25,475 INFO L482 AbstractCegarLoop]: Abstraction has 99 states and 197 transitions. [2021-06-12 19:21:25,475 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:25,475 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 197 transitions. [2021-06-12 19:21:25,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:21:25,475 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:25,475 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:25,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:25,681 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:25,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:25,681 INFO L82 PathProgramCache]: Analyzing trace with hash 1385523536, now seen corresponding path program 76 times [2021-06-12 19:21:25,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:25,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145118907] [2021-06-12 19:21:25,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:25,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:25,756 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:25,756 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:25,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145118907] [2021-06-12 19:21:25,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145118907] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:25,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357744847] [2021-06-12 19:21:25,756 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 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:25,776 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:21:25,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:25,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:21:25,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:25,916 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:25,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357744847] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:25,917 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:25,917 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-12 19:21:25,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885383501] [2021-06-12 19:21:25,917 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:21:25,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:25,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:21:25,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:21:25,917 INFO L87 Difference]: Start difference. First operand 99 states and 197 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 19:21:26,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:26,272 INFO L93 Difference]: Finished difference Result 153 states and 289 transitions. [2021-06-12 19:21:26,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:21:26,272 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17 [2021-06-12 19:21:26,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:26,272 INFO L225 Difference]: With dead ends: 153 [2021-06-12 19:21:26,272 INFO L226 Difference]: Without dead ends: 139 [2021-06-12 19:21:26,273 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 357.2ms TimeCoverageRelationStatistics Valid=133, Invalid=623, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:21:26,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-06-12 19:21:26,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 100. [2021-06-12 19:21:26,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.9898989898989898) internal successors, (197), 99 states have internal predecessors, (197), 0 states have call successors, (0), 0 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 19:21:26,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 197 transitions. [2021-06-12 19:21:26,274 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 197 transitions. Word has length 17 [2021-06-12 19:21:26,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:26,274 INFO L482 AbstractCegarLoop]: Abstraction has 100 states and 197 transitions. [2021-06-12 19:21:26,274 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 19:21:26,274 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 197 transitions. [2021-06-12 19:21:26,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:21:26,274 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:26,275 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:26,489 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:26,489 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:26,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:26,489 INFO L82 PathProgramCache]: Analyzing trace with hash 255431194, now seen corresponding path program 4 times [2021-06-12 19:21:26,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:26,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054063521] [2021-06-12 19:21:26,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:26,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:26,564 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:26,565 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:26,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054063521] [2021-06-12 19:21:26,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054063521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:26,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905515747] [2021-06-12 19:21:26,565 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 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:26,585 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:21:26,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:26,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:21:26,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:26,666 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:26,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905515747] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:26,666 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:26,666 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-12 19:21:26,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523034088] [2021-06-12 19:21:26,667 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:21:26,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:26,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:21:26,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:21:26,667 INFO L87 Difference]: Start difference. First operand 100 states and 197 transitions. Second operand has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:26,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:26,859 INFO L93 Difference]: Finished difference Result 132 states and 257 transitions. [2021-06-12 19:21:26,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 19:21:26,860 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 19:21:26,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:26,860 INFO L225 Difference]: With dead ends: 132 [2021-06-12 19:21:26,860 INFO L226 Difference]: Without dead ends: 119 [2021-06-12 19:21:26,860 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 240.5ms TimeCoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:21:26,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-06-12 19:21:26,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 102. [2021-06-12 19:21:26,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 2.0) internal successors, (202), 101 states have internal predecessors, (202), 0 states have call successors, (0), 0 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 19:21:26,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 202 transitions. [2021-06-12 19:21:26,861 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 202 transitions. Word has length 19 [2021-06-12 19:21:26,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:26,862 INFO L482 AbstractCegarLoop]: Abstraction has 102 states and 202 transitions. [2021-06-12 19:21:26,862 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:26,862 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 202 transitions. [2021-06-12 19:21:26,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:21:26,862 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:26,862 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:27,076 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2021-06-12 19:21:27,077 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:27,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:27,077 INFO L82 PathProgramCache]: Analyzing trace with hash -2015204966, now seen corresponding path program 77 times [2021-06-12 19:21:27,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:27,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210658686] [2021-06-12 19:21:27,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:27,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:27,166 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:27,166 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:27,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210658686] [2021-06-12 19:21:27,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210658686] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:27,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311980611] [2021-06-12 19:21:27,166 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 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:27,187 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:21:27,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:27,188 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 19:21:27,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:27,351 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:27,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311980611] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:27,351 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:27,351 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 19:21:27,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460606603] [2021-06-12 19:21:27,351 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:21:27,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:27,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:21:27,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:21:27,352 INFO L87 Difference]: Start difference. First operand 102 states and 202 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:21:27,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:27,634 INFO L93 Difference]: Finished difference Result 136 states and 260 transitions. [2021-06-12 19:21:27,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:21:27,634 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-12 19:21:27,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:27,635 INFO L225 Difference]: With dead ends: 136 [2021-06-12 19:21:27,635 INFO L226 Difference]: Without dead ends: 129 [2021-06-12 19:21:27,635 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 339.9ms TimeCoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2021-06-12 19:21:27,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-06-12 19:21:27,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 102. [2021-06-12 19:21:27,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 2.0) internal successors, (202), 101 states have internal predecessors, (202), 0 states have call successors, (0), 0 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 19:21:27,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 202 transitions. [2021-06-12 19:21:27,636 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 202 transitions. Word has length 19 [2021-06-12 19:21:27,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:27,636 INFO L482 AbstractCegarLoop]: Abstraction has 102 states and 202 transitions. [2021-06-12 19:21:27,636 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:21:27,637 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 202 transitions. [2021-06-12 19:21:27,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:21:27,637 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:27,637 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:27,837 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:27,837 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:27,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:27,838 INFO L82 PathProgramCache]: Analyzing trace with hash 1897041942, now seen corresponding path program 78 times [2021-06-12 19:21:27,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:27,838 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113169922] [2021-06-12 19:21:27,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:27,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:27,928 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:27,928 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:27,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113169922] [2021-06-12 19:21:27,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113169922] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:27,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304725824] [2021-06-12 19:21:27,929 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 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:27,949 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:21:27,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:27,950 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 19:21:27,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:28,114 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:28,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304725824] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:28,115 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:28,115 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 19:21:28,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527137917] [2021-06-12 19:21:28,115 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:21:28,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:28,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:21:28,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:21:28,115 INFO L87 Difference]: Start difference. First operand 102 states and 202 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:21:28,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:28,402 INFO L93 Difference]: Finished difference Result 141 states and 270 transitions. [2021-06-12 19:21:28,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:21:28,403 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-12 19:21:28,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:28,403 INFO L225 Difference]: With dead ends: 141 [2021-06-12 19:21:28,403 INFO L226 Difference]: Without dead ends: 134 [2021-06-12 19:21:28,403 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 330.9ms TimeCoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:21:28,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-06-12 19:21:28,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 104. [2021-06-12 19:21:28,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.0097087378640777) internal successors, (207), 103 states have internal predecessors, (207), 0 states have call successors, (0), 0 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 19:21:28,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 207 transitions. [2021-06-12 19:21:28,405 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 207 transitions. Word has length 19 [2021-06-12 19:21:28,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:28,405 INFO L482 AbstractCegarLoop]: Abstraction has 104 states and 207 transitions. [2021-06-12 19:21:28,405 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:21:28,405 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 207 transitions. [2021-06-12 19:21:28,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:21:28,405 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:28,405 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:28,609 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2021-06-12 19:21:28,609 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:28,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:28,609 INFO L82 PathProgramCache]: Analyzing trace with hash -318631526, now seen corresponding path program 79 times [2021-06-12 19:21:28,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:28,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032172161] [2021-06-12 19:21:28,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:28,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:28,694 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:28,694 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:28,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032172161] [2021-06-12 19:21:28,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032172161] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:28,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243770128] [2021-06-12 19:21:28,694 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 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:28,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:28,714 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 19:21:28,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:28,866 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:28,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243770128] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:28,867 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:28,867 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 19:21:28,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095432936] [2021-06-12 19:21:28,867 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:21:28,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:28,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:21:28,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:21:28,867 INFO L87 Difference]: Start difference. First operand 104 states and 207 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:21:29,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:29,170 INFO L93 Difference]: Finished difference Result 167 states and 318 transitions. [2021-06-12 19:21:29,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:21:29,170 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-12 19:21:29,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:29,170 INFO L225 Difference]: With dead ends: 167 [2021-06-12 19:21:29,170 INFO L226 Difference]: Without dead ends: 160 [2021-06-12 19:21:29,171 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 335.2ms TimeCoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:21:29,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-06-12 19:21:29,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 105. [2021-06-12 19:21:29,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.0288461538461537) internal successors, (211), 104 states have internal predecessors, (211), 0 states have call successors, (0), 0 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 19:21:29,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 211 transitions. [2021-06-12 19:21:29,173 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 211 transitions. Word has length 19 [2021-06-12 19:21:29,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:29,173 INFO L482 AbstractCegarLoop]: Abstraction has 105 states and 211 transitions. [2021-06-12 19:21:29,173 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:21:29,173 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 211 transitions. [2021-06-12 19:21:29,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:21:29,174 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:29,174 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:29,388 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-06-12 19:21:29,389 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:29,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:29,389 INFO L82 PathProgramCache]: Analyzing trace with hash -303170730, now seen corresponding path program 80 times [2021-06-12 19:21:29,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:29,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587705759] [2021-06-12 19:21:29,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:29,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:29,479 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:29,479 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:29,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587705759] [2021-06-12 19:21:29,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587705759] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:29,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396639605] [2021-06-12 19:21:29,479 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:29,498 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:21:29,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:29,499 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 19:21:29,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:29,680 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:29,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396639605] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:29,680 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:29,680 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 19:21:29,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929926539] [2021-06-12 19:21:29,680 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:21:29,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:29,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:21:29,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:21:29,681 INFO L87 Difference]: Start difference. First operand 105 states and 211 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:21:30,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:30,050 INFO L93 Difference]: Finished difference Result 150 states and 292 transitions. [2021-06-12 19:21:30,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:21:30,050 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-12 19:21:30,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:30,051 INFO L225 Difference]: With dead ends: 150 [2021-06-12 19:21:30,051 INFO L226 Difference]: Without dead ends: 143 [2021-06-12 19:21:30,051 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 374.7ms TimeCoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:21:30,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-06-12 19:21:30,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 103. [2021-06-12 19:21:30,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.0) internal successors, (204), 102 states have internal predecessors, (204), 0 states have call successors, (0), 0 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 19:21:30,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 204 transitions. [2021-06-12 19:21:30,052 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 204 transitions. Word has length 19 [2021-06-12 19:21:30,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:30,052 INFO L482 AbstractCegarLoop]: Abstraction has 103 states and 204 transitions. [2021-06-12 19:21:30,052 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:21:30,053 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 204 transitions. [2021-06-12 19:21:30,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:21:30,053 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:30,053 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:30,253 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:30,253 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:30,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:30,253 INFO L82 PathProgramCache]: Analyzing trace with hash -1454735530, now seen corresponding path program 81 times [2021-06-12 19:21:30,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:30,254 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762553280] [2021-06-12 19:21:30,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:30,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:30,337 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:30,337 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:30,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762553280] [2021-06-12 19:21:30,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762553280] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:30,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915436914] [2021-06-12 19:21:30,337 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:30,358 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 19:21:30,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:30,358 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 19:21:30,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:30,522 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:30,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915436914] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:30,523 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:30,523 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 19:21:30,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903816392] [2021-06-12 19:21:30,523 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:21:30,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:30,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:21:30,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:21:30,523 INFO L87 Difference]: Start difference. First operand 103 states and 204 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:21:30,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:30,814 INFO L93 Difference]: Finished difference Result 158 states and 304 transitions. [2021-06-12 19:21:30,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:21:30,814 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-12 19:21:30,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:30,815 INFO L225 Difference]: With dead ends: 158 [2021-06-12 19:21:30,815 INFO L226 Difference]: Without dead ends: 151 [2021-06-12 19:21:30,815 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 322.5ms TimeCoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:21:30,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-06-12 19:21:30,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 105. [2021-06-12 19:21:30,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.0288461538461537) internal successors, (211), 104 states have internal predecessors, (211), 0 states have call successors, (0), 0 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 19:21:30,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 211 transitions. [2021-06-12 19:21:30,816 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 211 transitions. Word has length 19 [2021-06-12 19:21:30,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:30,817 INFO L482 AbstractCegarLoop]: Abstraction has 105 states and 211 transitions. [2021-06-12 19:21:30,817 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:21:30,817 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 211 transitions. [2021-06-12 19:21:30,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:21:30,817 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:30,817 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:31,017 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:31,017 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:31,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:31,018 INFO L82 PathProgramCache]: Analyzing trace with hash -1439274734, now seen corresponding path program 82 times [2021-06-12 19:21:31,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:31,018 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057023376] [2021-06-12 19:21:31,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:31,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:31,102 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:31,102 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:31,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057023376] [2021-06-12 19:21:31,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057023376] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:31,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761547242] [2021-06-12 19:21:31,102 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:31,121 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:21:31,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:31,122 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 19:21:31,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:31,282 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:31,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761547242] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:31,282 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:31,282 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 19:21:31,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468523819] [2021-06-12 19:21:31,282 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:21:31,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:31,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:21:31,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:21:31,283 INFO L87 Difference]: Start difference. First operand 105 states and 211 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:21:31,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:31,586 INFO L93 Difference]: Finished difference Result 160 states and 307 transitions. [2021-06-12 19:21:31,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:21:31,586 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-12 19:21:31,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:31,587 INFO L225 Difference]: With dead ends: 160 [2021-06-12 19:21:31,587 INFO L226 Difference]: Without dead ends: 153 [2021-06-12 19:21:31,587 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 333.6ms TimeCoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:21:31,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-06-12 19:21:31,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 104. [2021-06-12 19:21:31,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.0097087378640777) internal successors, (207), 103 states have internal predecessors, (207), 0 states have call successors, (0), 0 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 19:21:31,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 207 transitions. [2021-06-12 19:21:31,589 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 207 transitions. Word has length 19 [2021-06-12 19:21:31,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:31,589 INFO L482 AbstractCegarLoop]: Abstraction has 104 states and 207 transitions. [2021-06-12 19:21:31,589 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:21:31,589 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 207 transitions. [2021-06-12 19:21:31,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:21:31,589 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:31,589 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:31,789 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:31,790 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:31,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:31,790 INFO L82 PathProgramCache]: Analyzing trace with hash -867819928, now seen corresponding path program 83 times [2021-06-12 19:21:31,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:31,790 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386977268] [2021-06-12 19:21:31,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:31,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:31,867 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:31,867 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:31,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386977268] [2021-06-12 19:21:31,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386977268] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:31,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060909594] [2021-06-12 19:21:31,867 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-12 19:21:31,896 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:21:31,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:31,897 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 19:21:31,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:32,085 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:32,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2060909594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:32,085 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:32,085 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 19:21:32,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013322359] [2021-06-12 19:21:32,085 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:21:32,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:32,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:21:32,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:21:32,086 INFO L87 Difference]: Start difference. First operand 104 states and 207 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:21:32,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:32,285 INFO L93 Difference]: Finished difference Result 127 states and 246 transitions. [2021-06-12 19:21:32,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:21:32,286 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-12 19:21:32,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:32,286 INFO L225 Difference]: With dead ends: 127 [2021-06-12 19:21:32,286 INFO L226 Difference]: Without dead ends: 120 [2021-06-12 19:21:32,286 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 258.2ms TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:21:32,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-06-12 19:21:32,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 104. [2021-06-12 19:21:32,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.0097087378640777) internal successors, (207), 103 states have internal predecessors, (207), 0 states have call successors, (0), 0 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 19:21:32,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 207 transitions. [2021-06-12 19:21:32,288 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 207 transitions. Word has length 19 [2021-06-12 19:21:32,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:32,288 INFO L482 AbstractCegarLoop]: Abstraction has 104 states and 207 transitions. [2021-06-12 19:21:32,288 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:21:32,288 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 207 transitions. [2021-06-12 19:21:32,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:21:32,288 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:32,288 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:32,500 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,92 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:32,501 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:32,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:32,501 INFO L82 PathProgramCache]: Analyzing trace with hash 2041798938, now seen corresponding path program 84 times [2021-06-12 19:21:32,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:32,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954164657] [2021-06-12 19:21:32,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:32,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:32,587 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:32,587 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:32,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954164657] [2021-06-12 19:21:32,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954164657] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:32,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623146220] [2021-06-12 19:21:32,587 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:32,609 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 19:21:32,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:32,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:21:32,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:32,825 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:32,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623146220] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:32,826 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:32,826 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 19:21:32,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787770904] [2021-06-12 19:21:32,826 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:21:32,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:32,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:21:32,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:21:32,826 INFO L87 Difference]: Start difference. First operand 104 states and 207 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:21:32,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:32,992 INFO L93 Difference]: Finished difference Result 125 states and 240 transitions. [2021-06-12 19:21:32,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:21:32,992 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-12 19:21:32,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:32,993 INFO L225 Difference]: With dead ends: 125 [2021-06-12 19:21:32,993 INFO L226 Difference]: Without dead ends: 118 [2021-06-12 19:21:32,993 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 259.0ms TimeCoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:21:32,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-06-12 19:21:32,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 103. [2021-06-12 19:21:32,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.0098039215686274) internal successors, (205), 102 states have internal predecessors, (205), 0 states have call successors, (0), 0 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 19:21:32,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 205 transitions. [2021-06-12 19:21:32,994 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 205 transitions. Word has length 19 [2021-06-12 19:21:32,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:32,994 INFO L482 AbstractCegarLoop]: Abstraction has 103 states and 205 transitions. [2021-06-12 19:21:32,994 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:21:32,994 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 205 transitions. [2021-06-12 19:21:32,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:21:32,994 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:32,994 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:33,195 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:33,195 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:33,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:33,195 INFO L82 PathProgramCache]: Analyzing trace with hash -499434542, now seen corresponding path program 85 times [2021-06-12 19:21:33,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:33,195 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372218089] [2021-06-12 19:21:33,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:33,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:33,276 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:33,276 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:33,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372218089] [2021-06-12 19:21:33,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372218089] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:33,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023470468] [2021-06-12 19:21:33,276 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:33,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:33,296 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 19:21:33,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:33,494 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:33,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023470468] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:33,495 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:33,495 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 19:21:33,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964040554] [2021-06-12 19:21:33,495 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:21:33,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:33,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:21:33,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:21:33,495 INFO L87 Difference]: Start difference. First operand 103 states and 205 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:21:33,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:33,839 INFO L93 Difference]: Finished difference Result 137 states and 265 transitions. [2021-06-12 19:21:33,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:21:33,839 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-12 19:21:33,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:33,840 INFO L225 Difference]: With dead ends: 137 [2021-06-12 19:21:33,840 INFO L226 Difference]: Without dead ends: 130 [2021-06-12 19:21:33,840 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 378.9ms TimeCoverageRelationStatistics Valid=129, Invalid=627, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:21:33,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-06-12 19:21:33,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 107. [2021-06-12 19:21:33,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 2.0283018867924527) internal successors, (215), 106 states have internal predecessors, (215), 0 states have call successors, (0), 0 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 19:21:33,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 215 transitions. [2021-06-12 19:21:33,841 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 215 transitions. Word has length 19 [2021-06-12 19:21:33,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:33,841 INFO L482 AbstractCegarLoop]: Abstraction has 107 states and 215 transitions. [2021-06-12 19:21:33,841 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:21:33,841 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 215 transitions. [2021-06-12 19:21:33,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:21:33,842 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:33,842 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:34,056 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,94 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:34,058 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:34,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:34,059 INFO L82 PathProgramCache]: Analyzing trace with hash 1579859286, now seen corresponding path program 86 times [2021-06-12 19:21:34,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:34,059 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881862806] [2021-06-12 19:21:34,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:34,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:34,142 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:34,143 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:34,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881862806] [2021-06-12 19:21:34,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881862806] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:34,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431593194] [2021-06-12 19:21:34,143 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 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:34,162 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:21:34,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:34,163 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 19:21:34,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:34,332 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:34,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431593194] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:34,332 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:34,332 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 19:21:34,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763378968] [2021-06-12 19:21:34,332 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:21:34,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:34,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:21:34,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:21:34,333 INFO L87 Difference]: Start difference. First operand 107 states and 215 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:21:34,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:34,702 INFO L93 Difference]: Finished difference Result 192 states and 369 transitions. [2021-06-12 19:21:34,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:21:34,702 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-12 19:21:34,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:34,703 INFO L225 Difference]: With dead ends: 192 [2021-06-12 19:21:34,703 INFO L226 Difference]: Without dead ends: 185 [2021-06-12 19:21:34,703 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 395.8ms TimeCoverageRelationStatistics Valid=134, Invalid=568, Unknown=0, NotChecked=0, Total=702 [2021-06-12 19:21:34,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-06-12 19:21:34,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 108. [2021-06-12 19:21:34,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.046728971962617) internal successors, (219), 107 states have internal predecessors, (219), 0 states have call successors, (0), 0 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 19:21:34,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 219 transitions. [2021-06-12 19:21:34,704 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 219 transitions. Word has length 19 [2021-06-12 19:21:34,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:34,705 INFO L482 AbstractCegarLoop]: Abstraction has 108 states and 219 transitions. [2021-06-12 19:21:34,705 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:21:34,705 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 219 transitions. [2021-06-12 19:21:34,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:21:34,705 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:34,705 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:34,920 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:34,920 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:34,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:34,920 INFO L82 PathProgramCache]: Analyzing trace with hash 1595320082, now seen corresponding path program 87 times [2021-06-12 19:21:34,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:34,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966348900] [2021-06-12 19:21:34,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:34,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:35,002 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:35,003 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:35,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966348900] [2021-06-12 19:21:35,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966348900] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:35,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991802000] [2021-06-12 19:21:35,003 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 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:35,034 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 19:21:35,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:35,035 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 19:21:35,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:35,211 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:35,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991802000] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:35,211 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:35,211 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 19:21:35,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902499065] [2021-06-12 19:21:35,212 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:21:35,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:35,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:21:35,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:21:35,212 INFO L87 Difference]: Start difference. First operand 108 states and 219 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:21:35,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:35,662 INFO L93 Difference]: Finished difference Result 176 states and 346 transitions. [2021-06-12 19:21:35,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:21:35,663 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-12 19:21:35,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:35,663 INFO L225 Difference]: With dead ends: 176 [2021-06-12 19:21:35,663 INFO L226 Difference]: Without dead ends: 169 [2021-06-12 19:21:35,663 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 407.6ms TimeCoverageRelationStatistics Valid=127, Invalid=575, Unknown=0, NotChecked=0, Total=702 [2021-06-12 19:21:35,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-06-12 19:21:35,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 106. [2021-06-12 19:21:35,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.019047619047619) internal successors, (212), 105 states have internal predecessors, (212), 0 states have call successors, (0), 0 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 19:21:35,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 212 transitions. [2021-06-12 19:21:35,665 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 212 transitions. Word has length 19 [2021-06-12 19:21:35,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:35,665 INFO L482 AbstractCegarLoop]: Abstraction has 106 states and 212 transitions. [2021-06-12 19:21:35,665 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:21:35,665 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 212 transitions. [2021-06-12 19:21:35,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:21:35,665 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:35,665 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:35,866 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:35,866 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:35,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:35,866 INFO L82 PathProgramCache]: Analyzing trace with hash -568937250, now seen corresponding path program 88 times [2021-06-12 19:21:35,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:35,866 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174439864] [2021-06-12 19:21:35,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:35,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:35,954 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:35,954 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:35,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174439864] [2021-06-12 19:21:35,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174439864] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:35,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245225538] [2021-06-12 19:21:35,955 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 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:35,975 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:21:35,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:35,976 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 19:21:35,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:36,128 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:36,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245225538] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:36,128 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:36,128 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 19:21:36,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952574743] [2021-06-12 19:21:36,129 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:21:36,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:36,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:21:36,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:21:36,129 INFO L87 Difference]: Start difference. First operand 106 states and 212 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:21:36,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:36,555 INFO L93 Difference]: Finished difference Result 198 states and 383 transitions. [2021-06-12 19:21:36,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 19:21:36,555 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-12 19:21:36,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:36,556 INFO L225 Difference]: With dead ends: 198 [2021-06-12 19:21:36,556 INFO L226 Difference]: Without dead ends: 191 [2021-06-12 19:21:36,556 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 390.6ms TimeCoverageRelationStatistics Valid=143, Invalid=613, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:21:36,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-06-12 19:21:36,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 108. [2021-06-12 19:21:36,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.046728971962617) internal successors, (219), 107 states have internal predecessors, (219), 0 states have call successors, (0), 0 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 19:21:36,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 219 transitions. [2021-06-12 19:21:36,557 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 219 transitions. Word has length 19 [2021-06-12 19:21:36,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:36,557 INFO L482 AbstractCegarLoop]: Abstraction has 108 states and 219 transitions. [2021-06-12 19:21:36,558 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:21:36,558 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 219 transitions. [2021-06-12 19:21:36,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:21:36,558 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:36,558 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:36,766 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2021-06-12 19:21:36,766 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:36,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:36,766 INFO L82 PathProgramCache]: Analyzing trace with hash -553476454, now seen corresponding path program 89 times [2021-06-12 19:21:36,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:36,767 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744195190] [2021-06-12 19:21:36,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:36,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:37,025 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:37,025 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:37,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744195190] [2021-06-12 19:21:37,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744195190] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:37,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959729649] [2021-06-12 19:21:37,025 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 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:37,079 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:21:37,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:37,082 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 19:21:37,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:37,253 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:37,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959729649] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:37,253 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:37,253 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 19:21:37,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842943860] [2021-06-12 19:21:37,254 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:21:37,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:37,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:21:37,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:21:37,254 INFO L87 Difference]: Start difference. First operand 108 states and 219 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:21:37,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:37,719 INFO L93 Difference]: Finished difference Result 209 states and 402 transitions. [2021-06-12 19:21:37,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 19:21:37,720 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-12 19:21:37,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:37,720 INFO L225 Difference]: With dead ends: 209 [2021-06-12 19:21:37,720 INFO L226 Difference]: Without dead ends: 202 [2021-06-12 19:21:37,720 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 624.9ms TimeCoverageRelationStatistics Valid=152, Invalid=718, Unknown=0, NotChecked=0, Total=870 [2021-06-12 19:21:37,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-06-12 19:21:37,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 107. [2021-06-12 19:21:37,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 2.0283018867924527) internal successors, (215), 106 states have internal predecessors, (215), 0 states have call successors, (0), 0 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 19:21:37,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 215 transitions. [2021-06-12 19:21:37,737 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 215 transitions. Word has length 19 [2021-06-12 19:21:37,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:37,737 INFO L482 AbstractCegarLoop]: Abstraction has 107 states and 215 transitions. [2021-06-12 19:21:37,737 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:21:37,737 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 215 transitions. [2021-06-12 19:21:37,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:21:37,738 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:37,738 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:37,938 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:37,938 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:37,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:37,938 INFO L82 PathProgramCache]: Analyzing trace with hash 17978352, now seen corresponding path program 90 times [2021-06-12 19:21:37,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:37,939 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231915697] [2021-06-12 19:21:37,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:37,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:38,017 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:38,017 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:38,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231915697] [2021-06-12 19:21:38,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231915697] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:38,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330472658] [2021-06-12 19:21:38,017 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 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:38,037 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:21:38,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:38,037 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 19:21:38,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:38,228 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:38,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1330472658] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:38,229 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:38,229 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 19:21:38,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504814503] [2021-06-12 19:21:38,229 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:21:38,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:38,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:21:38,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:21:38,229 INFO L87 Difference]: Start difference. First operand 107 states and 215 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:21:38,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:38,630 INFO L93 Difference]: Finished difference Result 156 states and 301 transitions. [2021-06-12 19:21:38,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 19:21:38,631 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-12 19:21:38,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:38,631 INFO L225 Difference]: With dead ends: 156 [2021-06-12 19:21:38,631 INFO L226 Difference]: Without dead ends: 149 [2021-06-12 19:21:38,632 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 385.3ms TimeCoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:21:38,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-06-12 19:21:38,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 105. [2021-06-12 19:21:38,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.019230769230769) internal successors, (210), 104 states have internal predecessors, (210), 0 states have call successors, (0), 0 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 19:21:38,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 210 transitions. [2021-06-12 19:21:38,633 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 210 transitions. Word has length 19 [2021-06-12 19:21:38,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:38,633 INFO L482 AbstractCegarLoop]: Abstraction has 105 states and 210 transitions. [2021-06-12 19:21:38,633 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:21:38,633 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 210 transitions. [2021-06-12 19:21:38,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:21:38,633 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:38,633 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:38,850 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:38,850 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:38,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:38,851 INFO L82 PathProgramCache]: Analyzing trace with hash -1663028838, now seen corresponding path program 91 times [2021-06-12 19:21:38,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:38,851 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904918830] [2021-06-12 19:21:38,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:38,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:38,942 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:38,942 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:38,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904918830] [2021-06-12 19:21:38,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904918830] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:38,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938497563] [2021-06-12 19:21:38,942 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 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:38,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:38,963 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 19:21:38,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:39,194 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:39,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [938497563] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:39,194 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:39,194 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 19:21:39,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243272182] [2021-06-12 19:21:39,194 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:21:39,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:39,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:21:39,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:21:39,195 INFO L87 Difference]: Start difference. First operand 105 states and 210 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:21:39,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:39,780 INFO L93 Difference]: Finished difference Result 231 states and 445 transitions. [2021-06-12 19:21:39,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 19:21:39,781 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-12 19:21:39,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:39,782 INFO L225 Difference]: With dead ends: 231 [2021-06-12 19:21:39,782 INFO L226 Difference]: Without dead ends: 224 [2021-06-12 19:21:39,782 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 495.9ms TimeCoverageRelationStatistics Valid=138, Invalid=674, Unknown=0, NotChecked=0, Total=812 [2021-06-12 19:21:39,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-06-12 19:21:39,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 108. [2021-06-12 19:21:39,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.0654205607476634) internal successors, (221), 107 states have internal predecessors, (221), 0 states have call successors, (0), 0 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 19:21:39,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 221 transitions. [2021-06-12 19:21:39,783 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 221 transitions. Word has length 19 [2021-06-12 19:21:39,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:39,783 INFO L482 AbstractCegarLoop]: Abstraction has 108 states and 221 transitions. [2021-06-12 19:21:39,783 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:21:39,784 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 221 transitions. [2021-06-12 19:21:39,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:21:39,784 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:39,784 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:39,994 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-06-12 19:21:39,995 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:39,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:39,995 INFO L82 PathProgramCache]: Analyzing trace with hash -1647568042, now seen corresponding path program 92 times [2021-06-12 19:21:39,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:39,995 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675718183] [2021-06-12 19:21:39,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:39,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:40,097 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:40,097 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:40,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675718183] [2021-06-12 19:21:40,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675718183] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:40,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183805545] [2021-06-12 19:21:40,097 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 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:40,118 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:21:40,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:40,119 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 19:21:40,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:40,285 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:40,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183805545] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:40,286 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:40,286 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 19:21:40,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586846591] [2021-06-12 19:21:40,286 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:21:40,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:40,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:21:40,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:21:40,286 INFO L87 Difference]: Start difference. First operand 108 states and 221 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:21:40,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:40,933 INFO L93 Difference]: Finished difference Result 245 states and 469 transitions. [2021-06-12 19:21:40,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 19:21:40,933 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-12 19:21:40,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:40,934 INFO L225 Difference]: With dead ends: 245 [2021-06-12 19:21:40,934 INFO L226 Difference]: Without dead ends: 238 [2021-06-12 19:21:40,934 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 485.5ms TimeCoverageRelationStatistics Valid=153, Invalid=777, Unknown=0, NotChecked=0, Total=930 [2021-06-12 19:21:40,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-06-12 19:21:40,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 107. [2021-06-12 19:21:40,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 2.047169811320755) internal successors, (217), 106 states have internal predecessors, (217), 0 states have call successors, (0), 0 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 19:21:40,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 217 transitions. [2021-06-12 19:21:40,935 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 217 transitions. Word has length 19 [2021-06-12 19:21:40,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:40,935 INFO L482 AbstractCegarLoop]: Abstraction has 107 states and 217 transitions. [2021-06-12 19:21:40,936 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:21:40,936 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 217 transitions. [2021-06-12 19:21:40,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:21:40,936 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:40,936 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:41,148 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-06-12 19:21:41,149 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:41,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:41,149 INFO L82 PathProgramCache]: Analyzing trace with hash -1076113236, now seen corresponding path program 93 times [2021-06-12 19:21:41,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:41,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995055191] [2021-06-12 19:21:41,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:41,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:41,250 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:41,250 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:41,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995055191] [2021-06-12 19:21:41,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995055191] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:41,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321485612] [2021-06-12 19:21:41,250 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 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:41,271 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 19:21:41,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:41,272 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 19:21:41,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:41,485 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:41,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321485612] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:41,485 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:41,485 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 19:21:41,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955333356] [2021-06-12 19:21:41,486 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:21:41,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:41,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:21:41,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:21:41,486 INFO L87 Difference]: Start difference. First operand 107 states and 217 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:21:41,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:41,976 INFO L93 Difference]: Finished difference Result 193 states and 368 transitions. [2021-06-12 19:21:41,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 19:21:41,976 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-12 19:21:41,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:41,977 INFO L225 Difference]: With dead ends: 193 [2021-06-12 19:21:41,977 INFO L226 Difference]: Without dead ends: 186 [2021-06-12 19:21:41,977 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 489.8ms TimeCoverageRelationStatistics Valid=138, Invalid=792, Unknown=0, NotChecked=0, Total=930 [2021-06-12 19:21:41,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-06-12 19:21:41,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 106. [2021-06-12 19:21:41,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.038095238095238) internal successors, (214), 105 states have internal predecessors, (214), 0 states have call successors, (0), 0 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 19:21:41,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 214 transitions. [2021-06-12 19:21:41,979 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 214 transitions. Word has length 19 [2021-06-12 19:21:41,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:41,979 INFO L482 AbstractCegarLoop]: Abstraction has 106 states and 214 transitions. [2021-06-12 19:21:41,979 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:21:41,979 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 214 transitions. [2021-06-12 19:21:41,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:21:41,979 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:41,979 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:42,179 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-06-12 19:21:42,180 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:42,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:42,180 INFO L82 PathProgramCache]: Analyzing trace with hash 361302298, now seen corresponding path program 94 times [2021-06-12 19:21:42,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:42,180 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944205313] [2021-06-12 19:21:42,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:42,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:42,347 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:42,348 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:42,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944205313] [2021-06-12 19:21:42,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944205313] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:42,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592731324] [2021-06-12 19:21:42,348 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 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:42,368 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:21:42,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:42,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:21:42,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:42,583 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:42,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592731324] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:42,583 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:42,583 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 19:21:42,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20355415] [2021-06-12 19:21:42,583 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:21:42,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:42,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:21:42,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:21:42,583 INFO L87 Difference]: Start difference. First operand 106 states and 214 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:21:42,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:42,798 INFO L93 Difference]: Finished difference Result 142 states and 271 transitions. [2021-06-12 19:21:42,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:21:42,798 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-12 19:21:42,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:42,799 INFO L225 Difference]: With dead ends: 142 [2021-06-12 19:21:42,799 INFO L226 Difference]: Without dead ends: 135 [2021-06-12 19:21:42,799 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 342.3ms TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:21:42,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-06-12 19:21:42,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 106. [2021-06-12 19:21:42,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.038095238095238) internal successors, (214), 105 states have internal predecessors, (214), 0 states have call successors, (0), 0 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 19:21:42,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 214 transitions. [2021-06-12 19:21:42,800 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 214 transitions. Word has length 19 [2021-06-12 19:21:42,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:42,800 INFO L482 AbstractCegarLoop]: Abstraction has 106 states and 214 transitions. [2021-06-12 19:21:42,800 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:21:42,800 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 214 transitions. [2021-06-12 19:21:42,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:21:42,801 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:42,801 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:43,001 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-06-12 19:21:43,001 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:43,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:43,001 INFO L82 PathProgramCache]: Analyzing trace with hash -21418090, now seen corresponding path program 95 times [2021-06-12 19:21:43,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:43,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659669510] [2021-06-12 19:21:43,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:43,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:43,084 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:43,084 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:43,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659669510] [2021-06-12 19:21:43,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659669510] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:43,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57681964] [2021-06-12 19:21:43,084 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 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:43,103 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 19:21:43,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:43,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:21:43,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:43,297 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:43,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57681964] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:43,297 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:43,297 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 19:21:43,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12550166] [2021-06-12 19:21:43,298 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:21:43,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:43,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:21:43,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:21:43,298 INFO L87 Difference]: Start difference. First operand 106 states and 214 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:21:43,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:43,485 INFO L93 Difference]: Finished difference Result 139 states and 267 transitions. [2021-06-12 19:21:43,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:21:43,501 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-12 19:21:43,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:43,501 INFO L225 Difference]: With dead ends: 139 [2021-06-12 19:21:43,501 INFO L226 Difference]: Without dead ends: 132 [2021-06-12 19:21:43,501 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 271.3ms TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:21:43,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-06-12 19:21:43,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 107. [2021-06-12 19:21:43,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 2.047169811320755) internal successors, (217), 106 states have internal predecessors, (217), 0 states have call successors, (0), 0 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 19:21:43,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 217 transitions. [2021-06-12 19:21:43,503 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 217 transitions. Word has length 19 [2021-06-12 19:21:43,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:43,503 INFO L482 AbstractCegarLoop]: Abstraction has 107 states and 217 transitions. [2021-06-12 19:21:43,503 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:21:43,503 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 217 transitions. [2021-06-12 19:21:43,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:21:43,503 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:43,503 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:43,718 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-06-12 19:21:43,718 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:43,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:43,719 INFO L82 PathProgramCache]: Analyzing trace with hash 2057875738, now seen corresponding path program 96 times [2021-06-12 19:21:43,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:43,719 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728355949] [2021-06-12 19:21:43,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:43,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:43,804 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:43,804 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:43,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728355949] [2021-06-12 19:21:43,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728355949] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:43,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987624942] [2021-06-12 19:21:43,804 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 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:43,823 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 19:21:43,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:43,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:21:43,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:44,018 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:44,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987624942] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:44,019 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:44,019 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 19:21:44,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632602698] [2021-06-12 19:21:44,019 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:21:44,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:44,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:21:44,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:21:44,019 INFO L87 Difference]: Start difference. First operand 107 states and 217 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:21:44,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:44,308 INFO L93 Difference]: Finished difference Result 165 states and 315 transitions. [2021-06-12 19:21:44,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:21:44,308 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-12 19:21:44,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:44,308 INFO L225 Difference]: With dead ends: 165 [2021-06-12 19:21:44,308 INFO L226 Difference]: Without dead ends: 158 [2021-06-12 19:21:44,309 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 290.4ms TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:21:44,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-06-12 19:21:44,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 108. [2021-06-12 19:21:44,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.0654205607476634) internal successors, (221), 107 states have internal predecessors, (221), 0 states have call successors, (0), 0 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 19:21:44,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 221 transitions. [2021-06-12 19:21:44,313 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 221 transitions. Word has length 19 [2021-06-12 19:21:44,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:44,313 INFO L482 AbstractCegarLoop]: Abstraction has 108 states and 221 transitions. [2021-06-12 19:21:44,313 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:21:44,313 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 221 transitions. [2021-06-12 19:21:44,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:21:44,314 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:44,314 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:44,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-06-12 19:21:44,529 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:44,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:44,529 INFO L82 PathProgramCache]: Analyzing trace with hash 2073336534, now seen corresponding path program 97 times [2021-06-12 19:21:44,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:44,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67233911] [2021-06-12 19:21:44,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:44,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:44,614 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:44,614 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:44,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67233911] [2021-06-12 19:21:44,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67233911] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:44,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26672296] [2021-06-12 19:21:44,614 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 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:44,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:44,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:21:44,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:44,824 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:44,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26672296] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:44,824 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:44,824 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 19:21:44,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953210555] [2021-06-12 19:21:44,825 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:21:44,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:44,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:21:44,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:21:44,825 INFO L87 Difference]: Start difference. First operand 108 states and 221 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:21:45,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:45,018 INFO L93 Difference]: Finished difference Result 152 states and 297 transitions. [2021-06-12 19:21:45,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:21:45,019 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-12 19:21:45,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:45,019 INFO L225 Difference]: With dead ends: 152 [2021-06-12 19:21:45,019 INFO L226 Difference]: Without dead ends: 145 [2021-06-12 19:21:45,019 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 289.2ms TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:21:45,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-06-12 19:21:45,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 106. [2021-06-12 19:21:45,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.038095238095238) internal successors, (214), 105 states have internal predecessors, (214), 0 states have call successors, (0), 0 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 19:21:45,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 214 transitions. [2021-06-12 19:21:45,020 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 214 transitions. Word has length 19 [2021-06-12 19:21:45,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:45,020 INFO L482 AbstractCegarLoop]: Abstraction has 106 states and 214 transitions. [2021-06-12 19:21:45,021 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:21:45,021 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 214 transitions. [2021-06-12 19:21:45,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:21:45,021 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:45,021 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:45,232 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2021-06-12 19:21:45,233 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:45,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:45,233 INFO L82 PathProgramCache]: Analyzing trace with hash -1613968814, now seen corresponding path program 98 times [2021-06-12 19:21:45,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:45,233 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432618621] [2021-06-12 19:21:45,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:45,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:45,309 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:45,309 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:45,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432618621] [2021-06-12 19:21:45,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432618621] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:45,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55419517] [2021-06-12 19:21:45,310 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 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:45,329 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:21:45,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:45,330 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 19:21:45,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:45,494 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:45,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55419517] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:45,494 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:45,495 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 19:21:45,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182041522] [2021-06-12 19:21:45,495 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:21:45,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:45,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:21:45,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:21:45,495 INFO L87 Difference]: Start difference. First operand 106 states and 214 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:21:45,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:45,852 INFO L93 Difference]: Finished difference Result 186 states and 349 transitions. [2021-06-12 19:21:45,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:21:45,853 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-12 19:21:45,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:45,853 INFO L225 Difference]: With dead ends: 186 [2021-06-12 19:21:45,853 INFO L226 Difference]: Without dead ends: 172 [2021-06-12 19:21:45,853 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 354.2ms TimeCoverageRelationStatistics Valid=119, Invalid=637, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:21:45,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-06-12 19:21:45,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 105. [2021-06-12 19:21:45,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.0288461538461537) internal successors, (211), 104 states have internal predecessors, (211), 0 states have call successors, (0), 0 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 19:21:45,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 211 transitions. [2021-06-12 19:21:45,854 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 211 transitions. Word has length 19 [2021-06-12 19:21:45,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:45,855 INFO L482 AbstractCegarLoop]: Abstraction has 105 states and 211 transitions. [2021-06-12 19:21:45,855 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:21:45,855 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 211 transitions. [2021-06-12 19:21:45,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:21:45,855 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:45,855 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:46,055 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:46,056 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:46,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:46,056 INFO L82 PathProgramCache]: Analyzing trace with hash 1757683798, now seen corresponding path program 99 times [2021-06-12 19:21:46,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:46,056 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619630285] [2021-06-12 19:21:46,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:46,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:46,138 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:46,138 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:46,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619630285] [2021-06-12 19:21:46,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619630285] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:46,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792139589] [2021-06-12 19:21:46,138 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 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:46,158 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 19:21:46,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:46,159 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 19:21:46,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:46,310 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:46,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792139589] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:46,310 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:46,310 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 19:21:46,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282225636] [2021-06-12 19:21:46,310 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:21:46,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:46,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:21:46,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:21:46,311 INFO L87 Difference]: Start difference. First operand 105 states and 211 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:21:47,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:47,150 INFO L93 Difference]: Finished difference Result 286 states and 540 transitions. [2021-06-12 19:21:47,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-12 19:21:47,150 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-12 19:21:47,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:47,151 INFO L225 Difference]: With dead ends: 286 [2021-06-12 19:21:47,151 INFO L226 Difference]: Without dead ends: 279 [2021-06-12 19:21:47,151 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 701.0ms TimeCoverageRelationStatistics Valid=265, Invalid=1541, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 19:21:47,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2021-06-12 19:21:47,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 109. [2021-06-12 19:21:47,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.0833333333333335) internal successors, (225), 108 states have internal predecessors, (225), 0 states have call successors, (0), 0 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 19:21:47,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 225 transitions. [2021-06-12 19:21:47,153 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 225 transitions. Word has length 19 [2021-06-12 19:21:47,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:47,153 INFO L482 AbstractCegarLoop]: Abstraction has 109 states and 225 transitions. [2021-06-12 19:21:47,153 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:21:47,153 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 225 transitions. [2021-06-12 19:21:47,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:21:47,153 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:47,153 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:47,368 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-06-12 19:21:47,368 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:47,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:47,369 INFO L82 PathProgramCache]: Analyzing trace with hash 1773144594, now seen corresponding path program 100 times [2021-06-12 19:21:47,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:47,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533223510] [2021-06-12 19:21:47,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:47,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:47,466 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:47,466 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:47,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533223510] [2021-06-12 19:21:47,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533223510] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:47,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19030348] [2021-06-12 19:21:47,466 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 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-12 19:21:47,486 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:21:47,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:47,487 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 19:21:47,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:47,665 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:47,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19030348] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:47,665 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:47,665 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 19:21:47,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558349400] [2021-06-12 19:21:47,665 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:21:47,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:47,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:21:47,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:21:47,666 INFO L87 Difference]: Start difference. First operand 109 states and 225 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:21:48,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:48,625 INFO L93 Difference]: Finished difference Result 295 states and 558 transitions. [2021-06-12 19:21:48,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-12 19:21:48,625 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-12 19:21:48,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:48,626 INFO L225 Difference]: With dead ends: 295 [2021-06-12 19:21:48,626 INFO L226 Difference]: Without dead ends: 288 [2021-06-12 19:21:48,626 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 763.7ms TimeCoverageRelationStatistics Valid=314, Invalid=1578, Unknown=0, NotChecked=0, Total=1892 [2021-06-12 19:21:48,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2021-06-12 19:21:48,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 108. [2021-06-12 19:21:48,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.0654205607476634) internal successors, (221), 107 states have internal predecessors, (221), 0 states have call successors, (0), 0 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 19:21:48,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 221 transitions. [2021-06-12 19:21:48,628 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 221 transitions. Word has length 19 [2021-06-12 19:21:48,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:48,628 INFO L482 AbstractCegarLoop]: Abstraction has 108 states and 221 transitions. [2021-06-12 19:21:48,628 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:21:48,628 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 221 transitions. [2021-06-12 19:21:48,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:21:48,628 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:48,628 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:48,828 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:48,829 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:48,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:48,829 INFO L82 PathProgramCache]: Analyzing trace with hash -1950367896, now seen corresponding path program 101 times [2021-06-12 19:21:48,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:48,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199603791] [2021-06-12 19:21:48,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:48,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:48,906 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:48,907 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:48,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199603791] [2021-06-12 19:21:48,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199603791] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:48,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498960868] [2021-06-12 19:21:48,907 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:48,927 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:21:48,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:48,928 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 19:21:48,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:49,106 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:49,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498960868] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:49,106 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:49,106 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 19:21:49,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480048804] [2021-06-12 19:21:49,106 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:21:49,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:49,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:21:49,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:21:49,106 INFO L87 Difference]: Start difference. First operand 108 states and 221 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:21:49,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:49,859 INFO L93 Difference]: Finished difference Result 223 states and 419 transitions. [2021-06-12 19:21:49,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 19:21:49,860 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-12 19:21:49,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:49,860 INFO L225 Difference]: With dead ends: 223 [2021-06-12 19:21:49,860 INFO L226 Difference]: Without dead ends: 216 [2021-06-12 19:21:49,860 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 678.1ms TimeCoverageRelationStatistics Valid=233, Invalid=1249, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 19:21:49,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-06-12 19:21:49,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 108. [2021-06-12 19:21:49,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.0654205607476634) internal successors, (221), 107 states have internal predecessors, (221), 0 states have call successors, (0), 0 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 19:21:49,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 221 transitions. [2021-06-12 19:21:49,862 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 221 transitions. Word has length 19 [2021-06-12 19:21:49,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:49,862 INFO L482 AbstractCegarLoop]: Abstraction has 108 states and 221 transitions. [2021-06-12 19:21:49,862 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:21:49,862 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 221 transitions. [2021-06-12 19:21:49,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:21:49,862 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:49,862 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:50,062 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable109 [2021-06-12 19:21:50,063 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:50,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:50,063 INFO L82 PathProgramCache]: Analyzing trace with hash -512952362, now seen corresponding path program 102 times [2021-06-12 19:21:50,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:50,063 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472642731] [2021-06-12 19:21:50,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:50,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:50,141 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:50,141 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:50,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472642731] [2021-06-12 19:21:50,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472642731] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:50,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725916434] [2021-06-12 19:21:50,141 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 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:50,161 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 19:21:50,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:50,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:21:50,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:50,350 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:50,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [725916434] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:50,350 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:50,350 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 19:21:50,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174373745] [2021-06-12 19:21:50,351 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:21:50,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:50,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:21:50,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:21:50,351 INFO L87 Difference]: Start difference. First operand 108 states and 221 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:21:50,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:50,575 INFO L93 Difference]: Finished difference Result 146 states and 288 transitions. [2021-06-12 19:21:50,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:21:50,575 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-12 19:21:50,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:50,575 INFO L225 Difference]: With dead ends: 146 [2021-06-12 19:21:50,575 INFO L226 Difference]: Without dead ends: 139 [2021-06-12 19:21:50,576 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 277.9ms TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:21:50,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-06-12 19:21:50,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 110. [2021-06-12 19:21:50,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.091743119266055) internal successors, (228), 109 states have internal predecessors, (228), 0 states have call successors, (0), 0 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 19:21:50,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 228 transitions. [2021-06-12 19:21:50,577 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 228 transitions. Word has length 19 [2021-06-12 19:21:50,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:50,577 INFO L482 AbstractCegarLoop]: Abstraction has 110 states and 228 transitions. [2021-06-12 19:21:50,577 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:21:50,577 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 228 transitions. [2021-06-12 19:21:50,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:21:50,577 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:50,577 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:50,778 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:50,778 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:50,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:50,778 INFO L82 PathProgramCache]: Analyzing trace with hash -895672750, now seen corresponding path program 103 times [2021-06-12 19:21:50,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:50,778 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323682331] [2021-06-12 19:21:50,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:50,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:50,945 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:50,946 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:50,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323682331] [2021-06-12 19:21:50,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323682331] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:50,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99333677] [2021-06-12 19:21:50,946 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 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:50,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:50,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:21:50,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:51,177 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:51,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99333677] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:51,178 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:51,178 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 19:21:51,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964409654] [2021-06-12 19:21:51,178 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:21:51,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:51,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:21:51,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:21:51,178 INFO L87 Difference]: Start difference. First operand 110 states and 228 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:21:51,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:51,415 INFO L93 Difference]: Finished difference Result 151 states and 298 transitions. [2021-06-12 19:21:51,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:21:51,415 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-12 19:21:51,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:51,416 INFO L225 Difference]: With dead ends: 151 [2021-06-12 19:21:51,416 INFO L226 Difference]: Without dead ends: 144 [2021-06-12 19:21:51,416 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 337.8ms TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:21:51,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-06-12 19:21:51,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 111. [2021-06-12 19:21:51,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.1) internal successors, (231), 110 states have internal predecessors, (231), 0 states have call successors, (0), 0 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 19:21:51,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 231 transitions. [2021-06-12 19:21:51,417 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 231 transitions. Word has length 19 [2021-06-12 19:21:51,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:51,417 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 231 transitions. [2021-06-12 19:21:51,417 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:21:51,417 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 231 transitions. [2021-06-12 19:21:51,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:21:51,417 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:51,417 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:51,618 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-06-12 19:21:51,618 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:51,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:51,618 INFO L82 PathProgramCache]: Analyzing trace with hash 1183621078, now seen corresponding path program 104 times [2021-06-12 19:21:51,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:51,618 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432400200] [2021-06-12 19:21:51,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:51,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:51,721 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:51,721 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:51,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432400200] [2021-06-12 19:21:51,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432400200] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:51,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162710517] [2021-06-12 19:21:51,722 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 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:51,744 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:21:51,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:51,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:21:51,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:51,970 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:51,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162710517] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:51,970 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:51,970 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 19:21:51,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471395274] [2021-06-12 19:21:51,970 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:21:51,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:51,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:21:51,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:21:51,971 INFO L87 Difference]: Start difference. First operand 111 states and 231 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:21:52,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:52,298 INFO L93 Difference]: Finished difference Result 176 states and 344 transitions. [2021-06-12 19:21:52,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:21:52,298 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-12 19:21:52,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:52,299 INFO L225 Difference]: With dead ends: 176 [2021-06-12 19:21:52,299 INFO L226 Difference]: Without dead ends: 169 [2021-06-12 19:21:52,299 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 366.7ms TimeCoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:21:52,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-06-12 19:21:52,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 112. [2021-06-12 19:21:52,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.1171171171171173) internal successors, (235), 111 states have internal predecessors, (235), 0 states have call successors, (0), 0 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 19:21:52,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 235 transitions. [2021-06-12 19:21:52,300 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 235 transitions. Word has length 19 [2021-06-12 19:21:52,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:52,300 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 235 transitions. [2021-06-12 19:21:52,300 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:21:52,300 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 235 transitions. [2021-06-12 19:21:52,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:21:52,301 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:52,301 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:52,511 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-06-12 19:21:52,511 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:52,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:52,512 INFO L82 PathProgramCache]: Analyzing trace with hash 1199081874, now seen corresponding path program 105 times [2021-06-12 19:21:52,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:52,512 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995379209] [2021-06-12 19:21:52,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:52,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:52,597 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:52,598 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:52,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995379209] [2021-06-12 19:21:52,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995379209] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:52,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152046295] [2021-06-12 19:21:52,598 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 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:52,646 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:21:52,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:52,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:21:52,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:52,842 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:52,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152046295] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:52,842 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:52,842 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 19:21:52,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601865691] [2021-06-12 19:21:52,843 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:21:52,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:52,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:21:52,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:21:52,843 INFO L87 Difference]: Start difference. First operand 112 states and 235 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:21:53,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:53,171 INFO L93 Difference]: Finished difference Result 163 states and 326 transitions. [2021-06-12 19:21:53,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:21:53,171 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-12 19:21:53,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:53,172 INFO L225 Difference]: With dead ends: 163 [2021-06-12 19:21:53,172 INFO L226 Difference]: Without dead ends: 156 [2021-06-12 19:21:53,172 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 332.2ms TimeCoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:21:53,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-06-12 19:21:53,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 110. [2021-06-12 19:21:53,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.091743119266055) internal successors, (228), 109 states have internal predecessors, (228), 0 states have call successors, (0), 0 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 19:21:53,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 228 transitions. [2021-06-12 19:21:53,173 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 228 transitions. Word has length 19 [2021-06-12 19:21:53,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:53,173 INFO L482 AbstractCegarLoop]: Abstraction has 110 states and 228 transitions. [2021-06-12 19:21:53,173 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:21:53,173 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 228 transitions. [2021-06-12 19:21:53,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:21:53,174 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:53,174 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:53,374 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-06-12 19:21:53,374 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:53,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:53,374 INFO L82 PathProgramCache]: Analyzing trace with hash 1806743822, now seen corresponding path program 106 times [2021-06-12 19:21:53,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:53,374 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179893085] [2021-06-12 19:21:53,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:53,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:53,451 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:53,451 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:53,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179893085] [2021-06-12 19:21:53,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179893085] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:53,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108841430] [2021-06-12 19:21:53,451 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 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:53,470 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:21:53,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:53,471 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 19:21:53,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:53,631 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:53,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108841430] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:53,631 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:53,631 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 19:21:53,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364696486] [2021-06-12 19:21:53,631 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:21:53,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:53,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:21:53,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:21:53,631 INFO L87 Difference]: Start difference. First operand 110 states and 228 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:21:54,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:54,266 INFO L93 Difference]: Finished difference Result 236 states and 440 transitions. [2021-06-12 19:21:54,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 19:21:54,266 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-12 19:21:54,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:54,266 INFO L225 Difference]: With dead ends: 236 [2021-06-12 19:21:54,266 INFO L226 Difference]: Without dead ends: 176 [2021-06-12 19:21:54,267 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 622.1ms TimeCoverageRelationStatistics Valid=254, Invalid=1152, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 19:21:54,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-06-12 19:21:54,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 109. [2021-06-12 19:21:54,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.037037037037037) internal successors, (220), 108 states have internal predecessors, (220), 0 states have call successors, (0), 0 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 19:21:54,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 220 transitions. [2021-06-12 19:21:54,268 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 220 transitions. Word has length 19 [2021-06-12 19:21:54,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:54,268 INFO L482 AbstractCegarLoop]: Abstraction has 109 states and 220 transitions. [2021-06-12 19:21:54,268 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:21:54,268 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 220 transitions. [2021-06-12 19:21:54,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:21:54,268 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:54,268 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:54,468 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:54,469 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:54,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:54,469 INFO L82 PathProgramCache]: Analyzing trace with hash 117019782, now seen corresponding path program 107 times [2021-06-12 19:21:54,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:54,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393988424] [2021-06-12 19:21:54,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:54,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:54,548 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:54,548 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:54,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393988424] [2021-06-12 19:21:54,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393988424] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:54,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636052197] [2021-06-12 19:21:54,548 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 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:54,567 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:21:54,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:54,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:21:54,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:54,772 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:54,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636052197] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:54,772 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:54,772 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 19:21:54,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866925651] [2021-06-12 19:21:54,772 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:21:54,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:54,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:21:54,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:21:54,773 INFO L87 Difference]: Start difference. First operand 109 states and 220 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:21:54,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:54,930 INFO L93 Difference]: Finished difference Result 126 states and 248 transitions. [2021-06-12 19:21:54,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:21:54,930 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-12 19:21:54,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:54,930 INFO L225 Difference]: With dead ends: 126 [2021-06-12 19:21:54,930 INFO L226 Difference]: Without dead ends: 119 [2021-06-12 19:21:54,930 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 272.0ms TimeCoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:21:54,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-06-12 19:21:54,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 111. [2021-06-12 19:21:54,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.0454545454545454) internal successors, (225), 110 states have internal predecessors, (225), 0 states have call successors, (0), 0 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 19:21:54,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 225 transitions. [2021-06-12 19:21:54,932 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 225 transitions. Word has length 19 [2021-06-12 19:21:54,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:54,932 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 225 transitions. [2021-06-12 19:21:54,932 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:21:54,932 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 225 transitions. [2021-06-12 19:21:54,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:21:54,932 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:54,932 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:55,132 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2021-06-12 19:21:55,133 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:55,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:55,133 INFO L82 PathProgramCache]: Analyzing trace with hash -2098653686, now seen corresponding path program 108 times [2021-06-12 19:21:55,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:55,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420280178] [2021-06-12 19:21:55,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:55,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:55,223 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:55,224 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:55,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420280178] [2021-06-12 19:21:55,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420280178] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:55,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177344271] [2021-06-12 19:21:55,224 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 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:55,243 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:21:55,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:55,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:21:55,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:55,434 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:55,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1177344271] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:55,434 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:55,434 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 19:21:55,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238522764] [2021-06-12 19:21:55,434 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:21:55,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:55,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:21:55,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:21:55,435 INFO L87 Difference]: Start difference. First operand 111 states and 225 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:21:55,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:55,675 INFO L93 Difference]: Finished difference Result 150 states and 291 transitions. [2021-06-12 19:21:55,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:21:55,675 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-12 19:21:55,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:55,676 INFO L225 Difference]: With dead ends: 150 [2021-06-12 19:21:55,676 INFO L226 Difference]: Without dead ends: 143 [2021-06-12 19:21:55,676 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 316.1ms TimeCoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:21:55,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-06-12 19:21:55,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 112. [2021-06-12 19:21:55,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.063063063063063) internal successors, (229), 111 states have internal predecessors, (229), 0 states have call successors, (0), 0 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 19:21:55,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 229 transitions. [2021-06-12 19:21:55,677 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 229 transitions. Word has length 19 [2021-06-12 19:21:55,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:55,677 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 229 transitions. [2021-06-12 19:21:55,677 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:21:55,677 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 229 transitions. [2021-06-12 19:21:55,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:21:55,677 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:55,677 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:55,878 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:55,878 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:55,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:55,879 INFO L82 PathProgramCache]: Analyzing trace with hash -2083192890, now seen corresponding path program 109 times [2021-06-12 19:21:55,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:55,879 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937837281] [2021-06-12 19:21:55,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:55,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:55,967 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:55,967 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:55,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937837281] [2021-06-12 19:21:55,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937837281] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:55,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117912157] [2021-06-12 19:21:55,967 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 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:55,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:55,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:21:55,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:56,183 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:56,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1117912157] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:56,183 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:56,183 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 19:21:56,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184968959] [2021-06-12 19:21:56,183 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:21:56,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:56,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:21:56,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:21:56,183 INFO L87 Difference]: Start difference. First operand 112 states and 229 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:21:56,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:56,441 INFO L93 Difference]: Finished difference Result 137 states and 273 transitions. [2021-06-12 19:21:56,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:21:56,442 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-12 19:21:56,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:56,442 INFO L225 Difference]: With dead ends: 137 [2021-06-12 19:21:56,442 INFO L226 Difference]: Without dead ends: 130 [2021-06-12 19:21:56,442 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 317.8ms TimeCoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:21:56,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-06-12 19:21:56,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 110. [2021-06-12 19:21:56,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.036697247706422) internal successors, (222), 109 states have internal predecessors, (222), 0 states have call successors, (0), 0 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 19:21:56,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 222 transitions. [2021-06-12 19:21:56,443 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 222 transitions. Word has length 19 [2021-06-12 19:21:56,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:56,443 INFO L482 AbstractCegarLoop]: Abstraction has 110 states and 222 transitions. [2021-06-12 19:21:56,443 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:21:56,444 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 222 transitions. [2021-06-12 19:21:56,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:21:56,444 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:56,444 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:56,653 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:56,653 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:56,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:56,654 INFO L82 PathProgramCache]: Analyzing trace with hash 47517074, now seen corresponding path program 110 times [2021-06-12 19:21:56,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:56,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441632461] [2021-06-12 19:21:56,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:56,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:56,732 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:56,733 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:56,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441632461] [2021-06-12 19:21:56,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441632461] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:56,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445372666] [2021-06-12 19:21:56,733 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 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:56,756 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:21:56,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:56,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:21:56,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:56,964 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:56,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445372666] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:56,964 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:56,964 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 19:21:56,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382430757] [2021-06-12 19:21:56,964 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:21:56,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:56,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:21:56,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:21:56,964 INFO L87 Difference]: Start difference. First operand 110 states and 222 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:21:57,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:57,146 INFO L93 Difference]: Finished difference Result 145 states and 283 transitions. [2021-06-12 19:21:57,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:21:57,146 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-12 19:21:57,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:57,147 INFO L225 Difference]: With dead ends: 145 [2021-06-12 19:21:57,147 INFO L226 Difference]: Without dead ends: 138 [2021-06-12 19:21:57,147 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 283.1ms TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:21:57,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-06-12 19:21:57,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 112. [2021-06-12 19:21:57,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.063063063063063) internal successors, (229), 111 states have internal predecessors, (229), 0 states have call successors, (0), 0 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 19:21:57,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 229 transitions. [2021-06-12 19:21:57,148 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 229 transitions. Word has length 19 [2021-06-12 19:21:57,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:57,148 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 229 transitions. [2021-06-12 19:21:57,148 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:21:57,148 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 229 transitions. [2021-06-12 19:21:57,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:21:57,149 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:57,149 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:57,356 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-06-12 19:21:57,357 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:57,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:57,357 INFO L82 PathProgramCache]: Analyzing trace with hash 62977870, now seen corresponding path program 111 times [2021-06-12 19:21:57,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:57,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672511868] [2021-06-12 19:21:57,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:57,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:57,437 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:57,437 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:57,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672511868] [2021-06-12 19:21:57,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672511868] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:57,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771499285] [2021-06-12 19:21:57,437 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 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:57,457 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 19:21:57,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:57,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:21:57,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:57,642 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:57,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771499285] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:57,642 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:57,642 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 19:21:57,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624491825] [2021-06-12 19:21:57,642 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:21:57,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:57,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:21:57,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:21:57,643 INFO L87 Difference]: Start difference. First operand 112 states and 229 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:21:57,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:57,807 INFO L93 Difference]: Finished difference Result 151 states and 294 transitions. [2021-06-12 19:21:57,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:21:57,807 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-12 19:21:57,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:57,808 INFO L225 Difference]: With dead ends: 151 [2021-06-12 19:21:57,808 INFO L226 Difference]: Without dead ends: 144 [2021-06-12 19:21:57,808 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 265.4ms TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:21:57,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-06-12 19:21:57,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 111. [2021-06-12 19:21:57,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.0454545454545454) internal successors, (225), 110 states have internal predecessors, (225), 0 states have call successors, (0), 0 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 19:21:57,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 225 transitions. [2021-06-12 19:21:57,809 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 225 transitions. Word has length 19 [2021-06-12 19:21:57,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:57,809 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 225 transitions. [2021-06-12 19:21:57,809 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:21:57,809 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 225 transitions. [2021-06-12 19:21:57,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:21:57,809 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:57,810 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:58,010 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:58,010 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:58,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:58,010 INFO L82 PathProgramCache]: Analyzing trace with hash 634432676, now seen corresponding path program 112 times [2021-06-12 19:21:58,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:58,010 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989899093] [2021-06-12 19:21:58,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:58,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:58,087 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:58,087 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:58,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989899093] [2021-06-12 19:21:58,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989899093] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:58,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349579366] [2021-06-12 19:21:58,088 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 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:58,106 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:21:58,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:58,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:21:58,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:58,310 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:58,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349579366] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:58,310 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:58,310 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 19:21:58,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823906217] [2021-06-12 19:21:58,310 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:21:58,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:58,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:21:58,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:21:58,312 INFO L87 Difference]: Start difference. First operand 111 states and 225 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:21:58,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:58,456 INFO L93 Difference]: Finished difference Result 128 states and 253 transitions. [2021-06-12 19:21:58,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:21:58,456 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-12 19:21:58,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:58,457 INFO L225 Difference]: With dead ends: 128 [2021-06-12 19:21:58,457 INFO L226 Difference]: Without dead ends: 121 [2021-06-12 19:21:58,457 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 258.8ms TimeCoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:21:58,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-06-12 19:21:58,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 111. [2021-06-12 19:21:58,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.0454545454545454) internal successors, (225), 110 states have internal predecessors, (225), 0 states have call successors, (0), 0 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 19:21:58,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 225 transitions. [2021-06-12 19:21:58,458 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 225 transitions. Word has length 19 [2021-06-12 19:21:58,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:58,458 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 225 transitions. [2021-06-12 19:21:58,458 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:21:58,458 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 225 transitions. [2021-06-12 19:21:58,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:21:58,458 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:58,458 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:58,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:58,661 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:58,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:58,661 INFO L82 PathProgramCache]: Analyzing trace with hash 1180641562, now seen corresponding path program 113 times [2021-06-12 19:21:58,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:58,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134644075] [2021-06-12 19:21:58,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:58,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:58,738 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:58,739 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:58,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134644075] [2021-06-12 19:21:58,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134644075] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:58,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355072313] [2021-06-12 19:21:58,739 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 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:58,758 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 19:21:58,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:58,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:21:58,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:58,979 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:58,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355072313] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:58,979 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:58,979 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 19:21:58,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333515196] [2021-06-12 19:21:58,979 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:21:58,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:58,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:21:58,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:21:58,980 INFO L87 Difference]: Start difference. First operand 111 states and 225 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:21:59,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:59,205 INFO L93 Difference]: Finished difference Result 138 states and 271 transitions. [2021-06-12 19:21:59,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:21:59,205 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-12 19:21:59,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:59,206 INFO L225 Difference]: With dead ends: 138 [2021-06-12 19:21:59,206 INFO L226 Difference]: Without dead ends: 131 [2021-06-12 19:21:59,206 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 276.7ms TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:21:59,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-06-12 19:21:59,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 111. [2021-06-12 19:21:59,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.0454545454545454) internal successors, (225), 110 states have internal predecessors, (225), 0 states have call successors, (0), 0 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 19:21:59,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 225 transitions. [2021-06-12 19:21:59,207 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 225 transitions. Word has length 19 [2021-06-12 19:21:59,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:59,207 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 225 transitions. [2021-06-12 19:21:59,207 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:21:59,207 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 225 transitions. [2021-06-12 19:21:59,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:21:59,207 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:59,207 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:59,408 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,122 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:59,408 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:59,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:59,408 INFO L82 PathProgramCache]: Analyzing trace with hash 797921174, now seen corresponding path program 114 times [2021-06-12 19:21:59,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:59,408 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799639137] [2021-06-12 19:21:59,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:59,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:59,495 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:59,496 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:59,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799639137] [2021-06-12 19:21:59,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799639137] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:59,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131955630] [2021-06-12 19:21:59,496 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 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:59,517 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 19:21:59,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:59,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:21:59,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:59,728 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:59,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2131955630] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:59,729 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:59,729 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 19:21:59,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518513107] [2021-06-12 19:21:59,729 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:21:59,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:59,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:21:59,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:21:59,729 INFO L87 Difference]: Start difference. First operand 111 states and 225 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:21:59,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:59,914 INFO L93 Difference]: Finished difference Result 142 states and 279 transitions. [2021-06-12 19:21:59,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:21:59,914 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-12 19:21:59,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:59,914 INFO L225 Difference]: With dead ends: 142 [2021-06-12 19:21:59,914 INFO L226 Difference]: Without dead ends: 135 [2021-06-12 19:21:59,914 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 275.4ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:21:59,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-06-12 19:21:59,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 112. [2021-06-12 19:21:59,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.054054054054054) internal successors, (228), 111 states have internal predecessors, (228), 0 states have call successors, (0), 0 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 19:21:59,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 228 transitions. [2021-06-12 19:21:59,916 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 228 transitions. Word has length 19 [2021-06-12 19:21:59,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:59,916 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 228 transitions. [2021-06-12 19:21:59,916 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:21:59,916 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 228 transitions. [2021-06-12 19:21:59,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:21:59,916 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:59,916 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:00,116 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:00,117 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:00,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:00,117 INFO L82 PathProgramCache]: Analyzing trace with hash -1417752294, now seen corresponding path program 115 times [2021-06-12 19:22:00,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:00,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592869531] [2021-06-12 19:22:00,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:00,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:00,197 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:00,197 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:00,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592869531] [2021-06-12 19:22:00,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592869531] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:00,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626279486] [2021-06-12 19:22:00,197 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 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:00,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:00,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:22:00,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:00,409 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:00,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626279486] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:00,410 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:00,410 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 19:22:00,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928593446] [2021-06-12 19:22:00,410 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:22:00,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:00,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:22:00,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:22:00,410 INFO L87 Difference]: Start difference. First operand 112 states and 228 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:22:00,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:00,644 INFO L93 Difference]: Finished difference Result 164 states and 319 transitions. [2021-06-12 19:22:00,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:22:00,644 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-12 19:22:00,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:00,644 INFO L225 Difference]: With dead ends: 164 [2021-06-12 19:22:00,644 INFO L226 Difference]: Without dead ends: 157 [2021-06-12 19:22:00,644 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 294.1ms TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:22:00,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-06-12 19:22:00,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 113. [2021-06-12 19:22:00,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.0714285714285716) internal successors, (232), 112 states have internal predecessors, (232), 0 states have call successors, (0), 0 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 19:22:00,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 232 transitions. [2021-06-12 19:22:00,646 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 232 transitions. Word has length 19 [2021-06-12 19:22:00,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:00,646 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 232 transitions. [2021-06-12 19:22:00,646 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:22:00,646 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 232 transitions. [2021-06-12 19:22:00,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:22:00,646 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:00,646 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:00,846 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-06-12 19:22:00,847 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:00,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:00,847 INFO L82 PathProgramCache]: Analyzing trace with hash -1402291498, now seen corresponding path program 116 times [2021-06-12 19:22:00,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:00,847 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662305560] [2021-06-12 19:22:00,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:00,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:00,936 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:00,936 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:00,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662305560] [2021-06-12 19:22:00,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662305560] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:00,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074830840] [2021-06-12 19:22:00,936 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 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:00,956 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:22:00,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:22:00,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:22:00,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:01,146 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:01,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074830840] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:01,147 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:01,147 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 19:22:01,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462047174] [2021-06-12 19:22:01,147 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:22:01,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:01,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:22:01,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:22:01,147 INFO L87 Difference]: Start difference. First operand 113 states and 232 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:22:01,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:01,457 INFO L93 Difference]: Finished difference Result 151 states and 301 transitions. [2021-06-12 19:22:01,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:22:01,458 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-12 19:22:01,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:01,458 INFO L225 Difference]: With dead ends: 151 [2021-06-12 19:22:01,458 INFO L226 Difference]: Without dead ends: 144 [2021-06-12 19:22:01,458 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 287.1ms TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:22:01,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-06-12 19:22:01,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 110. [2021-06-12 19:22:01,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.036697247706422) internal successors, (222), 109 states have internal predecessors, (222), 0 states have call successors, (0), 0 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 19:22:01,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 222 transitions. [2021-06-12 19:22:01,459 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 222 transitions. Word has length 19 [2021-06-12 19:22:01,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:01,459 INFO L482 AbstractCegarLoop]: Abstraction has 110 states and 222 transitions. [2021-06-12 19:22:01,459 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:22:01,460 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 222 transitions. [2021-06-12 19:22:01,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:22:01,460 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:01,460 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:01,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-06-12 19:22:01,673 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:01,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:01,673 INFO L82 PathProgramCache]: Analyzing trace with hash 1810613706, now seen corresponding path program 117 times [2021-06-12 19:22:01,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:01,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301352897] [2021-06-12 19:22:01,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:01,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:01,748 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:01,748 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:01,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301352897] [2021-06-12 19:22:01,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301352897] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:01,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310108364] [2021-06-12 19:22:01,749 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 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:01,769 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 19:22:01,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:22:01,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:22:01,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:01,962 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:01,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310108364] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:01,962 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:01,962 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 19:22:01,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973527591] [2021-06-12 19:22:01,962 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:22:01,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:01,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:22:01,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:22:01,963 INFO L87 Difference]: Start difference. First operand 110 states and 222 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:22:02,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:02,150 INFO L93 Difference]: Finished difference Result 130 states and 256 transitions. [2021-06-12 19:22:02,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:22:02,150 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-12 19:22:02,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:02,151 INFO L225 Difference]: With dead ends: 130 [2021-06-12 19:22:02,151 INFO L226 Difference]: Without dead ends: 123 [2021-06-12 19:22:02,151 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 249.3ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:22:02,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-06-12 19:22:02,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 112. [2021-06-12 19:22:02,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.045045045045045) internal successors, (227), 111 states have internal predecessors, (227), 0 states have call successors, (0), 0 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 19:22:02,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 227 transitions. [2021-06-12 19:22:02,152 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 227 transitions. Word has length 19 [2021-06-12 19:22:02,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:02,152 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 227 transitions. [2021-06-12 19:22:02,152 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:22:02,152 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 227 transitions. [2021-06-12 19:22:02,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:22:02,152 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:02,152 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:02,353 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-06-12 19:22:02,353 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:02,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:02,353 INFO L82 PathProgramCache]: Analyzing trace with hash -405059762, now seen corresponding path program 118 times [2021-06-12 19:22:02,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:02,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339654240] [2021-06-12 19:22:02,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:02,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:02,432 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:02,432 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:02,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339654240] [2021-06-12 19:22:02,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339654240] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:02,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398245006] [2021-06-12 19:22:02,432 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 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:02,452 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:22:02,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:22:02,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:22:02,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:02,645 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:02,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398245006] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:02,646 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:02,646 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 19:22:02,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954651373] [2021-06-12 19:22:02,646 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:22:02,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:02,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:22:02,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:22:02,646 INFO L87 Difference]: Start difference. First operand 112 states and 227 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:22:02,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:02,876 INFO L93 Difference]: Finished difference Result 153 states and 297 transitions. [2021-06-12 19:22:02,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:22:02,877 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-12 19:22:02,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:02,877 INFO L225 Difference]: With dead ends: 153 [2021-06-12 19:22:02,877 INFO L226 Difference]: Without dead ends: 146 [2021-06-12 19:22:02,877 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 282.4ms TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:22:02,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-06-12 19:22:02,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 113. [2021-06-12 19:22:02,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.0625) internal successors, (231), 112 states have internal predecessors, (231), 0 states have call successors, (0), 0 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 19:22:02,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 231 transitions. [2021-06-12 19:22:02,878 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 231 transitions. Word has length 19 [2021-06-12 19:22:02,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:02,878 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 231 transitions. [2021-06-12 19:22:02,878 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:22:02,879 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 231 transitions. [2021-06-12 19:22:02,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:22:02,879 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:02,879 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:03,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:03,081 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:03,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:03,081 INFO L82 PathProgramCache]: Analyzing trace with hash -389598966, now seen corresponding path program 119 times [2021-06-12 19:22:03,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:03,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290783541] [2021-06-12 19:22:03,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:03,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:03,166 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:03,166 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:03,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290783541] [2021-06-12 19:22:03,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290783541] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:03,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632699171] [2021-06-12 19:22:03,166 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 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:03,188 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:22:03,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:22:03,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:22:03,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:03,397 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:03,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1632699171] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:03,397 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:03,397 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 19:22:03,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763006517] [2021-06-12 19:22:03,397 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:22:03,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:03,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:22:03,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:22:03,398 INFO L87 Difference]: Start difference. First operand 113 states and 231 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:22:03,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:03,636 INFO L93 Difference]: Finished difference Result 140 states and 279 transitions. [2021-06-12 19:22:03,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:22:03,636 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-12 19:22:03,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:03,636 INFO L225 Difference]: With dead ends: 140 [2021-06-12 19:22:03,636 INFO L226 Difference]: Without dead ends: 133 [2021-06-12 19:22:03,637 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 277.3ms TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:22:03,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-06-12 19:22:03,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 111. [2021-06-12 19:22:03,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.036363636363636) internal successors, (224), 110 states have internal predecessors, (224), 0 states have call successors, (0), 0 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 19:22:03,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 224 transitions. [2021-06-12 19:22:03,640 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 224 transitions. Word has length 19 [2021-06-12 19:22:03,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:03,640 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 224 transitions. [2021-06-12 19:22:03,640 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:22:03,640 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 224 transitions. [2021-06-12 19:22:03,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:22:03,640 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:03,640 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:03,856 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2021-06-12 19:22:03,856 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:03,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:03,856 INFO L82 PathProgramCache]: Analyzing trace with hash 1741110998, now seen corresponding path program 120 times [2021-06-12 19:22:03,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:03,856 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912912380] [2021-06-12 19:22:03,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:03,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:03,937 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:03,937 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:03,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912912380] [2021-06-12 19:22:03,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912912380] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:03,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308644084] [2021-06-12 19:22:03,937 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 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:03,962 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:22:03,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:22:03,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:22:03,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:04,154 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:04,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308644084] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:04,154 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:04,154 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 19:22:04,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039090612] [2021-06-12 19:22:04,154 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:22:04,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:04,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:22:04,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:22:04,155 INFO L87 Difference]: Start difference. First operand 111 states and 224 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:22:04,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:04,365 INFO L93 Difference]: Finished difference Result 150 states and 293 transitions. [2021-06-12 19:22:04,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:22:04,366 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-12 19:22:04,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:04,366 INFO L225 Difference]: With dead ends: 150 [2021-06-12 19:22:04,366 INFO L226 Difference]: Without dead ends: 143 [2021-06-12 19:22:04,366 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 275.6ms TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:22:04,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-06-12 19:22:04,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 113. [2021-06-12 19:22:04,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.0625) internal successors, (231), 112 states have internal predecessors, (231), 0 states have call successors, (0), 0 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 19:22:04,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 231 transitions. [2021-06-12 19:22:04,367 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 231 transitions. Word has length 19 [2021-06-12 19:22:04,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:04,367 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 231 transitions. [2021-06-12 19:22:04,367 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:22:04,367 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 231 transitions. [2021-06-12 19:22:04,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:22:04,368 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:04,368 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:04,583 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-06-12 19:22:04,583 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:04,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:04,583 INFO L82 PathProgramCache]: Analyzing trace with hash 1756571794, now seen corresponding path program 121 times [2021-06-12 19:22:04,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:04,583 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959902594] [2021-06-12 19:22:04,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:04,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:04,672 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:04,672 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:04,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959902594] [2021-06-12 19:22:04,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959902594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:04,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896947040] [2021-06-12 19:22:04,672 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 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-12 19:22:04,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:04,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:22:04,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:04,896 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:04,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [896947040] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:04,896 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:04,896 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 19:22:04,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394449915] [2021-06-12 19:22:04,896 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:22:04,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:04,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:22:04,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:22:04,896 INFO L87 Difference]: Start difference. First operand 113 states and 231 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:22:05,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:05,115 INFO L93 Difference]: Finished difference Result 156 states and 304 transitions. [2021-06-12 19:22:05,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:22:05,115 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-12 19:22:05,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:05,115 INFO L225 Difference]: With dead ends: 156 [2021-06-12 19:22:05,115 INFO L226 Difference]: Without dead ends: 149 [2021-06-12 19:22:05,116 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 272.9ms TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:22:05,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-06-12 19:22:05,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 112. [2021-06-12 19:22:05,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.045045045045045) internal successors, (227), 111 states have internal predecessors, (227), 0 states have call successors, (0), 0 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 19:22:05,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 227 transitions. [2021-06-12 19:22:05,117 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 227 transitions. Word has length 19 [2021-06-12 19:22:05,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:05,117 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 227 transitions. [2021-06-12 19:22:05,117 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:22:05,117 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 227 transitions. [2021-06-12 19:22:05,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:22:05,117 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:05,117 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:05,318 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-06-12 19:22:05,318 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:05,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:05,318 INFO L82 PathProgramCache]: Analyzing trace with hash -1966940696, now seen corresponding path program 122 times [2021-06-12 19:22:05,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:05,318 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455685941] [2021-06-12 19:22:05,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:05,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:05,396 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:05,396 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:05,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455685941] [2021-06-12 19:22:05,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455685941] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:05,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177596356] [2021-06-12 19:22:05,396 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 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:05,416 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:22:05,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:22:05,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:22:05,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:05,613 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:05,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177596356] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:05,614 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:05,614 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 19:22:05,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574430045] [2021-06-12 19:22:05,614 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:22:05,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:05,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:22:05,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:22:05,614 INFO L87 Difference]: Start difference. First operand 112 states and 227 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:22:05,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:05,823 INFO L93 Difference]: Finished difference Result 133 states and 263 transitions. [2021-06-12 19:22:05,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:22:05,823 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-12 19:22:05,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:05,823 INFO L225 Difference]: With dead ends: 133 [2021-06-12 19:22:05,823 INFO L226 Difference]: Without dead ends: 126 [2021-06-12 19:22:05,824 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 251.9ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:22:05,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-06-12 19:22:05,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 109. [2021-06-12 19:22:05,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.037037037037037) internal successors, (220), 108 states have internal predecessors, (220), 0 states have call successors, (0), 0 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 19:22:05,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 220 transitions. [2021-06-12 19:22:05,825 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 220 transitions. Word has length 19 [2021-06-12 19:22:05,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:05,825 INFO L482 AbstractCegarLoop]: Abstraction has 109 states and 220 transitions. [2021-06-12 19:22:05,825 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:22:05,825 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 220 transitions. [2021-06-12 19:22:05,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:22:05,825 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:05,825 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:06,041 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:06,041 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:06,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:06,041 INFO L82 PathProgramCache]: Analyzing trace with hash -1598555310, now seen corresponding path program 123 times [2021-06-12 19:22:06,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:06,042 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155256559] [2021-06-12 19:22:06,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:06,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:06,117 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:06,117 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:06,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155256559] [2021-06-12 19:22:06,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155256559] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:06,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051995141] [2021-06-12 19:22:06,117 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 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:06,139 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 19:22:06,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:22:06,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:22:06,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:06,331 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:06,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051995141] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:06,331 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:06,331 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 19:22:06,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972414453] [2021-06-12 19:22:06,331 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:22:06,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:06,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:22:06,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:22:06,332 INFO L87 Difference]: Start difference. First operand 109 states and 220 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:22:06,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:06,483 INFO L93 Difference]: Finished difference Result 128 states and 252 transitions. [2021-06-12 19:22:06,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:22:06,483 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-12 19:22:06,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:06,484 INFO L225 Difference]: With dead ends: 128 [2021-06-12 19:22:06,484 INFO L226 Difference]: Without dead ends: 121 [2021-06-12 19:22:06,484 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 249.9ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:22:06,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-06-12 19:22:06,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 112. [2021-06-12 19:22:06,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.054054054054054) internal successors, (228), 111 states have internal predecessors, (228), 0 states have call successors, (0), 0 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 19:22:06,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 228 transitions. [2021-06-12 19:22:06,485 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 228 transitions. Word has length 19 [2021-06-12 19:22:06,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:06,485 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 228 transitions. [2021-06-12 19:22:06,485 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:22:06,485 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 228 transitions. [2021-06-12 19:22:06,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:22:06,485 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:06,485 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:06,686 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:06,686 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:06,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:06,686 INFO L82 PathProgramCache]: Analyzing trace with hash 480738518, now seen corresponding path program 124 times [2021-06-12 19:22:06,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:06,686 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501618500] [2021-06-12 19:22:06,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:06,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:06,765 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:06,765 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:06,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501618500] [2021-06-12 19:22:06,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501618500] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:06,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855655282] [2021-06-12 19:22:06,766 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 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:06,785 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:22:06,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:22:06,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:22:06,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:06,988 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:06,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855655282] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:06,988 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:06,988 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 19:22:06,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591274673] [2021-06-12 19:22:06,989 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:22:06,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:06,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:22:06,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:22:06,989 INFO L87 Difference]: Start difference. First operand 112 states and 228 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:22:07,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:07,223 INFO L93 Difference]: Finished difference Result 151 states and 293 transitions. [2021-06-12 19:22:07,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:22:07,223 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-12 19:22:07,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:07,224 INFO L225 Difference]: With dead ends: 151 [2021-06-12 19:22:07,224 INFO L226 Difference]: Without dead ends: 144 [2021-06-12 19:22:07,224 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 279.1ms TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:22:07,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-06-12 19:22:07,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 113. [2021-06-12 19:22:07,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.0714285714285716) internal successors, (232), 112 states have internal predecessors, (232), 0 states have call successors, (0), 0 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 19:22:07,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 232 transitions. [2021-06-12 19:22:07,225 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 232 transitions. Word has length 19 [2021-06-12 19:22:07,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:07,225 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 232 transitions. [2021-06-12 19:22:07,225 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:22:07,225 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 232 transitions. [2021-06-12 19:22:07,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:22:07,225 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:07,225 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:07,441 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable132 [2021-06-12 19:22:07,441 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:07,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:07,441 INFO L82 PathProgramCache]: Analyzing trace with hash 496199314, now seen corresponding path program 125 times [2021-06-12 19:22:07,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:07,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922571996] [2021-06-12 19:22:07,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:07,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:07,528 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:07,528 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:07,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922571996] [2021-06-12 19:22:07,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922571996] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:07,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147724411] [2021-06-12 19:22:07,528 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 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:07,549 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:22:07,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:22:07,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:22:07,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:07,742 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:07,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147724411] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:07,742 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:07,742 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 19:22:07,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823734973] [2021-06-12 19:22:07,742 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:22:07,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:07,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:22:07,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:22:07,743 INFO L87 Difference]: Start difference. First operand 113 states and 232 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:22:07,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:07,982 INFO L93 Difference]: Finished difference Result 138 states and 275 transitions. [2021-06-12 19:22:07,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:22:07,982 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-12 19:22:07,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:07,983 INFO L225 Difference]: With dead ends: 138 [2021-06-12 19:22:07,983 INFO L226 Difference]: Without dead ends: 131 [2021-06-12 19:22:07,983 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 275.2ms TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:22:07,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-06-12 19:22:07,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 111. [2021-06-12 19:22:07,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.0454545454545454) internal successors, (225), 110 states have internal predecessors, (225), 0 states have call successors, (0), 0 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 19:22:07,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 225 transitions. [2021-06-12 19:22:07,984 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 225 transitions. Word has length 19 [2021-06-12 19:22:07,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:07,984 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 225 transitions. [2021-06-12 19:22:07,984 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:22:07,984 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 225 transitions. [2021-06-12 19:22:07,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:22:07,984 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:07,984 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:08,189 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-06-12 19:22:08,189 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:08,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:08,189 INFO L82 PathProgramCache]: Analyzing trace with hash -1668058018, now seen corresponding path program 126 times [2021-06-12 19:22:08,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:08,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134266260] [2021-06-12 19:22:08,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:08,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:08,282 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:08,283 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:08,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134266260] [2021-06-12 19:22:08,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134266260] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:08,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082172857] [2021-06-12 19:22:08,283 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 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:08,302 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:22:08,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:22:08,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:22:08,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:08,495 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:08,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082172857] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:08,495 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:08,495 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 19:22:08,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607828556] [2021-06-12 19:22:08,495 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:22:08,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:08,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:22:08,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:22:08,496 INFO L87 Difference]: Start difference. First operand 111 states and 225 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:22:08,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:08,718 INFO L93 Difference]: Finished difference Result 148 states and 289 transitions. [2021-06-12 19:22:08,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:22:08,718 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-12 19:22:08,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:08,719 INFO L225 Difference]: With dead ends: 148 [2021-06-12 19:22:08,719 INFO L226 Difference]: Without dead ends: 141 [2021-06-12 19:22:08,719 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 277.0ms TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:22:08,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-06-12 19:22:08,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 113. [2021-06-12 19:22:08,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.0714285714285716) internal successors, (232), 112 states have internal predecessors, (232), 0 states have call successors, (0), 0 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 19:22:08,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 232 transitions. [2021-06-12 19:22:08,720 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 232 transitions. Word has length 19 [2021-06-12 19:22:08,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:08,720 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 232 transitions. [2021-06-12 19:22:08,720 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:22:08,720 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 232 transitions. [2021-06-12 19:22:08,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:22:08,720 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:08,720 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:08,921 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-06-12 19:22:08,921 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:08,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:08,921 INFO L82 PathProgramCache]: Analyzing trace with hash -1652597222, now seen corresponding path program 127 times [2021-06-12 19:22:08,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:08,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806476013] [2021-06-12 19:22:08,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:08,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:09,008 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:09,008 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:09,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806476013] [2021-06-12 19:22:09,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806476013] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:09,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427203558] [2021-06-12 19:22:09,008 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:09,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:09,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:22:09,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:09,214 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:09,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427203558] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:09,215 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:09,215 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 19:22:09,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101717201] [2021-06-12 19:22:09,215 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:22:09,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:09,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:22:09,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:22:09,215 INFO L87 Difference]: Start difference. First operand 113 states and 232 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:22:09,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:09,428 INFO L93 Difference]: Finished difference Result 154 states and 300 transitions. [2021-06-12 19:22:09,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:22:09,428 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-12 19:22:09,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:09,428 INFO L225 Difference]: With dead ends: 154 [2021-06-12 19:22:09,428 INFO L226 Difference]: Without dead ends: 147 [2021-06-12 19:22:09,429 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 268.1ms TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:22:09,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-06-12 19:22:09,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 112. [2021-06-12 19:22:09,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.054054054054054) internal successors, (228), 111 states have internal predecessors, (228), 0 states have call successors, (0), 0 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 19:22:09,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 228 transitions. [2021-06-12 19:22:09,430 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 228 transitions. Word has length 19 [2021-06-12 19:22:09,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:09,430 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 228 transitions. [2021-06-12 19:22:09,430 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:22:09,430 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 228 transitions. [2021-06-12 19:22:09,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:22:09,430 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:09,430 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:09,640 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-06-12 19:22:09,641 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:09,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:09,641 INFO L82 PathProgramCache]: Analyzing trace with hash -1081142416, now seen corresponding path program 128 times [2021-06-12 19:22:09,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:09,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944284755] [2021-06-12 19:22:09,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:09,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:09,726 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:09,726 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:09,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944284755] [2021-06-12 19:22:09,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944284755] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:09,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934865741] [2021-06-12 19:22:09,726 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 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:09,746 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:22:09,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:22:09,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:22:09,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:09,943 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:09,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934865741] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:09,943 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:09,944 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 19:22:09,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348514399] [2021-06-12 19:22:09,944 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:22:09,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:09,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:22:09,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:22:09,944 INFO L87 Difference]: Start difference. First operand 112 states and 228 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:22:10,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:10,144 INFO L93 Difference]: Finished difference Result 131 states and 259 transitions. [2021-06-12 19:22:10,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:22:10,145 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-12 19:22:10,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:10,145 INFO L225 Difference]: With dead ends: 131 [2021-06-12 19:22:10,145 INFO L226 Difference]: Without dead ends: 124 [2021-06-12 19:22:10,145 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 266.0ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:22:10,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-06-12 19:22:10,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 110. [2021-06-12 19:22:10,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.0458715596330275) internal successors, (223), 109 states have internal predecessors, (223), 0 states have call successors, (0), 0 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 19:22:10,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 223 transitions. [2021-06-12 19:22:10,151 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 223 transitions. Word has length 19 [2021-06-12 19:22:10,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:10,151 INFO L482 AbstractCegarLoop]: Abstraction has 110 states and 223 transitions. [2021-06-12 19:22:10,151 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:22:10,151 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 223 transitions. [2021-06-12 19:22:10,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:22:10,151 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:10,151 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:10,367 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-06-12 19:22:10,367 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:10,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:10,367 INFO L82 PathProgramCache]: Analyzing trace with hash 1532817690, now seen corresponding path program 129 times [2021-06-12 19:22:10,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:10,367 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654538553] [2021-06-12 19:22:10,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:10,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:10,463 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:10,464 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:10,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654538553] [2021-06-12 19:22:10,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654538553] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:10,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588536327] [2021-06-12 19:22:10,464 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 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:10,485 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 19:22:10,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:22:10,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:22:10,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:10,681 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:10,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [588536327] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:10,681 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:10,681 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 19:22:10,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632911691] [2021-06-12 19:22:10,682 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:22:10,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:10,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:22:10,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:22:10,682 INFO L87 Difference]: Start difference. First operand 110 states and 223 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:22:10,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:10,909 INFO L93 Difference]: Finished difference Result 165 states and 320 transitions. [2021-06-12 19:22:10,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:22:10,909 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-12 19:22:10,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:10,910 INFO L225 Difference]: With dead ends: 165 [2021-06-12 19:22:10,910 INFO L226 Difference]: Without dead ends: 158 [2021-06-12 19:22:10,910 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 312.7ms TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:22:10,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-06-12 19:22:10,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 113. [2021-06-12 19:22:10,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.0892857142857144) internal successors, (234), 112 states have internal predecessors, (234), 0 states have call successors, (0), 0 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 19:22:10,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 234 transitions. [2021-06-12 19:22:10,911 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 234 transitions. Word has length 19 [2021-06-12 19:22:10,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:10,911 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 234 transitions. [2021-06-12 19:22:10,911 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:22:10,911 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 234 transitions. [2021-06-12 19:22:10,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:22:10,911 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:10,911 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:11,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2021-06-12 19:22:11,112 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:11,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:11,112 INFO L82 PathProgramCache]: Analyzing trace with hash 1548278486, now seen corresponding path program 130 times [2021-06-12 19:22:11,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:11,112 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340945129] [2021-06-12 19:22:11,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:11,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:11,192 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:11,192 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:11,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340945129] [2021-06-12 19:22:11,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340945129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:11,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785783280] [2021-06-12 19:22:11,193 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 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:11,218 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:22:11,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:22:11,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:22:11,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:11,409 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:11,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785783280] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:11,409 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:11,409 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 19:22:11,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838431601] [2021-06-12 19:22:11,410 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:22:11,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:11,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:22:11,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:22:11,410 INFO L87 Difference]: Start difference. First operand 113 states and 234 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:22:11,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:11,714 INFO L93 Difference]: Finished difference Result 171 states and 331 transitions. [2021-06-12 19:22:11,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:22:11,715 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-12 19:22:11,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:11,715 INFO L225 Difference]: With dead ends: 171 [2021-06-12 19:22:11,715 INFO L226 Difference]: Without dead ends: 164 [2021-06-12 19:22:11,715 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 284.4ms TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:22:11,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-06-12 19:22:11,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 112. [2021-06-12 19:22:11,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.0720720720720722) internal successors, (230), 111 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 19:22:11,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 230 transitions. [2021-06-12 19:22:11,717 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 230 transitions. Word has length 19 [2021-06-12 19:22:11,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:11,717 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 230 transitions. [2021-06-12 19:22:11,717 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:22:11,717 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 230 transitions. [2021-06-12 19:22:11,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:22:11,717 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:11,717 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:11,918 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-06-12 19:22:11,918 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:11,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:11,918 INFO L82 PathProgramCache]: Analyzing trace with hash 2119733292, now seen corresponding path program 131 times [2021-06-12 19:22:11,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:11,918 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366518727] [2021-06-12 19:22:11,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:11,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:11,995 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:11,995 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:11,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366518727] [2021-06-12 19:22:11,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366518727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:11,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729923451] [2021-06-12 19:22:11,996 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 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:12,016 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 19:22:12,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:22:12,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:22:12,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:12,202 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:12,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729923451] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:12,203 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:12,203 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 19:22:12,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587166848] [2021-06-12 19:22:12,203 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:22:12,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:12,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:22:12,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:22:12,203 INFO L87 Difference]: Start difference. First operand 112 states and 230 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:22:12,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:12,408 INFO L93 Difference]: Finished difference Result 150 states and 293 transitions. [2021-06-12 19:22:12,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:22:12,408 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-12 19:22:12,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:12,408 INFO L225 Difference]: With dead ends: 150 [2021-06-12 19:22:12,409 INFO L226 Difference]: Without dead ends: 143 [2021-06-12 19:22:12,409 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 243.5ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:22:12,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-06-12 19:22:12,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 111. [2021-06-12 19:22:12,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.0636363636363635) internal successors, (227), 110 states have internal predecessors, (227), 0 states have call successors, (0), 0 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 19:22:12,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 227 transitions. [2021-06-12 19:22:12,410 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 227 transitions. Word has length 19 [2021-06-12 19:22:12,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:12,410 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 227 transitions. [2021-06-12 19:22:12,410 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:22:12,410 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 227 transitions. [2021-06-12 19:22:12,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:22:12,410 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:12,410 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:12,611 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2021-06-12 19:22:12,611 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:12,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:12,611 INFO L82 PathProgramCache]: Analyzing trace with hash -737818470, now seen corresponding path program 132 times [2021-06-12 19:22:12,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:12,611 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788467314] [2021-06-12 19:22:12,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:12,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:12,714 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:12,714 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:12,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788467314] [2021-06-12 19:22:12,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788467314] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:12,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611378853] [2021-06-12 19:22:12,715 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 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:12,735 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 19:22:12,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:22:12,736 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 19:22:12,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:12,921 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:12,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611378853] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:12,922 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:12,922 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-12 19:22:12,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450462566] [2021-06-12 19:22:12,922 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 19:22:12,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:12,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 19:22:12,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:22:12,922 INFO L87 Difference]: Start difference. First operand 111 states and 227 transitions. Second operand has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 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 19:22:13,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:13,496 INFO L93 Difference]: Finished difference Result 197 states and 356 transitions. [2021-06-12 19:22:13,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 19:22:13,497 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 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 19 [2021-06-12 19:22:13,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:13,497 INFO L225 Difference]: With dead ends: 197 [2021-06-12 19:22:13,497 INFO L226 Difference]: Without dead ends: 156 [2021-06-12 19:22:13,497 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 620.1ms TimeCoverageRelationStatistics Valid=204, Invalid=918, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 19:22:13,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-06-12 19:22:13,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 116. [2021-06-12 19:22:13,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 2.0521739130434784) internal successors, (236), 115 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 19:22:13,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 236 transitions. [2021-06-12 19:22:13,499 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 236 transitions. Word has length 19 [2021-06-12 19:22:13,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:13,499 INFO L482 AbstractCegarLoop]: Abstraction has 116 states and 236 transitions. [2021-06-12 19:22:13,499 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 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 19:22:13,499 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 236 transitions. [2021-06-12 19:22:13,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:22:13,499 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:13,499 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:13,699 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:13,699 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:13,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:13,700 INFO L82 PathProgramCache]: Analyzing trace with hash -1120538858, now seen corresponding path program 133 times [2021-06-12 19:22:13,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:13,700 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786224104] [2021-06-12 19:22:13,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:13,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:13,774 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:13,775 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:13,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786224104] [2021-06-12 19:22:13,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786224104] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:13,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065866831] [2021-06-12 19:22:13,775 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 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:13,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:13,794 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 19:22:13,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:13,980 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:13,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065866831] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:13,980 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:13,980 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-12 19:22:13,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725916687] [2021-06-12 19:22:13,980 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 19:22:13,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:13,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 19:22:13,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:22:13,981 INFO L87 Difference]: Start difference. First operand 116 states and 236 transitions. Second operand has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 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 19:22:14,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:14,355 INFO L93 Difference]: Finished difference Result 160 states and 304 transitions. [2021-06-12 19:22:14,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 19:22:14,356 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 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 19 [2021-06-12 19:22:14,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:14,356 INFO L225 Difference]: With dead ends: 160 [2021-06-12 19:22:14,356 INFO L226 Difference]: Without dead ends: 153 [2021-06-12 19:22:14,356 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 460.2ms TimeCoverageRelationStatistics Valid=153, Invalid=717, Unknown=0, NotChecked=0, Total=870 [2021-06-12 19:22:14,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-06-12 19:22:14,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 112. [2021-06-12 19:22:14,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.054054054054054) internal successors, (228), 111 states have internal predecessors, (228), 0 states have call successors, (0), 0 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 19:22:14,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 228 transitions. [2021-06-12 19:22:14,357 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 228 transitions. Word has length 19 [2021-06-12 19:22:14,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:14,358 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 228 transitions. [2021-06-12 19:22:14,358 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 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 19:22:14,358 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 228 transitions. [2021-06-12 19:22:14,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:22:14,358 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:14,358 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:14,558 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,142 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:14,558 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:14,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:14,559 INFO L82 PathProgramCache]: Analyzing trace with hash 958754970, now seen corresponding path program 134 times [2021-06-12 19:22:14,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:14,559 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52330482] [2021-06-12 19:22:14,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:14,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:14,636 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:14,636 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:14,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52330482] [2021-06-12 19:22:14,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52330482] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:14,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356367314] [2021-06-12 19:22:14,636 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 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:14,656 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:22:14,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:22:14,657 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 19:22:14,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:14,860 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:14,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356367314] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:14,860 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:14,860 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-12 19:22:14,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603692383] [2021-06-12 19:22:14,860 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 19:22:14,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:14,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 19:22:14,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:22:14,861 INFO L87 Difference]: Start difference. First operand 112 states and 228 transitions. Second operand has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 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 19:22:15,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:15,546 INFO L93 Difference]: Finished difference Result 223 states and 409 transitions. [2021-06-12 19:22:15,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 19:22:15,546 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 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 19 [2021-06-12 19:22:15,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:15,546 INFO L225 Difference]: With dead ends: 223 [2021-06-12 19:22:15,546 INFO L226 Difference]: Without dead ends: 216 [2021-06-12 19:22:15,546 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 728.4ms TimeCoverageRelationStatistics Valid=270, Invalid=1212, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 19:22:15,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-06-12 19:22:15,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 113. [2021-06-12 19:22:15,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.0714285714285716) internal successors, (232), 112 states have internal predecessors, (232), 0 states have call successors, (0), 0 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 19:22:15,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 232 transitions. [2021-06-12 19:22:15,548 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 232 transitions. Word has length 19 [2021-06-12 19:22:15,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:15,548 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 232 transitions. [2021-06-12 19:22:15,548 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 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 19:22:15,548 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 232 transitions. [2021-06-12 19:22:15,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:22:15,548 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:15,548 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:15,749 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,143 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:15,749 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:15,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:15,749 INFO L82 PathProgramCache]: Analyzing trace with hash 974215766, now seen corresponding path program 135 times [2021-06-12 19:22:15,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:15,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137562365] [2021-06-12 19:22:15,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:15,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:15,842 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:15,842 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:15,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137562365] [2021-06-12 19:22:15,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137562365] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:15,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655225613] [2021-06-12 19:22:15,843 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 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:15,873 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 19:22:15,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:22:15,874 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 19:22:15,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:16,073 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:16,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655225613] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:16,074 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:16,074 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-12 19:22:16,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103555644] [2021-06-12 19:22:16,074 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 19:22:16,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:16,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 19:22:16,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:22:16,074 INFO L87 Difference]: Start difference. First operand 113 states and 232 transitions. Second operand has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 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 19:22:16,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:16,864 INFO L93 Difference]: Finished difference Result 214 states and 397 transitions. [2021-06-12 19:22:16,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 19:22:16,864 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 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 19 [2021-06-12 19:22:16,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:16,864 INFO L225 Difference]: With dead ends: 214 [2021-06-12 19:22:16,864 INFO L226 Difference]: Without dead ends: 207 [2021-06-12 19:22:16,865 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 744.5ms TimeCoverageRelationStatistics Valid=272, Invalid=1450, Unknown=0, NotChecked=0, Total=1722 [2021-06-12 19:22:16,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-06-12 19:22:16,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 111. [2021-06-12 19:22:16,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.0454545454545454) internal successors, (225), 110 states have internal predecessors, (225), 0 states have call successors, (0), 0 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 19:22:16,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 225 transitions. [2021-06-12 19:22:16,866 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 225 transitions. Word has length 19 [2021-06-12 19:22:16,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:16,866 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 225 transitions. [2021-06-12 19:22:16,866 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 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 19:22:16,866 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 225 transitions. [2021-06-12 19:22:16,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:22:16,866 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:16,866 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:17,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:17,081 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:17,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:17,081 INFO L82 PathProgramCache]: Analyzing trace with hash 1581877714, now seen corresponding path program 136 times [2021-06-12 19:22:17,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:17,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663348533] [2021-06-12 19:22:17,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:17,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:17,157 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:17,157 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:17,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663348533] [2021-06-12 19:22:17,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663348533] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:17,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369751555] [2021-06-12 19:22:17,158 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 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:17,177 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:22:17,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:22:17,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:22:17,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:17,365 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:17,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369751555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:17,366 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:17,366 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 19:22:17,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533451240] [2021-06-12 19:22:17,366 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:22:17,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:17,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:22:17,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:22:17,366 INFO L87 Difference]: Start difference. First operand 111 states and 225 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:22:17,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:17,532 INFO L93 Difference]: Finished difference Result 137 states and 269 transitions. [2021-06-12 19:22:17,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:22:17,532 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-12 19:22:17,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:17,532 INFO L225 Difference]: With dead ends: 137 [2021-06-12 19:22:17,532 INFO L226 Difference]: Without dead ends: 130 [2021-06-12 19:22:17,533 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 259.7ms TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:22:17,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-06-12 19:22:17,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 111. [2021-06-12 19:22:17,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.0454545454545454) internal successors, (225), 110 states have internal predecessors, (225), 0 states have call successors, (0), 0 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 19:22:17,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 225 transitions. [2021-06-12 19:22:17,534 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 225 transitions. Word has length 19 [2021-06-12 19:22:17,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:17,534 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 225 transitions. [2021-06-12 19:22:17,534 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:22:17,534 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 225 transitions. [2021-06-12 19:22:17,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:22:17,534 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:17,534 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:17,734 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-06-12 19:22:17,735 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:17,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:17,735 INFO L82 PathProgramCache]: Analyzing trace with hash 811172182, now seen corresponding path program 137 times [2021-06-12 19:22:17,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:17,735 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108525360] [2021-06-12 19:22:17,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:17,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:17,815 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:17,815 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:17,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108525360] [2021-06-12 19:22:17,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108525360] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:17,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55842195] [2021-06-12 19:22:17,815 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 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:17,845 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:22:17,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:22:17,845 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 19:22:17,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:17,997 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:17,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55842195] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:17,997 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:17,997 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 19:22:17,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157432510] [2021-06-12 19:22:17,997 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:22:17,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:17,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:22:17,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:22:17,998 INFO L87 Difference]: Start difference. First operand 111 states and 225 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:18,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:18,693 INFO L93 Difference]: Finished difference Result 235 states and 445 transitions. [2021-06-12 19:22:18,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 19:22:18,694 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 19:22:18,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:18,694 INFO L225 Difference]: With dead ends: 235 [2021-06-12 19:22:18,694 INFO L226 Difference]: Without dead ends: 228 [2021-06-12 19:22:18,694 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 562.2ms TimeCoverageRelationStatistics Valid=177, Invalid=945, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 19:22:18,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-06-12 19:22:18,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 115. [2021-06-12 19:22:18,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.0964912280701755) internal successors, (239), 114 states have internal predecessors, (239), 0 states have call successors, (0), 0 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 19:22:18,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 239 transitions. [2021-06-12 19:22:18,696 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 239 transitions. Word has length 19 [2021-06-12 19:22:18,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:18,696 INFO L482 AbstractCegarLoop]: Abstraction has 115 states and 239 transitions. [2021-06-12 19:22:18,696 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:18,696 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 239 transitions. [2021-06-12 19:22:18,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:22:18,696 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:18,696 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:18,896 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-06-12 19:22:18,897 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:18,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:18,897 INFO L82 PathProgramCache]: Analyzing trace with hash 826632978, now seen corresponding path program 138 times [2021-06-12 19:22:18,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:18,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810726702] [2021-06-12 19:22:18,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:18,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:18,974 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:18,974 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:18,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810726702] [2021-06-12 19:22:18,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810726702] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:18,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252730375] [2021-06-12 19:22:18,974 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 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:18,994 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 19:22:18,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:22:18,995 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 19:22:18,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:19,144 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:19,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252730375] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:19,145 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:19,145 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 19:22:19,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014767745] [2021-06-12 19:22:19,145 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:22:19,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:19,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:22:19,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:22:19,145 INFO L87 Difference]: Start difference. First operand 115 states and 239 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:19,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:19,790 INFO L93 Difference]: Finished difference Result 235 states and 448 transitions. [2021-06-12 19:22:19,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 19:22:19,790 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 19:22:19,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:19,791 INFO L225 Difference]: With dead ends: 235 [2021-06-12 19:22:19,791 INFO L226 Difference]: Without dead ends: 228 [2021-06-12 19:22:19,791 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 546.5ms TimeCoverageRelationStatistics Valid=193, Invalid=929, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 19:22:19,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-06-12 19:22:19,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 114. [2021-06-12 19:22:19,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.079646017699115) internal successors, (235), 113 states have internal predecessors, (235), 0 states have call successors, (0), 0 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 19:22:19,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 235 transitions. [2021-06-12 19:22:19,793 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 235 transitions. Word has length 19 [2021-06-12 19:22:19,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:19,793 INFO L482 AbstractCegarLoop]: Abstraction has 114 states and 235 transitions. [2021-06-12 19:22:19,793 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:19,793 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 235 transitions. [2021-06-12 19:22:19,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:22:19,793 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:19,793 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:20,009 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-06-12 19:22:20,009 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:20,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:20,010 INFO L82 PathProgramCache]: Analyzing trace with hash 1398087784, now seen corresponding path program 139 times [2021-06-12 19:22:20,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:20,010 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497125670] [2021-06-12 19:22:20,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:20,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:20,098 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:20,099 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:20,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497125670] [2021-06-12 19:22:20,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497125670] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:20,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808570251] [2021-06-12 19:22:20,099 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 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:20,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:20,119 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 19:22:20,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:20,297 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:20,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808570251] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:20,297 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:20,297 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 19:22:20,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519978731] [2021-06-12 19:22:20,298 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:22:20,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:20,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:22:20,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:22:20,298 INFO L87 Difference]: Start difference. First operand 114 states and 235 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:20,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:20,916 INFO L93 Difference]: Finished difference Result 201 states and 382 transitions. [2021-06-12 19:22:20,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 19:22:20,916 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 19:22:20,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:20,916 INFO L225 Difference]: With dead ends: 201 [2021-06-12 19:22:20,916 INFO L226 Difference]: Without dead ends: 194 [2021-06-12 19:22:20,917 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 645.3ms TimeCoverageRelationStatistics Valid=187, Invalid=935, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 19:22:20,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-06-12 19:22:20,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 113. [2021-06-12 19:22:20,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.0714285714285716) internal successors, (232), 112 states have internal predecessors, (232), 0 states have call successors, (0), 0 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 19:22:20,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 232 transitions. [2021-06-12 19:22:20,918 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 232 transitions. Word has length 19 [2021-06-12 19:22:20,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:20,918 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 232 transitions. [2021-06-12 19:22:20,918 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:20,918 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 232 transitions. [2021-06-12 19:22:20,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:22:20,918 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:20,918 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:21,119 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-06-12 19:22:21,119 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:21,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:21,119 INFO L82 PathProgramCache]: Analyzing trace with hash -1459463978, now seen corresponding path program 140 times [2021-06-12 19:22:21,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:21,119 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614957948] [2021-06-12 19:22:21,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:21,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:21,194 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:21,194 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:21,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614957948] [2021-06-12 19:22:21,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614957948] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:21,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64842527] [2021-06-12 19:22:21,194 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 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:21,214 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:22:21,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:22:21,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:22:21,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:21,404 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:21,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64842527] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:21,404 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:21,404 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 19:22:21,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027285845] [2021-06-12 19:22:21,405 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:22:21,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:21,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:22:21,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:22:21,405 INFO L87 Difference]: Start difference. First operand 113 states and 232 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:21,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:21,634 INFO L93 Difference]: Finished difference Result 157 states and 306 transitions. [2021-06-12 19:22:21,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:22:21,634 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 19:22:21,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:21,635 INFO L225 Difference]: With dead ends: 157 [2021-06-12 19:22:21,635 INFO L226 Difference]: Without dead ends: 150 [2021-06-12 19:22:21,635 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 258.3ms TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:22:21,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-06-12 19:22:21,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 113. [2021-06-12 19:22:21,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.0714285714285716) internal successors, (232), 112 states have internal predecessors, (232), 0 states have call successors, (0), 0 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 19:22:21,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 232 transitions. [2021-06-12 19:22:21,636 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 232 transitions. Word has length 19 [2021-06-12 19:22:21,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:21,636 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 232 transitions. [2021-06-12 19:22:21,636 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:21,636 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 232 transitions. [2021-06-12 19:22:21,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:22:21,637 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:21,637 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:21,837 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2021-06-12 19:22:21,837 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:21,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:21,838 INFO L82 PathProgramCache]: Analyzing trace with hash -1842184366, now seen corresponding path program 141 times [2021-06-12 19:22:21,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:21,838 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591068244] [2021-06-12 19:22:21,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:21,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:21,930 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:21,930 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:21,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591068244] [2021-06-12 19:22:21,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591068244] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:21,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599037259] [2021-06-12 19:22:21,930 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 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:21,951 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 19:22:21,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:22:21,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:22:21,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:22,160 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:22,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1599037259] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:22,160 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:22,160 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 19:22:22,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134393295] [2021-06-12 19:22:22,160 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:22:22,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:22,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:22:22,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:22:22,161 INFO L87 Difference]: Start difference. First operand 113 states and 232 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:22,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:22,356 INFO L93 Difference]: Finished difference Result 161 states and 314 transitions. [2021-06-12 19:22:22,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:22:22,357 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 19:22:22,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:22,357 INFO L225 Difference]: With dead ends: 161 [2021-06-12 19:22:22,357 INFO L226 Difference]: Without dead ends: 154 [2021-06-12 19:22:22,357 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 274.9ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:22:22,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-06-12 19:22:22,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 114. [2021-06-12 19:22:22,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.079646017699115) internal successors, (235), 113 states have internal predecessors, (235), 0 states have call successors, (0), 0 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 19:22:22,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 235 transitions. [2021-06-12 19:22:22,358 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 235 transitions. Word has length 19 [2021-06-12 19:22:22,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:22,359 INFO L482 AbstractCegarLoop]: Abstraction has 114 states and 235 transitions. [2021-06-12 19:22:22,359 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:22,359 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 235 transitions. [2021-06-12 19:22:22,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:22:22,359 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:22,360 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:22,568 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2021-06-12 19:22:22,569 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:22,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:22,569 INFO L82 PathProgramCache]: Analyzing trace with hash 237109462, now seen corresponding path program 142 times [2021-06-12 19:22:22,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:22,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909155881] [2021-06-12 19:22:22,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:22,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:22,648 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:22,648 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:22,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909155881] [2021-06-12 19:22:22,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909155881] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:22,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422789196] [2021-06-12 19:22:22,648 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 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:22,667 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:22:22,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:22:22,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:22:22,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:22,853 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:22,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1422789196] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:22,854 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:22,854 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 19:22:22,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446614477] [2021-06-12 19:22:22,854 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:22:22,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:22,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:22:22,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:22:22,854 INFO L87 Difference]: Start difference. First operand 114 states and 235 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:23,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:23,162 INFO L93 Difference]: Finished difference Result 183 states and 354 transitions. [2021-06-12 19:22:23,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:22:23,162 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 19:22:23,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:23,162 INFO L225 Difference]: With dead ends: 183 [2021-06-12 19:22:23,162 INFO L226 Difference]: Without dead ends: 176 [2021-06-12 19:22:23,163 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 287.9ms TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:22:23,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-06-12 19:22:23,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 115. [2021-06-12 19:22:23,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.0964912280701755) internal successors, (239), 114 states have internal predecessors, (239), 0 states have call successors, (0), 0 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 19:22:23,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 239 transitions. [2021-06-12 19:22:23,164 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 239 transitions. Word has length 19 [2021-06-12 19:22:23,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:23,164 INFO L482 AbstractCegarLoop]: Abstraction has 115 states and 239 transitions. [2021-06-12 19:22:23,164 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:23,164 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 239 transitions. [2021-06-12 19:22:23,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:22:23,164 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:23,164 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:23,368 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:23,369 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:23,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:23,369 INFO L82 PathProgramCache]: Analyzing trace with hash 252570258, now seen corresponding path program 143 times [2021-06-12 19:22:23,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:23,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377837013] [2021-06-12 19:22:23,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:23,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:23,455 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:23,456 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:23,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377837013] [2021-06-12 19:22:23,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377837013] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:23,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027267540] [2021-06-12 19:22:23,456 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:23,476 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 19:22:23,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:22:23,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:22:23,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:23,655 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:23,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027267540] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:23,656 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:23,656 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 19:22:23,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856928129] [2021-06-12 19:22:23,656 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:22:23,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:23,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:22:23,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:22:23,656 INFO L87 Difference]: Start difference. First operand 115 states and 239 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:23,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:23,878 INFO L93 Difference]: Finished difference Result 170 states and 336 transitions. [2021-06-12 19:22:23,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:22:23,878 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 19:22:23,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:23,878 INFO L225 Difference]: With dead ends: 170 [2021-06-12 19:22:23,878 INFO L226 Difference]: Without dead ends: 163 [2021-06-12 19:22:23,878 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 289.2ms TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:22:23,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-06-12 19:22:23,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 113. [2021-06-12 19:22:23,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.0714285714285716) internal successors, (232), 112 states have internal predecessors, (232), 0 states have call successors, (0), 0 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 19:22:23,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 232 transitions. [2021-06-12 19:22:23,880 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 232 transitions. Word has length 19 [2021-06-12 19:22:23,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:23,880 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 232 transitions. [2021-06-12 19:22:23,880 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:23,880 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 232 transitions. [2021-06-12 19:22:23,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:22:23,880 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:23,880 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:24,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,152 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:24,081 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:24,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:24,081 INFO L82 PathProgramCache]: Analyzing trace with hash 860232206, now seen corresponding path program 144 times [2021-06-12 19:22:24,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:24,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476500257] [2021-06-12 19:22:24,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:24,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:24,156 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:24,156 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:24,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476500257] [2021-06-12 19:22:24,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476500257] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:24,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338844380] [2021-06-12 19:22:24,156 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 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:24,176 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:22:24,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:22:24,177 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 19:22:24,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:24,343 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:24,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338844380] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:24,343 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:24,343 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 19:22:24,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739922046] [2021-06-12 19:22:24,343 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:22:24,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:24,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:22:24,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:22:24,344 INFO L87 Difference]: Start difference. First operand 113 states and 232 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:25,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:25,033 INFO L93 Difference]: Finished difference Result 215 states and 406 transitions. [2021-06-12 19:22:25,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 19:22:25,033 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 19:22:25,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:25,033 INFO L225 Difference]: With dead ends: 215 [2021-06-12 19:22:25,033 INFO L226 Difference]: Without dead ends: 138 [2021-06-12 19:22:25,034 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 699.6ms TimeCoverageRelationStatistics Valid=260, Invalid=1146, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 19:22:25,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-06-12 19:22:25,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 104. [2021-06-12 19:22:25,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.0388349514563107) internal successors, (210), 103 states have internal predecessors, (210), 0 states have call successors, (0), 0 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 19:22:25,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 210 transitions. [2021-06-12 19:22:25,035 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 210 transitions. Word has length 19 [2021-06-12 19:22:25,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:25,035 INFO L482 AbstractCegarLoop]: Abstraction has 104 states and 210 transitions. [2021-06-12 19:22:25,035 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:25,035 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 210 transitions. [2021-06-12 19:22:25,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:22:25,035 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:25,035 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:25,235 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:25,236 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:25,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:25,236 INFO L82 PathProgramCache]: Analyzing trace with hash -829491834, now seen corresponding path program 145 times [2021-06-12 19:22:25,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:25,236 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561552705] [2021-06-12 19:22:25,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:25,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:25,309 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:25,309 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:25,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561552705] [2021-06-12 19:22:25,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561552705] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:25,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794344929] [2021-06-12 19:22:25,309 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 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:25,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:25,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:22:25,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:25,537 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:25,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794344929] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:25,538 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:25,538 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 19:22:25,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106260249] [2021-06-12 19:22:25,538 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:22:25,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:25,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:22:25,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:22:25,538 INFO L87 Difference]: Start difference. First operand 104 states and 210 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:25,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:25,735 INFO L93 Difference]: Finished difference Result 126 states and 247 transitions. [2021-06-12 19:22:25,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:22:25,735 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 19:22:25,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:25,735 INFO L225 Difference]: With dead ends: 126 [2021-06-12 19:22:25,735 INFO L226 Difference]: Without dead ends: 119 [2021-06-12 19:22:25,735 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 260.4ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:22:25,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-06-12 19:22:25,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 106. [2021-06-12 19:22:25,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.0476190476190474) internal successors, (215), 105 states have internal predecessors, (215), 0 states have call successors, (0), 0 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 19:22:25,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 215 transitions. [2021-06-12 19:22:25,736 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 215 transitions. Word has length 19 [2021-06-12 19:22:25,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:25,737 INFO L482 AbstractCegarLoop]: Abstraction has 106 states and 215 transitions. [2021-06-12 19:22:25,737 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:25,737 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 215 transitions. [2021-06-12 19:22:25,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:22:25,737 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:25,737 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:25,937 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:25,937 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:25,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:25,937 INFO L82 PathProgramCache]: Analyzing trace with hash 1249801994, now seen corresponding path program 146 times [2021-06-12 19:22:25,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:25,938 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905090835] [2021-06-12 19:22:25,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:25,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:26,019 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:26,019 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:26,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905090835] [2021-06-12 19:22:26,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905090835] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:26,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207145901] [2021-06-12 19:22:26,019 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 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:26,038 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:22:26,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:22:26,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:22:26,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:26,245 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:26,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [207145901] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:26,245 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:26,245 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 19:22:26,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155313520] [2021-06-12 19:22:26,245 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:22:26,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:26,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:22:26,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:22:26,246 INFO L87 Difference]: Start difference. First operand 106 states and 215 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:26,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:26,484 INFO L93 Difference]: Finished difference Result 149 states and 288 transitions. [2021-06-12 19:22:26,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:22:26,485 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 19:22:26,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:26,485 INFO L225 Difference]: With dead ends: 149 [2021-06-12 19:22:26,485 INFO L226 Difference]: Without dead ends: 142 [2021-06-12 19:22:26,485 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 272.0ms TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:22:26,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-06-12 19:22:26,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 107. [2021-06-12 19:22:26,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 2.0660377358490565) internal successors, (219), 106 states have internal predecessors, (219), 0 states have call successors, (0), 0 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 19:22:26,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 219 transitions. [2021-06-12 19:22:26,486 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 219 transitions. Word has length 19 [2021-06-12 19:22:26,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:26,486 INFO L482 AbstractCegarLoop]: Abstraction has 107 states and 219 transitions. [2021-06-12 19:22:26,486 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:26,486 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 219 transitions. [2021-06-12 19:22:26,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:22:26,487 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:26,487 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:26,687 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,155 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:26,687 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:26,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:26,687 INFO L82 PathProgramCache]: Analyzing trace with hash 1265262790, now seen corresponding path program 147 times [2021-06-12 19:22:26,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:26,687 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290458766] [2021-06-12 19:22:26,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:26,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:26,765 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:26,765 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:26,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290458766] [2021-06-12 19:22:26,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290458766] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:26,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409736700] [2021-06-12 19:22:26,765 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 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:26,785 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 19:22:26,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:22:26,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:22:26,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:26,978 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:26,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1409736700] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:26,978 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:26,978 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 19:22:26,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427682971] [2021-06-12 19:22:26,978 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:22:26,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:26,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:22:26,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:22:26,978 INFO L87 Difference]: Start difference. First operand 107 states and 219 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:27,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:27,194 INFO L93 Difference]: Finished difference Result 136 states and 270 transitions. [2021-06-12 19:22:27,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:22:27,194 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 19:22:27,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:27,195 INFO L225 Difference]: With dead ends: 136 [2021-06-12 19:22:27,195 INFO L226 Difference]: Without dead ends: 129 [2021-06-12 19:22:27,195 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 277.6ms TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:22:27,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-06-12 19:22:27,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 105. [2021-06-12 19:22:27,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.0384615384615383) internal successors, (212), 104 states have internal predecessors, (212), 0 states have call successors, (0), 0 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 19:22:27,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 212 transitions. [2021-06-12 19:22:27,196 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 212 transitions. Word has length 19 [2021-06-12 19:22:27,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:27,196 INFO L482 AbstractCegarLoop]: Abstraction has 105 states and 212 transitions. [2021-06-12 19:22:27,196 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:27,196 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 212 transitions. [2021-06-12 19:22:27,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:22:27,196 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:27,197 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:27,397 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:27,397 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:27,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:27,397 INFO L82 PathProgramCache]: Analyzing trace with hash -898994542, now seen corresponding path program 148 times [2021-06-12 19:22:27,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:27,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981761146] [2021-06-12 19:22:27,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:27,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:27,476 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:27,477 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:27,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981761146] [2021-06-12 19:22:27,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981761146] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:27,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182383770] [2021-06-12 19:22:27,477 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 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:27,496 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:22:27,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:22:27,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:22:27,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:27,687 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:27,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182383770] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:27,687 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:27,687 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 19:22:27,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453895247] [2021-06-12 19:22:27,687 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:22:27,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:27,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:22:27,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:22:27,688 INFO L87 Difference]: Start difference. First operand 105 states and 212 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:27,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:27,926 INFO L93 Difference]: Finished difference Result 146 states and 284 transitions. [2021-06-12 19:22:27,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:22:27,926 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 19:22:27,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:27,927 INFO L225 Difference]: With dead ends: 146 [2021-06-12 19:22:27,927 INFO L226 Difference]: Without dead ends: 139 [2021-06-12 19:22:27,927 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 273.7ms TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:22:27,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-06-12 19:22:27,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 107. [2021-06-12 19:22:27,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 2.0660377358490565) internal successors, (219), 106 states have internal predecessors, (219), 0 states have call successors, (0), 0 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 19:22:27,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 219 transitions. [2021-06-12 19:22:27,928 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 219 transitions. Word has length 19 [2021-06-12 19:22:27,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:27,928 INFO L482 AbstractCegarLoop]: Abstraction has 107 states and 219 transitions. [2021-06-12 19:22:27,928 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:27,928 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 219 transitions. [2021-06-12 19:22:27,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:22:27,928 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:27,928 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:28,129 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2021-06-12 19:22:28,129 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:28,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:28,130 INFO L82 PathProgramCache]: Analyzing trace with hash -883533746, now seen corresponding path program 149 times [2021-06-12 19:22:28,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:28,130 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970173392] [2021-06-12 19:22:28,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:28,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:28,206 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:28,206 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:28,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970173392] [2021-06-12 19:22:28,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970173392] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:28,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418494080] [2021-06-12 19:22:28,206 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 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:28,226 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:22:28,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:22:28,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:22:28,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:28,417 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:28,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418494080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:28,418 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:28,418 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 19:22:28,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985974492] [2021-06-12 19:22:28,418 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:22:28,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:28,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:22:28,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:22:28,418 INFO L87 Difference]: Start difference. First operand 107 states and 219 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:28,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:28,615 INFO L93 Difference]: Finished difference Result 152 states and 295 transitions. [2021-06-12 19:22:28,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:22:28,615 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 19:22:28,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:28,615 INFO L225 Difference]: With dead ends: 152 [2021-06-12 19:22:28,615 INFO L226 Difference]: Without dead ends: 145 [2021-06-12 19:22:28,615 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 265.7ms TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:22:28,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-06-12 19:22:28,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 106. [2021-06-12 19:22:28,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.0476190476190474) internal successors, (215), 105 states have internal predecessors, (215), 0 states have call successors, (0), 0 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 19:22:28,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 215 transitions. [2021-06-12 19:22:28,617 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 215 transitions. Word has length 19 [2021-06-12 19:22:28,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:28,617 INFO L482 AbstractCegarLoop]: Abstraction has 106 states and 215 transitions. [2021-06-12 19:22:28,617 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:28,617 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 215 transitions. [2021-06-12 19:22:28,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:22:28,617 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:28,617 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:28,817 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-06-12 19:22:28,818 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:28,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:28,818 INFO L82 PathProgramCache]: Analyzing trace with hash -312078940, now seen corresponding path program 150 times [2021-06-12 19:22:28,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:28,818 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942469240] [2021-06-12 19:22:28,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:28,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:28,901 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:28,901 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:28,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942469240] [2021-06-12 19:22:28,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942469240] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:28,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138290372] [2021-06-12 19:22:28,901 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 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:28,921 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:22:28,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:22:28,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:22:28,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:29,115 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:29,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138290372] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:29,115 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:29,115 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 19:22:29,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846522364] [2021-06-12 19:22:29,115 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:22:29,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:29,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:22:29,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:22:29,116 INFO L87 Difference]: Start difference. First operand 106 states and 215 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:29,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:29,245 INFO L93 Difference]: Finished difference Result 129 states and 254 transitions. [2021-06-12 19:22:29,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:22:29,246 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 19:22:29,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:29,246 INFO L225 Difference]: With dead ends: 129 [2021-06-12 19:22:29,246 INFO L226 Difference]: Without dead ends: 122 [2021-06-12 19:22:29,246 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 252.1ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:22:29,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-06-12 19:22:29,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 103. [2021-06-12 19:22:29,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.0392156862745097) internal successors, (208), 102 states have internal predecessors, (208), 0 states have call successors, (0), 0 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 19:22:29,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 208 transitions. [2021-06-12 19:22:29,247 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 208 transitions. Word has length 19 [2021-06-12 19:22:29,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:29,247 INFO L482 AbstractCegarLoop]: Abstraction has 103 states and 208 transitions. [2021-06-12 19:22:29,247 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:29,247 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 208 transitions. [2021-06-12 19:22:29,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:22:29,248 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:29,248 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:29,448 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-06-12 19:22:29,448 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:29,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:29,448 INFO L82 PathProgramCache]: Analyzing trace with hash 56306446, now seen corresponding path program 151 times [2021-06-12 19:22:29,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:29,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030871785] [2021-06-12 19:22:29,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:29,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:29,522 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:29,522 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:29,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030871785] [2021-06-12 19:22:29,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030871785] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:29,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897149729] [2021-06-12 19:22:29,522 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 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:29,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:29,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:22:29,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:29,734 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:29,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897149729] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:29,734 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:29,734 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 19:22:29,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339198331] [2021-06-12 19:22:29,735 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:22:29,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:29,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:22:29,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:22:29,735 INFO L87 Difference]: Start difference. First operand 103 states and 208 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:29,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:29,900 INFO L93 Difference]: Finished difference Result 130 states and 255 transitions. [2021-06-12 19:22:29,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:22:29,901 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 19:22:29,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:29,901 INFO L225 Difference]: With dead ends: 130 [2021-06-12 19:22:29,901 INFO L226 Difference]: Without dead ends: 123 [2021-06-12 19:22:29,901 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 245.4ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:22:29,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-06-12 19:22:29,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 106. [2021-06-12 19:22:29,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.057142857142857) internal successors, (216), 105 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 19:22:29,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 216 transitions. [2021-06-12 19:22:29,902 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 216 transitions. Word has length 19 [2021-06-12 19:22:29,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:29,902 INFO L482 AbstractCegarLoop]: Abstraction has 106 states and 216 transitions. [2021-06-12 19:22:29,902 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:29,903 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 216 transitions. [2021-06-12 19:22:29,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:22:29,903 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:29,903 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:30,103 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:30,110 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:30,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:30,110 INFO L82 PathProgramCache]: Analyzing trace with hash 2135600274, now seen corresponding path program 152 times [2021-06-12 19:22:30,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:30,111 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019501385] [2021-06-12 19:22:30,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:30,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:30,195 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:30,195 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:30,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019501385] [2021-06-12 19:22:30,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019501385] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:30,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337423035] [2021-06-12 19:22:30,195 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 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:30,215 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:22:30,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:22:30,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:22:30,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:30,406 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:30,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337423035] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:30,406 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:30,407 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 19:22:30,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961997231] [2021-06-12 19:22:30,407 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:22:30,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:30,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:22:30,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:22:30,407 INFO L87 Difference]: Start difference. First operand 106 states and 216 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:30,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:30,591 INFO L93 Difference]: Finished difference Result 153 states and 296 transitions. [2021-06-12 19:22:30,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:22:30,591 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 19:22:30,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:30,591 INFO L225 Difference]: With dead ends: 153 [2021-06-12 19:22:30,591 INFO L226 Difference]: Without dead ends: 146 [2021-06-12 19:22:30,591 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 276.9ms TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:22:30,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-06-12 19:22:30,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 107. [2021-06-12 19:22:30,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 2.0754716981132075) internal successors, (220), 106 states have internal predecessors, (220), 0 states have call successors, (0), 0 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 19:22:30,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 220 transitions. [2021-06-12 19:22:30,593 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 220 transitions. Word has length 19 [2021-06-12 19:22:30,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:30,593 INFO L482 AbstractCegarLoop]: Abstraction has 107 states and 220 transitions. [2021-06-12 19:22:30,593 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:30,593 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 220 transitions. [2021-06-12 19:22:30,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:22:30,593 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:30,593 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:30,793 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable160 [2021-06-12 19:22:30,794 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:30,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:30,794 INFO L82 PathProgramCache]: Analyzing trace with hash -2143906226, now seen corresponding path program 153 times [2021-06-12 19:22:30,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:30,794 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330238217] [2021-06-12 19:22:30,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:30,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:30,874 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:30,875 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:30,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330238217] [2021-06-12 19:22:30,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330238217] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:30,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478623663] [2021-06-12 19:22:30,875 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 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:30,895 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 19:22:30,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:22:30,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:22:30,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:31,111 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:31,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478623663] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:31,111 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:31,111 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 19:22:31,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320519886] [2021-06-12 19:22:31,111 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:22:31,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:31,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:22:31,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:22:31,111 INFO L87 Difference]: Start difference. First operand 107 states and 220 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:31,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:31,344 INFO L93 Difference]: Finished difference Result 140 states and 278 transitions. [2021-06-12 19:22:31,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:22:31,344 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 19:22:31,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:31,345 INFO L225 Difference]: With dead ends: 140 [2021-06-12 19:22:31,345 INFO L226 Difference]: Without dead ends: 133 [2021-06-12 19:22:31,345 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 290.3ms TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:22:31,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-06-12 19:22:31,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 105. [2021-06-12 19:22:31,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.048076923076923) internal successors, (213), 104 states have internal predecessors, (213), 0 states have call successors, (0), 0 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 19:22:31,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 213 transitions. [2021-06-12 19:22:31,346 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 213 transitions. Word has length 19 [2021-06-12 19:22:31,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:31,346 INFO L482 AbstractCegarLoop]: Abstraction has 105 states and 213 transitions. [2021-06-12 19:22:31,346 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:31,346 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 213 transitions. [2021-06-12 19:22:31,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:22:31,346 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:31,346 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:31,562 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:31,562 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:31,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:31,563 INFO L82 PathProgramCache]: Analyzing trace with hash -13196262, now seen corresponding path program 154 times [2021-06-12 19:22:31,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:31,563 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629842411] [2021-06-12 19:22:31,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:31,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:31,640 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:31,640 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:31,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629842411] [2021-06-12 19:22:31,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629842411] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:31,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870910599] [2021-06-12 19:22:31,640 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 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:31,660 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:22:31,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:22:31,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:22:31,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:31,857 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:31,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [870910599] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:31,857 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:31,857 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 19:22:31,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154464408] [2021-06-12 19:22:31,857 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:22:31,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:31,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:22:31,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:22:31,857 INFO L87 Difference]: Start difference. First operand 105 states and 213 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:32,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:32,070 INFO L93 Difference]: Finished difference Result 150 states and 292 transitions. [2021-06-12 19:22:32,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:22:32,070 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 19:22:32,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:32,071 INFO L225 Difference]: With dead ends: 150 [2021-06-12 19:22:32,071 INFO L226 Difference]: Without dead ends: 143 [2021-06-12 19:22:32,071 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 276.7ms TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:22:32,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-06-12 19:22:32,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 107. [2021-06-12 19:22:32,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 2.0754716981132075) internal successors, (220), 106 states have internal predecessors, (220), 0 states have call successors, (0), 0 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 19:22:32,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 220 transitions. [2021-06-12 19:22:32,072 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 220 transitions. Word has length 19 [2021-06-12 19:22:32,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:32,072 INFO L482 AbstractCegarLoop]: Abstraction has 107 states and 220 transitions. [2021-06-12 19:22:32,072 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:32,072 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 220 transitions. [2021-06-12 19:22:32,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:22:32,073 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:32,073 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:32,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:32,289 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:32,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:32,289 INFO L82 PathProgramCache]: Analyzing trace with hash 2264534, now seen corresponding path program 155 times [2021-06-12 19:22:32,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:32,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365844382] [2021-06-12 19:22:32,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:32,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:32,366 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:32,366 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:32,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365844382] [2021-06-12 19:22:32,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365844382] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:32,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793721933] [2021-06-12 19:22:32,366 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 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:32,386 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:22:32,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:22:32,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:22:32,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:32,572 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:32,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793721933] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:32,572 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:32,572 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 19:22:32,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225388132] [2021-06-12 19:22:32,572 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:22:32,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:32,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:22:32,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:22:32,572 INFO L87 Difference]: Start difference. First operand 107 states and 220 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:32,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:32,769 INFO L93 Difference]: Finished difference Result 156 states and 303 transitions. [2021-06-12 19:22:32,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:22:32,769 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 19:22:32,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:32,770 INFO L225 Difference]: With dead ends: 156 [2021-06-12 19:22:32,770 INFO L226 Difference]: Without dead ends: 149 [2021-06-12 19:22:32,770 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 277.9ms TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:22:32,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-06-12 19:22:32,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 106. [2021-06-12 19:22:32,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.057142857142857) internal successors, (216), 105 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 19:22:32,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 216 transitions. [2021-06-12 19:22:32,771 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 216 transitions. Word has length 19 [2021-06-12 19:22:32,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:32,771 INFO L482 AbstractCegarLoop]: Abstraction has 106 states and 216 transitions. [2021-06-12 19:22:32,771 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:32,771 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 216 transitions. [2021-06-12 19:22:32,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:22:32,771 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:32,771 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:32,972 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable163 [2021-06-12 19:22:32,972 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:32,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:32,972 INFO L82 PathProgramCache]: Analyzing trace with hash 573719340, now seen corresponding path program 156 times [2021-06-12 19:22:32,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:32,972 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676492510] [2021-06-12 19:22:32,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:32,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:33,045 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:33,045 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:33,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676492510] [2021-06-12 19:22:33,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676492510] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:33,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914814095] [2021-06-12 19:22:33,046 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 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:33,066 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:22:33,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:22:33,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:22:33,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:33,255 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:33,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914814095] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:33,255 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:33,255 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 19:22:33,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619563548] [2021-06-12 19:22:33,255 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:22:33,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:33,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:22:33,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:22:33,256 INFO L87 Difference]: Start difference. First operand 106 states and 216 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:33,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:33,434 INFO L93 Difference]: Finished difference Result 133 states and 262 transitions. [2021-06-12 19:22:33,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:22:33,434 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 19:22:33,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:33,434 INFO L225 Difference]: With dead ends: 133 [2021-06-12 19:22:33,434 INFO L226 Difference]: Without dead ends: 126 [2021-06-12 19:22:33,434 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 249.4ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:22:33,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-06-12 19:22:33,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 104. [2021-06-12 19:22:33,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.0485436893203883) internal successors, (211), 103 states have internal predecessors, (211), 0 states have call successors, (0), 0 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 19:22:33,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 211 transitions. [2021-06-12 19:22:33,436 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 211 transitions. Word has length 19 [2021-06-12 19:22:33,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:33,436 INFO L482 AbstractCegarLoop]: Abstraction has 104 states and 211 transitions. [2021-06-12 19:22:33,436 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:33,436 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 211 transitions. [2021-06-12 19:22:33,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:22:33,436 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:33,436 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:33,652 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:33,652 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:33,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:33,652 INFO L82 PathProgramCache]: Analyzing trace with hash -1107287850, now seen corresponding path program 157 times [2021-06-12 19:22:33,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:33,652 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339017113] [2021-06-12 19:22:33,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:33,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:33,731 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:33,732 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:33,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339017113] [2021-06-12 19:22:33,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339017113] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:33,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853099381] [2021-06-12 19:22:33,732 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 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:33,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:33,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:22:33,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:33,941 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:33,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853099381] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:33,942 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:33,942 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 19:22:33,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474354253] [2021-06-12 19:22:33,942 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:22:33,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:33,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:22:33,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:22:33,942 INFO L87 Difference]: Start difference. First operand 104 states and 211 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:34,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:34,182 INFO L93 Difference]: Finished difference Result 168 states and 326 transitions. [2021-06-12 19:22:34,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:22:34,182 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 19:22:34,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:34,182 INFO L225 Difference]: With dead ends: 168 [2021-06-12 19:22:34,183 INFO L226 Difference]: Without dead ends: 161 [2021-06-12 19:22:34,183 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 296.9ms TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:22:34,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-06-12 19:22:34,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 107. [2021-06-12 19:22:34,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 2.0943396226415096) internal successors, (222), 106 states have internal predecessors, (222), 0 states have call successors, (0), 0 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 19:22:34,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 222 transitions. [2021-06-12 19:22:34,184 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 222 transitions. Word has length 19 [2021-06-12 19:22:34,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:34,184 INFO L482 AbstractCegarLoop]: Abstraction has 107 states and 222 transitions. [2021-06-12 19:22:34,184 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:34,184 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 222 transitions. [2021-06-12 19:22:34,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:22:34,184 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:34,184 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:34,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:34,400 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:34,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:34,401 INFO L82 PathProgramCache]: Analyzing trace with hash -1091827054, now seen corresponding path program 158 times [2021-06-12 19:22:34,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:34,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695164081] [2021-06-12 19:22:34,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:34,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:34,481 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:34,481 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:34,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695164081] [2021-06-12 19:22:34,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695164081] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:34,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168159689] [2021-06-12 19:22:34,481 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 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:34,501 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:22:34,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:22:34,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:22:34,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:34,706 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:34,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1168159689] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:34,706 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:34,706 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 19:22:34,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334580563] [2021-06-12 19:22:34,706 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:22:34,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:34,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:22:34,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:22:34,707 INFO L87 Difference]: Start difference. First operand 107 states and 222 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:34,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:34,987 INFO L93 Difference]: Finished difference Result 174 states and 337 transitions. [2021-06-12 19:22:34,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:22:34,988 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 19:22:34,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:34,988 INFO L225 Difference]: With dead ends: 174 [2021-06-12 19:22:34,988 INFO L226 Difference]: Without dead ends: 167 [2021-06-12 19:22:34,988 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 297.5ms TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:22:34,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-06-12 19:22:34,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 106. [2021-06-12 19:22:34,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.0761904761904764) internal successors, (218), 105 states have internal predecessors, (218), 0 states have call successors, (0), 0 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 19:22:34,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 218 transitions. [2021-06-12 19:22:34,989 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 218 transitions. Word has length 19 [2021-06-12 19:22:34,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:34,989 INFO L482 AbstractCegarLoop]: Abstraction has 106 states and 218 transitions. [2021-06-12 19:22:34,989 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:34,989 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 218 transitions. [2021-06-12 19:22:34,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:22:34,990 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:34,990 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:35,190 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2021-06-12 19:22:35,191 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:35,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:35,191 INFO L82 PathProgramCache]: Analyzing trace with hash -520372248, now seen corresponding path program 159 times [2021-06-12 19:22:35,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:35,191 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507687469] [2021-06-12 19:22:35,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:35,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:35,267 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:35,267 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:35,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507687469] [2021-06-12 19:22:35,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507687469] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:35,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480267643] [2021-06-12 19:22:35,268 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 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:35,288 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 19:22:35,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:22:35,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:22:35,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:35,477 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:35,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480267643] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:35,478 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:35,478 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 19:22:35,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575026123] [2021-06-12 19:22:35,478 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:22:35,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:35,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:22:35,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:22:35,478 INFO L87 Difference]: Start difference. First operand 106 states and 218 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:35,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:35,672 INFO L93 Difference]: Finished difference Result 153 states and 299 transitions. [2021-06-12 19:22:35,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:22:35,672 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 19:22:35,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:35,673 INFO L225 Difference]: With dead ends: 153 [2021-06-12 19:22:35,673 INFO L226 Difference]: Without dead ends: 146 [2021-06-12 19:22:35,673 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 249.6ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:22:35,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-06-12 19:22:35,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 105. [2021-06-12 19:22:35,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.0673076923076925) internal successors, (215), 104 states have internal predecessors, (215), 0 states have call successors, (0), 0 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 19:22:35,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 215 transitions. [2021-06-12 19:22:35,674 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 215 transitions. Word has length 19 [2021-06-12 19:22:35,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:35,674 INFO L482 AbstractCegarLoop]: Abstraction has 105 states and 215 transitions. [2021-06-12 19:22:35,674 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:35,674 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 215 transitions. [2021-06-12 19:22:35,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:22:35,674 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:35,674 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:35,874 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2021-06-12 19:22:35,875 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:35,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:35,875 INFO L82 PathProgramCache]: Analyzing trace with hash 917043286, now seen corresponding path program 160 times [2021-06-12 19:22:35,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:35,875 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123022835] [2021-06-12 19:22:35,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:35,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:35,951 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:35,951 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:35,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123022835] [2021-06-12 19:22:35,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123022835] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:35,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122498145] [2021-06-12 19:22:35,952 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 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:35,972 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:22:35,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:22:35,973 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 19:22:35,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:36,120 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:36,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122498145] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:36,120 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:36,120 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 19:22:36,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321697780] [2021-06-12 19:22:36,125 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:22:36,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:36,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:22:36,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:22:36,125 INFO L87 Difference]: Start difference. First operand 105 states and 215 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:36,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:36,712 INFO L93 Difference]: Finished difference Result 196 states and 368 transitions. [2021-06-12 19:22:36,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 19:22:36,713 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 19:22:36,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:36,713 INFO L225 Difference]: With dead ends: 196 [2021-06-12 19:22:36,713 INFO L226 Difference]: Without dead ends: 149 [2021-06-12 19:22:36,713 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 561.5ms TimeCoverageRelationStatistics Valid=219, Invalid=903, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 19:22:36,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-06-12 19:22:36,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 117. [2021-06-12 19:22:36,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 2.086206896551724) internal successors, (242), 116 states have internal predecessors, (242), 0 states have call successors, (0), 0 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 19:22:36,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 242 transitions. [2021-06-12 19:22:36,714 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 242 transitions. Word has length 19 [2021-06-12 19:22:36,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:36,714 INFO L482 AbstractCegarLoop]: Abstraction has 117 states and 242 transitions. [2021-06-12 19:22:36,714 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:36,714 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 242 transitions. [2021-06-12 19:22:36,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:22:36,715 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:36,715 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:36,915 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2021-06-12 19:22:36,915 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:36,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:36,915 INFO L82 PathProgramCache]: Analyzing trace with hash 534322898, now seen corresponding path program 161 times [2021-06-12 19:22:36,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:36,916 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816265883] [2021-06-12 19:22:36,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:36,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:36,993 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:36,993 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:36,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816265883] [2021-06-12 19:22:36,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816265883] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:36,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767459781] [2021-06-12 19:22:36,993 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 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:37,014 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:22:37,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:22:37,015 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 19:22:37,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:37,312 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:37,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767459781] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:37,313 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:37,313 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 19:22:37,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95913596] [2021-06-12 19:22:37,313 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:22:37,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:37,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:22:37,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:22:37,313 INFO L87 Difference]: Start difference. First operand 117 states and 242 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:37,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:37,747 INFO L93 Difference]: Finished difference Result 156 states and 310 transitions. [2021-06-12 19:22:37,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 19:22:37,747 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 19:22:37,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:37,747 INFO L225 Difference]: With dead ends: 156 [2021-06-12 19:22:37,747 INFO L226 Difference]: Without dead ends: 149 [2021-06-12 19:22:37,747 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 420.8ms TimeCoverageRelationStatistics Valid=132, Invalid=624, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:22:37,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-06-12 19:22:37,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 113. [2021-06-12 19:22:37,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.0892857142857144) internal successors, (234), 112 states have internal predecessors, (234), 0 states have call successors, (0), 0 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 19:22:37,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 234 transitions. [2021-06-12 19:22:37,749 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 234 transitions. Word has length 19 [2021-06-12 19:22:37,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:37,749 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 234 transitions. [2021-06-12 19:22:37,749 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:37,749 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 234 transitions. [2021-06-12 19:22:37,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:22:37,749 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:37,749 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:37,950 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 170 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2021-06-12 19:22:37,950 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:37,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:37,950 INFO L82 PathProgramCache]: Analyzing trace with hash -1681350570, now seen corresponding path program 162 times [2021-06-12 19:22:37,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:37,950 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014028967] [2021-06-12 19:22:37,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:37,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:38,043 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:38,043 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:38,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014028967] [2021-06-12 19:22:38,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014028967] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:38,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324094225] [2021-06-12 19:22:38,043 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 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:38,066 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:22:38,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:22:38,066 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 19:22:38,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:38,316 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:38,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324094225] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:38,316 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:38,316 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 19:22:38,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414948344] [2021-06-12 19:22:38,317 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:22:38,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:38,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:22:38,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:22:38,317 INFO L87 Difference]: Start difference. First operand 113 states and 234 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:38,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:38,915 INFO L93 Difference]: Finished difference Result 206 states and 402 transitions. [2021-06-12 19:22:38,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 19:22:38,915 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 19:22:38,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:38,916 INFO L225 Difference]: With dead ends: 206 [2021-06-12 19:22:38,916 INFO L226 Difference]: Without dead ends: 199 [2021-06-12 19:22:38,916 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 630.4ms TimeCoverageRelationStatistics Valid=204, Invalid=986, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 19:22:38,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-06-12 19:22:38,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 114. [2021-06-12 19:22:38,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.106194690265487) internal successors, (238), 113 states have internal predecessors, (238), 0 states have call successors, (0), 0 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 19:22:38,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 238 transitions. [2021-06-12 19:22:38,917 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 238 transitions. Word has length 19 [2021-06-12 19:22:38,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:38,917 INFO L482 AbstractCegarLoop]: Abstraction has 114 states and 238 transitions. [2021-06-12 19:22:38,917 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:38,917 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 238 transitions. [2021-06-12 19:22:38,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:22:38,917 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:38,918 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:39,133 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable170 [2021-06-12 19:22:39,133 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:39,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:39,134 INFO L82 PathProgramCache]: Analyzing trace with hash -1665889774, now seen corresponding path program 163 times [2021-06-12 19:22:39,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:39,134 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466618338] [2021-06-12 19:22:39,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:39,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:39,217 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:39,217 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:39,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466618338] [2021-06-12 19:22:39,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466618338] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:39,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339342214] [2021-06-12 19:22:39,218 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 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:39,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:39,239 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 19:22:39,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:39,726 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:39,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1339342214] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:39,726 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:39,726 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 19:22:39,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352181581] [2021-06-12 19:22:39,726 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:22:39,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:39,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:22:39,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:22:39,727 INFO L87 Difference]: Start difference. First operand 114 states and 238 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:40,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:40,313 INFO L93 Difference]: Finished difference Result 197 states and 390 transitions. [2021-06-12 19:22:40,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 19:22:40,313 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 19:22:40,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:40,313 INFO L225 Difference]: With dead ends: 197 [2021-06-12 19:22:40,313 INFO L226 Difference]: Without dead ends: 190 [2021-06-12 19:22:40,314 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 592.7ms TimeCoverageRelationStatistics Valid=204, Invalid=1056, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 19:22:40,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-06-12 19:22:40,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 112. [2021-06-12 19:22:40,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.081081081081081) internal successors, (231), 111 states have internal predecessors, (231), 0 states have call successors, (0), 0 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 19:22:40,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 231 transitions. [2021-06-12 19:22:40,315 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 231 transitions. Word has length 19 [2021-06-12 19:22:40,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:40,315 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 231 transitions. [2021-06-12 19:22:40,315 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:40,315 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 231 transitions. [2021-06-12 19:22:40,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:22:40,315 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:40,315 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:40,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:40,516 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:40,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:40,516 INFO L82 PathProgramCache]: Analyzing trace with hash -1058227826, now seen corresponding path program 164 times [2021-06-12 19:22:40,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:40,516 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786755404] [2021-06-12 19:22:40,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:40,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:40,590 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:40,591 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:40,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786755404] [2021-06-12 19:22:40,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786755404] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:40,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601772306] [2021-06-12 19:22:40,591 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 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:40,611 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:22:40,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:22:40,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:22:40,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:40,794 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:40,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601772306] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:40,794 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:40,794 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 19:22:40,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65400275] [2021-06-12 19:22:40,794 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:22:40,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:40,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:22:40,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:22:40,795 INFO L87 Difference]: Start difference. First operand 112 states and 231 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:41,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:41,003 INFO L93 Difference]: Finished difference Result 158 states and 311 transitions. [2021-06-12 19:22:41,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:22:41,003 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 19:22:41,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:41,003 INFO L225 Difference]: With dead ends: 158 [2021-06-12 19:22:41,003 INFO L226 Difference]: Without dead ends: 151 [2021-06-12 19:22:41,004 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 253.4ms TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:22:41,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-06-12 19:22:41,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 109. [2021-06-12 19:22:41,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.074074074074074) internal successors, (224), 108 states have internal predecessors, (224), 0 states have call successors, (0), 0 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 19:22:41,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 224 transitions. [2021-06-12 19:22:41,005 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 224 transitions. Word has length 19 [2021-06-12 19:22:41,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:41,005 INFO L482 AbstractCegarLoop]: Abstraction has 109 states and 224 transitions. [2021-06-12 19:22:41,005 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:41,005 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 224 transitions. [2021-06-12 19:22:41,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:22:41,005 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:41,005 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:41,205 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:41,206 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:41,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:41,206 INFO L82 PathProgramCache]: Analyzing trace with hash -1703746494, now seen corresponding path program 165 times [2021-06-12 19:22:41,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:41,206 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618178003] [2021-06-12 19:22:41,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:41,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:41,287 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:41,288 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:41,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618178003] [2021-06-12 19:22:41,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618178003] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:41,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646495454] [2021-06-12 19:22:41,288 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 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:41,308 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:22:41,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:22:41,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:22:41,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:41,504 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:41,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [646495454] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:41,504 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:41,504 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 19:22:41,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467222782] [2021-06-12 19:22:41,504 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:22:41,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:41,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:22:41,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:22:41,505 INFO L87 Difference]: Start difference. First operand 109 states and 224 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:41,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:41,698 INFO L93 Difference]: Finished difference Result 128 states and 256 transitions. [2021-06-12 19:22:41,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:22:41,698 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 19:22:41,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:41,699 INFO L225 Difference]: With dead ends: 128 [2021-06-12 19:22:41,699 INFO L226 Difference]: Without dead ends: 121 [2021-06-12 19:22:41,699 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 259.8ms TimeCoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:22:41,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-06-12 19:22:41,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 112. [2021-06-12 19:22:41,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.09009009009009) internal successors, (232), 111 states have internal predecessors, (232), 0 states have call successors, (0), 0 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 19:22:41,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 232 transitions. [2021-06-12 19:22:41,700 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 232 transitions. Word has length 19 [2021-06-12 19:22:41,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:41,700 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 232 transitions. [2021-06-12 19:22:41,700 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:41,700 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 232 transitions. [2021-06-12 19:22:41,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:22:41,700 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:41,700 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:41,914 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:41,914 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:41,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:41,915 INFO L82 PathProgramCache]: Analyzing trace with hash 375547334, now seen corresponding path program 166 times [2021-06-12 19:22:41,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:41,915 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863211307] [2021-06-12 19:22:41,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:41,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:41,999 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:41,999 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:41,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863211307] [2021-06-12 19:22:41,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863211307] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:41,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598304322] [2021-06-12 19:22:41,999 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 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:42,019 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:22:42,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:22:42,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:22:42,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:42,218 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:42,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598304322] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:42,218 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:42,218 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 19:22:42,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478164940] [2021-06-12 19:22:42,218 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:22:42,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:42,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:22:42,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:22:42,219 INFO L87 Difference]: Start difference. First operand 112 states and 232 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:42,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:42,412 INFO L93 Difference]: Finished difference Result 151 states and 297 transitions. [2021-06-12 19:22:42,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:22:42,412 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 19:22:42,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:42,412 INFO L225 Difference]: With dead ends: 151 [2021-06-12 19:22:42,412 INFO L226 Difference]: Without dead ends: 144 [2021-06-12 19:22:42,413 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 283.6ms TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:22:42,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-06-12 19:22:42,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 113. [2021-06-12 19:22:42,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.107142857142857) internal successors, (236), 112 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 19:22:42,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 236 transitions. [2021-06-12 19:22:42,414 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 236 transitions. Word has length 19 [2021-06-12 19:22:42,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:42,414 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 236 transitions. [2021-06-12 19:22:42,414 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:42,414 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 236 transitions. [2021-06-12 19:22:42,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:22:42,414 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:42,414 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:42,614 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,175 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:42,615 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:42,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:42,615 INFO L82 PathProgramCache]: Analyzing trace with hash 391008130, now seen corresponding path program 167 times [2021-06-12 19:22:42,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:42,615 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16422059] [2021-06-12 19:22:42,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:42,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:42,695 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:42,696 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:42,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16422059] [2021-06-12 19:22:42,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16422059] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:42,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720719283] [2021-06-12 19:22:42,696 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 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:42,716 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 19:22:42,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:22:42,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:22:42,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:42,906 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:42,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720719283] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:42,906 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:42,906 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 19:22:42,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816711982] [2021-06-12 19:22:42,906 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:22:42,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:42,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:22:42,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:22:42,907 INFO L87 Difference]: Start difference. First operand 113 states and 236 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:43,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:43,121 INFO L93 Difference]: Finished difference Result 138 states and 279 transitions. [2021-06-12 19:22:43,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:22:43,121 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 19:22:43,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:43,121 INFO L225 Difference]: With dead ends: 138 [2021-06-12 19:22:43,121 INFO L226 Difference]: Without dead ends: 131 [2021-06-12 19:22:43,121 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 281.4ms TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:22:43,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-06-12 19:22:43,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 111. [2021-06-12 19:22:43,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.081818181818182) internal successors, (229), 110 states have internal predecessors, (229), 0 states have call successors, (0), 0 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 19:22:43,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 229 transitions. [2021-06-12 19:22:43,123 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 229 transitions. Word has length 19 [2021-06-12 19:22:43,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:43,123 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 229 transitions. [2021-06-12 19:22:43,123 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:43,123 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 229 transitions. [2021-06-12 19:22:43,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:22:43,123 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:43,123 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:43,323 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,176 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:43,324 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:43,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:43,324 INFO L82 PathProgramCache]: Analyzing trace with hash -1773249202, now seen corresponding path program 168 times [2021-06-12 19:22:43,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:43,324 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516161706] [2021-06-12 19:22:43,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:43,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:43,405 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:43,405 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:43,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516161706] [2021-06-12 19:22:43,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516161706] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:43,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736147126] [2021-06-12 19:22:43,405 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 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:43,426 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 19:22:43,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:22:43,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:22:43,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:43,617 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:43,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1736147126] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:43,617 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:43,617 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 19:22:43,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615655310] [2021-06-12 19:22:43,617 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:22:43,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:43,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:22:43,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:22:43,617 INFO L87 Difference]: Start difference. First operand 111 states and 229 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:43,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:43,857 INFO L93 Difference]: Finished difference Result 152 states and 301 transitions. [2021-06-12 19:22:43,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:22:43,857 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 19:22:43,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:43,857 INFO L225 Difference]: With dead ends: 152 [2021-06-12 19:22:43,857 INFO L226 Difference]: Without dead ends: 145 [2021-06-12 19:22:43,858 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 333.9ms TimeCoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:22:43,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-06-12 19:22:43,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 113. [2021-06-12 19:22:43,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.107142857142857) internal successors, (236), 112 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 19:22:43,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 236 transitions. [2021-06-12 19:22:43,859 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 236 transitions. Word has length 19 [2021-06-12 19:22:43,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:43,859 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 236 transitions. [2021-06-12 19:22:43,859 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:43,859 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 236 transitions. [2021-06-12 19:22:43,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:22:43,859 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:43,859 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:44,059 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:44,060 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:44,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:44,060 INFO L82 PathProgramCache]: Analyzing trace with hash -1757788406, now seen corresponding path program 169 times [2021-06-12 19:22:44,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:44,060 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798638949] [2021-06-12 19:22:44,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:44,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:44,146 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:44,146 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:44,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798638949] [2021-06-12 19:22:44,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798638949] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:44,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448401683] [2021-06-12 19:22:44,146 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 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:44,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:44,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:22:44,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:44,354 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:44,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448401683] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:44,354 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:44,354 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 19:22:44,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140500550] [2021-06-12 19:22:44,354 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:22:44,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:44,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:22:44,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:22:44,355 INFO L87 Difference]: Start difference. First operand 113 states and 236 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:44,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:44,620 INFO L93 Difference]: Finished difference Result 158 states and 312 transitions. [2021-06-12 19:22:44,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:22:44,620 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 19:22:44,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:44,620 INFO L225 Difference]: With dead ends: 158 [2021-06-12 19:22:44,621 INFO L226 Difference]: Without dead ends: 151 [2021-06-12 19:22:44,621 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 307.4ms TimeCoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:22:44,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-06-12 19:22:44,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 112. [2021-06-12 19:22:44,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.09009009009009) internal successors, (232), 111 states have internal predecessors, (232), 0 states have call successors, (0), 0 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 19:22:44,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 232 transitions. [2021-06-12 19:22:44,622 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 232 transitions. Word has length 19 [2021-06-12 19:22:44,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:44,622 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 232 transitions. [2021-06-12 19:22:44,622 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:44,622 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 232 transitions. [2021-06-12 19:22:44,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:22:44,622 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:44,622 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:44,822 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2021-06-12 19:22:44,823 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:44,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:44,823 INFO L82 PathProgramCache]: Analyzing trace with hash -1186333600, now seen corresponding path program 170 times [2021-06-12 19:22:44,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:44,823 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431393279] [2021-06-12 19:22:44,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:44,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:44,898 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:44,898 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:44,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431393279] [2021-06-12 19:22:44,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431393279] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:44,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787857792] [2021-06-12 19:22:44,898 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 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:44,918 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:22:44,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:22:44,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:22:44,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:45,112 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:45,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787857792] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:45,112 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:45,112 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 19:22:45,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88943928] [2021-06-12 19:22:45,113 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:22:45,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:45,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:22:45,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:22:45,113 INFO L87 Difference]: Start difference. First operand 112 states and 232 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:45,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:45,291 INFO L93 Difference]: Finished difference Result 132 states and 265 transitions. [2021-06-12 19:22:45,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:22:45,291 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 19:22:45,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:45,292 INFO L225 Difference]: With dead ends: 132 [2021-06-12 19:22:45,292 INFO L226 Difference]: Without dead ends: 125 [2021-06-12 19:22:45,292 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 271.0ms TimeCoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:22:45,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-06-12 19:22:45,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 110. [2021-06-12 19:22:45,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.0825688073394497) internal successors, (227), 109 states have internal predecessors, (227), 0 states have call successors, (0), 0 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 19:22:45,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 227 transitions. [2021-06-12 19:22:45,293 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 227 transitions. Word has length 19 [2021-06-12 19:22:45,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:45,293 INFO L482 AbstractCegarLoop]: Abstraction has 110 states and 227 transitions. [2021-06-12 19:22:45,293 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:45,293 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 227 transitions. [2021-06-12 19:22:45,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:22:45,293 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:45,293 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:45,494 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 179 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2021-06-12 19:22:45,494 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:45,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:45,494 INFO L82 PathProgramCache]: Analyzing trace with hash 1427626506, now seen corresponding path program 171 times [2021-06-12 19:22:45,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:45,494 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358745373] [2021-06-12 19:22:45,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:45,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:45,577 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:45,577 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:45,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358745373] [2021-06-12 19:22:45,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358745373] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:45,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185593909] [2021-06-12 19:22:45,577 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 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:45,597 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:22:45,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:22:45,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:22:45,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:45,787 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:45,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185593909] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:45,787 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:45,787 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 19:22:45,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142137706] [2021-06-12 19:22:45,787 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:22:45,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:45,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:22:45,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:22:45,788 INFO L87 Difference]: Start difference. First operand 110 states and 227 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:46,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:46,103 INFO L93 Difference]: Finished difference Result 173 states and 341 transitions. [2021-06-12 19:22:46,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:22:46,103 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 19:22:46,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:46,103 INFO L225 Difference]: With dead ends: 173 [2021-06-12 19:22:46,103 INFO L226 Difference]: Without dead ends: 166 [2021-06-12 19:22:46,104 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 329.2ms TimeCoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:22:46,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-06-12 19:22:46,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 113. [2021-06-12 19:22:46,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.125) internal successors, (238), 112 states have internal predecessors, (238), 0 states have call successors, (0), 0 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 19:22:46,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 238 transitions. [2021-06-12 19:22:46,105 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 238 transitions. Word has length 19 [2021-06-12 19:22:46,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:46,105 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 238 transitions. [2021-06-12 19:22:46,105 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:46,105 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 238 transitions. [2021-06-12 19:22:46,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:22:46,105 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:46,105 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:46,305 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 180 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2021-06-12 19:22:46,306 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:46,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:46,306 INFO L82 PathProgramCache]: Analyzing trace with hash 1443087302, now seen corresponding path program 172 times [2021-06-12 19:22:46,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:46,306 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150344466] [2021-06-12 19:22:46,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:46,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:46,384 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:46,385 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:46,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150344466] [2021-06-12 19:22:46,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150344466] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:46,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900064162] [2021-06-12 19:22:46,385 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 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:46,405 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:22:46,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:22:46,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:22:46,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:46,592 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:46,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900064162] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:46,592 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:46,592 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 19:22:46,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349024405] [2021-06-12 19:22:46,592 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:22:46,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:46,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:22:46,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:22:46,592 INFO L87 Difference]: Start difference. First operand 113 states and 238 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:46,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:46,876 INFO L93 Difference]: Finished difference Result 179 states and 352 transitions. [2021-06-12 19:22:46,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:22:46,876 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 19:22:46,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:46,876 INFO L225 Difference]: With dead ends: 179 [2021-06-12 19:22:46,876 INFO L226 Difference]: Without dead ends: 172 [2021-06-12 19:22:46,877 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 302.3ms TimeCoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:22:46,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-06-12 19:22:46,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 112. [2021-06-12 19:22:46,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.108108108108108) internal successors, (234), 111 states have internal predecessors, (234), 0 states have call successors, (0), 0 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 19:22:46,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 234 transitions. [2021-06-12 19:22:46,878 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 234 transitions. Word has length 19 [2021-06-12 19:22:46,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:46,878 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 234 transitions. [2021-06-12 19:22:46,878 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:46,878 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 234 transitions. [2021-06-12 19:22:46,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:22:46,878 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:46,878 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:47,078 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:47,079 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:47,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:47,079 INFO L82 PathProgramCache]: Analyzing trace with hash 2014542108, now seen corresponding path program 173 times [2021-06-12 19:22:47,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:47,079 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144435458] [2021-06-12 19:22:47,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:47,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:47,154 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:47,155 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:47,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144435458] [2021-06-12 19:22:47,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144435458] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:47,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129280662] [2021-06-12 19:22:47,155 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 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:47,176 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:22:47,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:22:47,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:22:47,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:47,378 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:47,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1129280662] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:47,378 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:47,378 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 19:22:47,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380513222] [2021-06-12 19:22:47,378 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:22:47,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:47,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:22:47,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:22:47,378 INFO L87 Difference]: Start difference. First operand 112 states and 234 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:47,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:47,597 INFO L93 Difference]: Finished difference Result 156 states and 310 transitions. [2021-06-12 19:22:47,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:22:47,597 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 19:22:47,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:47,597 INFO L225 Difference]: With dead ends: 156 [2021-06-12 19:22:47,597 INFO L226 Difference]: Without dead ends: 149 [2021-06-12 19:22:47,597 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 270.0ms TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:22:47,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-06-12 19:22:47,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 111. [2021-06-12 19:22:47,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.1) internal successors, (231), 110 states have internal predecessors, (231), 0 states have call successors, (0), 0 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 19:22:47,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 231 transitions. [2021-06-12 19:22:47,599 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 231 transitions. Word has length 19 [2021-06-12 19:22:47,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:47,599 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 231 transitions. [2021-06-12 19:22:47,599 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:47,599 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 231 transitions. [2021-06-12 19:22:47,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:22:47,599 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:47,599 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:47,799 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:47,799 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:47,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:47,800 INFO L82 PathProgramCache]: Analyzing trace with hash 1476686530, now seen corresponding path program 174 times [2021-06-12 19:22:47,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:47,800 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72105845] [2021-06-12 19:22:47,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:47,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:47,887 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:47,887 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:47,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72105845] [2021-06-12 19:22:47,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72105845] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:47,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81059986] [2021-06-12 19:22:47,887 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 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:47,907 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:22:47,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:22:47,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:22:47,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:48,102 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:48,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [81059986] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:48,102 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:48,102 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 19:22:48,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925760684] [2021-06-12 19:22:48,103 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:22:48,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:48,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:22:48,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:22:48,103 INFO L87 Difference]: Start difference. First operand 111 states and 231 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:48,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:48,288 INFO L93 Difference]: Finished difference Result 150 states and 298 transitions. [2021-06-12 19:22:48,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:22:48,288 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 19:22:48,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:48,289 INFO L225 Difference]: With dead ends: 150 [2021-06-12 19:22:48,289 INFO L226 Difference]: Without dead ends: 143 [2021-06-12 19:22:48,289 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 271.9ms TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:22:48,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-06-12 19:22:48,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 107. [2021-06-12 19:22:48,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 2.0660377358490565) internal successors, (219), 106 states have internal predecessors, (219), 0 states have call successors, (0), 0 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 19:22:48,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 219 transitions. [2021-06-12 19:22:48,290 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 219 transitions. Word has length 19 [2021-06-12 19:22:48,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:48,290 INFO L482 AbstractCegarLoop]: Abstraction has 107 states and 219 transitions. [2021-06-12 19:22:48,290 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:48,290 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 219 transitions. [2021-06-12 19:22:48,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:22:48,290 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:48,290 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:48,491 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable182 [2021-06-12 19:22:48,491 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:48,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:48,491 INFO L82 PathProgramCache]: Analyzing trace with hash -1981542510, now seen corresponding path program 175 times [2021-06-12 19:22:48,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:48,491 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179364403] [2021-06-12 19:22:48,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:48,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:48,587 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:48,587 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:48,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179364403] [2021-06-12 19:22:48,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179364403] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:48,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846497860] [2021-06-12 19:22:48,587 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 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:48,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:48,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:22:48,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:48,795 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:48,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846497860] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:48,796 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:48,796 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 19:22:48,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541992876] [2021-06-12 19:22:48,796 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:22:48,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:48,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:22:48,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:22:48,796 INFO L87 Difference]: Start difference. First operand 107 states and 219 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:49,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:49,112 INFO L93 Difference]: Finished difference Result 173 states and 338 transitions. [2021-06-12 19:22:49,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:22:49,113 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 19:22:49,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:49,113 INFO L225 Difference]: With dead ends: 173 [2021-06-12 19:22:49,113 INFO L226 Difference]: Without dead ends: 166 [2021-06-12 19:22:49,113 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 292.4ms TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:22:49,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-06-12 19:22:49,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 111. [2021-06-12 19:22:49,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.118181818181818) internal successors, (233), 110 states have internal predecessors, (233), 0 states have call successors, (0), 0 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 19:22:49,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 233 transitions. [2021-06-12 19:22:49,115 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 233 transitions. Word has length 19 [2021-06-12 19:22:49,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:49,115 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 233 transitions. [2021-06-12 19:22:49,115 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:49,115 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 233 transitions. [2021-06-12 19:22:49,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:22:49,115 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:49,115 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:49,315 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:49,315 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:49,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:49,316 INFO L82 PathProgramCache]: Analyzing trace with hash -1966081714, now seen corresponding path program 176 times [2021-06-12 19:22:49,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:49,316 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60437345] [2021-06-12 19:22:49,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:49,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:49,396 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:49,397 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:49,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60437345] [2021-06-12 19:22:49,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60437345] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:49,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783447675] [2021-06-12 19:22:49,397 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 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:49,417 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:22:49,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:22:49,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:22:49,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:49,604 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:49,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783447675] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:49,604 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:49,604 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 19:22:49,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427279571] [2021-06-12 19:22:49,604 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:22:49,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:49,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:22:49,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:22:49,604 INFO L87 Difference]: Start difference. First operand 111 states and 233 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:49,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:49,876 INFO L93 Difference]: Finished difference Result 179 states and 349 transitions. [2021-06-12 19:22:49,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:22:49,876 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 19:22:49,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:49,876 INFO L225 Difference]: With dead ends: 179 [2021-06-12 19:22:49,876 INFO L226 Difference]: Without dead ends: 172 [2021-06-12 19:22:49,876 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 286.4ms TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:22:49,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-06-12 19:22:49,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 110. [2021-06-12 19:22:49,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.1009174311926606) internal successors, (229), 109 states have internal predecessors, (229), 0 states have call successors, (0), 0 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 19:22:49,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 229 transitions. [2021-06-12 19:22:49,878 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 229 transitions. Word has length 19 [2021-06-12 19:22:49,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:49,878 INFO L482 AbstractCegarLoop]: Abstraction has 110 states and 229 transitions. [2021-06-12 19:22:49,878 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:49,878 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 229 transitions. [2021-06-12 19:22:49,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:22:49,878 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:49,878 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:50,078 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,185 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:50,079 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:50,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:50,079 INFO L82 PathProgramCache]: Analyzing trace with hash -1394626908, now seen corresponding path program 177 times [2021-06-12 19:22:50,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:50,079 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568331788] [2021-06-12 19:22:50,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:50,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:50,161 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:50,161 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:50,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568331788] [2021-06-12 19:22:50,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568331788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:50,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927832784] [2021-06-12 19:22:50,162 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 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:50,183 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 19:22:50,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:22:50,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:22:50,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:50,384 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:50,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927832784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:50,384 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:50,384 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 19:22:50,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464673031] [2021-06-12 19:22:50,384 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:22:50,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:50,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:22:50,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:22:50,385 INFO L87 Difference]: Start difference. First operand 110 states and 229 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:50,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:50,588 INFO L93 Difference]: Finished difference Result 152 states and 300 transitions. [2021-06-12 19:22:50,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:22:50,589 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 19:22:50,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:50,589 INFO L225 Difference]: With dead ends: 152 [2021-06-12 19:22:50,589 INFO L226 Difference]: Without dead ends: 145 [2021-06-12 19:22:50,589 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 283.3ms TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:22:50,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-06-12 19:22:50,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 109. [2021-06-12 19:22:50,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.0925925925925926) internal successors, (226), 108 states have internal predecessors, (226), 0 states have call successors, (0), 0 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 19:22:50,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 226 transitions. [2021-06-12 19:22:50,590 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 226 transitions. Word has length 19 [2021-06-12 19:22:50,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:50,590 INFO L482 AbstractCegarLoop]: Abstraction has 109 states and 226 transitions. [2021-06-12 19:22:50,590 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:50,590 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 226 transitions. [2021-06-12 19:22:50,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:22:50,591 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:50,591 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:50,791 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:50,791 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:50,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:50,791 INFO L82 PathProgramCache]: Analyzing trace with hash 42788626, now seen corresponding path program 178 times [2021-06-12 19:22:50,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:50,791 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274388910] [2021-06-12 19:22:50,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:50,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:50,873 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:50,873 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:50,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274388910] [2021-06-12 19:22:50,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274388910] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:50,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394197443] [2021-06-12 19:22:50,874 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 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:50,912 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:22:50,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:22:50,913 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 19:22:50,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:51,096 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:51,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394197443] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:51,096 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:51,097 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 19:22:51,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137654310] [2021-06-12 19:22:51,097 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:22:51,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:51,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:22:51,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:22:51,097 INFO L87 Difference]: Start difference. First operand 109 states and 226 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:51,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:51,393 INFO L93 Difference]: Finished difference Result 175 states and 335 transitions. [2021-06-12 19:22:51,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:22:51,393 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 19:22:51,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:51,393 INFO L225 Difference]: With dead ends: 175 [2021-06-12 19:22:51,393 INFO L226 Difference]: Without dead ends: 161 [2021-06-12 19:22:51,394 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 312.9ms TimeCoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:22:51,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-06-12 19:22:51,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 117. [2021-06-12 19:22:51,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 2.1206896551724137) internal successors, (246), 116 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 19:22:51,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 246 transitions. [2021-06-12 19:22:51,395 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 246 transitions. Word has length 19 [2021-06-12 19:22:51,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:51,395 INFO L482 AbstractCegarLoop]: Abstraction has 117 states and 246 transitions. [2021-06-12 19:22:51,395 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:51,395 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 246 transitions. [2021-06-12 19:22:51,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:22:51,395 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:51,395 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:51,596 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:51,596 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:51,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:51,596 INFO L82 PathProgramCache]: Analyzing trace with hash -339931762, now seen corresponding path program 179 times [2021-06-12 19:22:51,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:51,596 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107668788] [2021-06-12 19:22:51,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:51,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:51,671 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:51,671 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:51,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107668788] [2021-06-12 19:22:51,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107668788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:51,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14807675] [2021-06-12 19:22:51,671 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 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:51,692 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:22:51,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:22:51,692 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 19:22:51,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:51,863 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:51,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [14807675] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:51,863 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:51,863 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 19:22:51,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613002997] [2021-06-12 19:22:51,863 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:22:51,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:51,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:22:51,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:22:51,864 INFO L87 Difference]: Start difference. First operand 117 states and 246 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:52,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:52,168 INFO L93 Difference]: Finished difference Result 163 states and 326 transitions. [2021-06-12 19:22:52,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:22:52,168 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 19:22:52,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:52,169 INFO L225 Difference]: With dead ends: 163 [2021-06-12 19:22:52,169 INFO L226 Difference]: Without dead ends: 156 [2021-06-12 19:22:52,169 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 358.7ms TimeCoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2021-06-12 19:22:52,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-06-12 19:22:52,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 118. [2021-06-12 19:22:52,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 2.128205128205128) internal successors, (249), 117 states have internal predecessors, (249), 0 states have call successors, (0), 0 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 19:22:52,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 249 transitions. [2021-06-12 19:22:52,170 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 249 transitions. Word has length 19 [2021-06-12 19:22:52,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:52,170 INFO L482 AbstractCegarLoop]: Abstraction has 118 states and 249 transitions. [2021-06-12 19:22:52,170 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:52,170 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 249 transitions. [2021-06-12 19:22:52,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:22:52,170 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:52,170 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:52,371 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,188 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:52,371 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:52,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:52,371 INFO L82 PathProgramCache]: Analyzing trace with hash 1739362066, now seen corresponding path program 180 times [2021-06-12 19:22:52,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:52,371 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828310915] [2021-06-12 19:22:52,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:52,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:52,455 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:52,455 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:52,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828310915] [2021-06-12 19:22:52,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828310915] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:52,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155876483] [2021-06-12 19:22:52,455 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 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:52,476 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:22:52,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:22:52,477 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 19:22:52,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:52,646 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:52,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155876483] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:52,647 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:52,647 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 19:22:52,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341321761] [2021-06-12 19:22:52,647 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:22:52,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:52,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:22:52,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:22:52,647 INFO L87 Difference]: Start difference. First operand 118 states and 249 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:53,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:53,059 INFO L93 Difference]: Finished difference Result 208 states and 411 transitions. [2021-06-12 19:22:53,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 19:22:53,060 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 19:22:53,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:53,060 INFO L225 Difference]: With dead ends: 208 [2021-06-12 19:22:53,060 INFO L226 Difference]: Without dead ends: 201 [2021-06-12 19:22:53,060 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 388.4ms TimeCoverageRelationStatistics Valid=139, Invalid=617, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:22:53,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-06-12 19:22:53,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 119. [2021-06-12 19:22:53,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 2.1440677966101696) internal successors, (253), 118 states have internal predecessors, (253), 0 states have call successors, (0), 0 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 19:22:53,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 253 transitions. [2021-06-12 19:22:53,062 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 253 transitions. Word has length 19 [2021-06-12 19:22:53,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:53,062 INFO L482 AbstractCegarLoop]: Abstraction has 119 states and 253 transitions. [2021-06-12 19:22:53,062 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:53,062 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 253 transitions. [2021-06-12 19:22:53,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:22:53,062 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:53,062 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:53,272 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:53,273 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:53,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:53,273 INFO L82 PathProgramCache]: Analyzing trace with hash 1754822862, now seen corresponding path program 181 times [2021-06-12 19:22:53,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:53,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753320870] [2021-06-12 19:22:53,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:53,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:53,366 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:53,366 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:53,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753320870] [2021-06-12 19:22:53,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753320870] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:53,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300236298] [2021-06-12 19:22:53,367 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 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:53,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:53,387 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 19:22:53,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:53,716 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:53,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300236298] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:53,717 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:53,717 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 19:22:53,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83648508] [2021-06-12 19:22:53,717 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:22:53,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:53,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:22:53,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:22:53,717 INFO L87 Difference]: Start difference. First operand 119 states and 253 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:54,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:54,046 INFO L93 Difference]: Finished difference Result 198 states and 398 transitions. [2021-06-12 19:22:54,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:22:54,047 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 19:22:54,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:54,047 INFO L225 Difference]: With dead ends: 198 [2021-06-12 19:22:54,047 INFO L226 Difference]: Without dead ends: 191 [2021-06-12 19:22:54,047 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 347.2ms TimeCoverageRelationStatistics Valid=124, Invalid=526, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:22:54,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-06-12 19:22:54,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 117. [2021-06-12 19:22:54,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 2.1206896551724137) internal successors, (246), 116 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 19:22:54,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 246 transitions. [2021-06-12 19:22:54,048 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 246 transitions. Word has length 19 [2021-06-12 19:22:54,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:54,049 INFO L482 AbstractCegarLoop]: Abstraction has 117 states and 246 transitions. [2021-06-12 19:22:54,049 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:54,049 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 246 transitions. [2021-06-12 19:22:54,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:22:54,049 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:54,049 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:54,260 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2021-06-12 19:22:54,261 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:54,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:54,261 INFO L82 PathProgramCache]: Analyzing trace with hash -1932482486, now seen corresponding path program 182 times [2021-06-12 19:22:54,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:54,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823281289] [2021-06-12 19:22:54,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:54,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:54,337 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:54,337 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:54,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823281289] [2021-06-12 19:22:54,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823281289] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:54,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864369096] [2021-06-12 19:22:54,337 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 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:54,357 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:22:54,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:22:54,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:22:54,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:54,549 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:54,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [864369096] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:54,549 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:54,549 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 19:22:54,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068414364] [2021-06-12 19:22:54,550 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:22:54,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:54,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:22:54,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:22:54,550 INFO L87 Difference]: Start difference. First operand 117 states and 246 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:54,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:54,727 INFO L93 Difference]: Finished difference Result 164 states and 327 transitions. [2021-06-12 19:22:54,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:22:54,728 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 19:22:54,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:54,728 INFO L225 Difference]: With dead ends: 164 [2021-06-12 19:22:54,728 INFO L226 Difference]: Without dead ends: 157 [2021-06-12 19:22:54,728 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 259.7ms TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:22:54,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-06-12 19:22:54,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 116. [2021-06-12 19:22:54,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 2.1043478260869564) internal successors, (242), 115 states have internal predecessors, (242), 0 states have call successors, (0), 0 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 19:22:54,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 242 transitions. [2021-06-12 19:22:54,729 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 242 transitions. Word has length 19 [2021-06-12 19:22:54,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:54,729 INFO L482 AbstractCegarLoop]: Abstraction has 116 states and 242 transitions. [2021-06-12 19:22:54,729 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:54,730 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 242 transitions. [2021-06-12 19:22:54,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:22:54,730 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:54,730 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:54,938 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 191 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable190 [2021-06-12 19:22:54,938 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:54,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:54,939 INFO L82 PathProgramCache]: Analyzing trace with hash 672760770, now seen corresponding path program 183 times [2021-06-12 19:22:54,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:54,939 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440940598] [2021-06-12 19:22:54,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:54,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:55,014 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:55,015 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:55,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440940598] [2021-06-12 19:22:55,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440940598] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:55,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377372351] [2021-06-12 19:22:55,015 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 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:55,039 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 19:22:55,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:22:55,040 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 19:22:55,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:55,213 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:55,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [377372351] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:55,214 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:55,214 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 19:22:55,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195776349] [2021-06-12 19:22:55,214 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:22:55,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:55,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:22:55,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:22:55,214 INFO L87 Difference]: Start difference. First operand 116 states and 242 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:55,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:55,442 INFO L93 Difference]: Finished difference Result 135 states and 272 transitions. [2021-06-12 19:22:55,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:22:55,443 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 19:22:55,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:55,443 INFO L225 Difference]: With dead ends: 135 [2021-06-12 19:22:55,443 INFO L226 Difference]: Without dead ends: 128 [2021-06-12 19:22:55,443 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 299.9ms TimeCoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:22:55,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-06-12 19:22:55,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 112. [2021-06-12 19:22:55,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.108108108108108) internal successors, (234), 111 states have internal predecessors, (234), 0 states have call successors, (0), 0 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 19:22:55,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 234 transitions. [2021-06-12 19:22:55,445 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 234 transitions. Word has length 19 [2021-06-12 19:22:55,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:55,445 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 234 transitions. [2021-06-12 19:22:55,445 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:55,445 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 234 transitions. [2021-06-12 19:22:55,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:22:55,445 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:55,445 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:55,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:55,660 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:55,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:55,661 INFO L82 PathProgramCache]: Analyzing trace with hash -1542912698, now seen corresponding path program 184 times [2021-06-12 19:22:55,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:55,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925054651] [2021-06-12 19:22:55,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:55,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:55,754 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:55,754 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:55,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925054651] [2021-06-12 19:22:55,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925054651] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:55,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073394734] [2021-06-12 19:22:55,754 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 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:55,784 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:22:55,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:22:55,785 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 19:22:55,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:55,931 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:55,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073394734] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:55,931 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:55,932 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 19:22:55,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838974100] [2021-06-12 19:22:55,932 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:22:55,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:55,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:22:55,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:22:55,933 INFO L87 Difference]: Start difference. First operand 112 states and 234 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:56,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:56,266 INFO L93 Difference]: Finished difference Result 178 states and 353 transitions. [2021-06-12 19:22:56,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:22:56,266 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 19:22:56,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:56,266 INFO L225 Difference]: With dead ends: 178 [2021-06-12 19:22:56,267 INFO L226 Difference]: Without dead ends: 171 [2021-06-12 19:22:56,267 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 393.4ms TimeCoverageRelationStatistics Valid=138, Invalid=564, Unknown=0, NotChecked=0, Total=702 [2021-06-12 19:22:56,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-06-12 19:22:56,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 113. [2021-06-12 19:22:56,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.125) internal successors, (238), 112 states have internal predecessors, (238), 0 states have call successors, (0), 0 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 19:22:56,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 238 transitions. [2021-06-12 19:22:56,268 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 238 transitions. Word has length 19 [2021-06-12 19:22:56,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:56,268 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 238 transitions. [2021-06-12 19:22:56,268 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:56,268 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 238 transitions. [2021-06-12 19:22:56,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:22:56,268 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:56,268 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:56,472 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable192 [2021-06-12 19:22:56,473 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:56,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:56,473 INFO L82 PathProgramCache]: Analyzing trace with hash -1527451902, now seen corresponding path program 185 times [2021-06-12 19:22:56,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:56,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51086635] [2021-06-12 19:22:56,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:56,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:56,557 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:56,557 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:56,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51086635] [2021-06-12 19:22:56,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51086635] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:56,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946885241] [2021-06-12 19:22:56,557 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 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:56,578 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 19:22:56,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:22:56,578 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 19:22:56,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:56,738 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:56,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946885241] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:56,738 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:56,738 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 19:22:56,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862857131] [2021-06-12 19:22:56,739 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:22:56,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:56,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:22:56,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:22:56,739 INFO L87 Difference]: Start difference. First operand 113 states and 238 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:57,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:57,063 INFO L93 Difference]: Finished difference Result 170 states and 343 transitions. [2021-06-12 19:22:57,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:22:57,063 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 19:22:57,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:57,064 INFO L225 Difference]: With dead ends: 170 [2021-06-12 19:22:57,064 INFO L226 Difference]: Without dead ends: 163 [2021-06-12 19:22:57,064 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 333.9ms TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:22:57,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-06-12 19:22:57,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 111. [2021-06-12 19:22:57,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.1) internal successors, (231), 110 states have internal predecessors, (231), 0 states have call successors, (0), 0 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 19:22:57,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 231 transitions. [2021-06-12 19:22:57,065 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 231 transitions. Word has length 19 [2021-06-12 19:22:57,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:57,065 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 231 transitions. [2021-06-12 19:22:57,065 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:57,065 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 231 transitions. [2021-06-12 19:22:57,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:22:57,065 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:57,065 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:57,266 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:57,266 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:57,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:57,266 INFO L82 PathProgramCache]: Analyzing trace with hash 603258062, now seen corresponding path program 186 times [2021-06-12 19:22:57,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:57,266 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91358154] [2021-06-12 19:22:57,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:57,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:57,345 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:57,346 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:57,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91358154] [2021-06-12 19:22:57,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91358154] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:57,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524124895] [2021-06-12 19:22:57,346 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:57,368 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:22:57,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:22:57,369 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 19:22:57,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:57,532 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:57,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524124895] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:57,532 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:57,532 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 19:22:57,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841241287] [2021-06-12 19:22:57,533 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:22:57,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:57,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:22:57,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:22:57,533 INFO L87 Difference]: Start difference. First operand 111 states and 231 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:57,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:57,824 INFO L93 Difference]: Finished difference Result 170 states and 337 transitions. [2021-06-12 19:22:57,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:22:57,825 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 19:22:57,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:57,825 INFO L225 Difference]: With dead ends: 170 [2021-06-12 19:22:57,825 INFO L226 Difference]: Without dead ends: 163 [2021-06-12 19:22:57,825 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 306.7ms TimeCoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:22:57,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-06-12 19:22:57,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 113. [2021-06-12 19:22:57,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.125) internal successors, (238), 112 states have internal predecessors, (238), 0 states have call successors, (0), 0 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 19:22:57,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 238 transitions. [2021-06-12 19:22:57,826 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 238 transitions. Word has length 19 [2021-06-12 19:22:57,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:57,826 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 238 transitions. [2021-06-12 19:22:57,826 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:57,826 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 238 transitions. [2021-06-12 19:22:57,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:22:57,827 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:57,827 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:58,027 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable194 [2021-06-12 19:22:58,027 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:58,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:58,027 INFO L82 PathProgramCache]: Analyzing trace with hash 618718858, now seen corresponding path program 187 times [2021-06-12 19:22:58,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:58,027 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145944506] [2021-06-12 19:22:58,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:58,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:58,108 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:58,108 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:58,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145944506] [2021-06-12 19:22:58,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145944506] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:58,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488569672] [2021-06-12 19:22:58,108 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 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:58,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:58,128 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 19:22:58,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:58,580 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:58,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1488569672] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:58,580 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:58,580 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 19:22:58,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289222607] [2021-06-12 19:22:58,580 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:22:58,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:58,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:22:58,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:22:58,581 INFO L87 Difference]: Start difference. First operand 113 states and 238 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:58,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:58,893 INFO L93 Difference]: Finished difference Result 182 states and 358 transitions. [2021-06-12 19:22:58,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:22:58,893 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 19:22:58,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:58,893 INFO L225 Difference]: With dead ends: 182 [2021-06-12 19:22:58,893 INFO L226 Difference]: Without dead ends: 175 [2021-06-12 19:22:58,893 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 335.7ms TimeCoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:22:58,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-06-12 19:22:58,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 112. [2021-06-12 19:22:58,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.108108108108108) internal successors, (234), 111 states have internal predecessors, (234), 0 states have call successors, (0), 0 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 19:22:58,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 234 transitions. [2021-06-12 19:22:58,895 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 234 transitions. Word has length 19 [2021-06-12 19:22:58,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:58,895 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 234 transitions. [2021-06-12 19:22:58,895 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:58,895 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 234 transitions. [2021-06-12 19:22:58,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:22:58,895 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:58,895 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:59,095 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,196 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:59,095 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:59,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:59,096 INFO L82 PathProgramCache]: Analyzing trace with hash 1190173664, now seen corresponding path program 188 times [2021-06-12 19:22:59,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:59,096 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795804960] [2021-06-12 19:22:59,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:59,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:59,172 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:59,172 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:59,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795804960] [2021-06-12 19:22:59,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795804960] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:59,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863197562] [2021-06-12 19:22:59,172 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 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:59,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:22:59,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:22:59,193 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 19:22:59,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:59,537 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:59,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1863197562] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:59,537 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:59,537 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 19:22:59,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554237394] [2021-06-12 19:22:59,537 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:22:59,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:59,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:22:59,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:22:59,538 INFO L87 Difference]: Start difference. First operand 112 states and 234 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:59,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:59,850 INFO L93 Difference]: Finished difference Result 140 states and 281 transitions. [2021-06-12 19:22:59,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:22:59,850 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 19:22:59,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:59,850 INFO L225 Difference]: With dead ends: 140 [2021-06-12 19:22:59,850 INFO L226 Difference]: Without dead ends: 133 [2021-06-12 19:22:59,851 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 336.1ms TimeCoverageRelationStatistics Valid=112, Invalid=488, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:22:59,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-06-12 19:22:59,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 111. [2021-06-12 19:22:59,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.1) internal successors, (231), 110 states have internal predecessors, (231), 0 states have call successors, (0), 0 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 19:22:59,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 231 transitions. [2021-06-12 19:22:59,854 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 231 transitions. Word has length 19 [2021-06-12 19:22:59,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:59,854 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 231 transitions. [2021-06-12 19:22:59,854 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:59,854 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 231 transitions. [2021-06-12 19:22:59,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:22:59,854 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:59,854 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:23:00,054 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable196 [2021-06-12 19:23:00,055 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:23:00,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:23:00,055 INFO L82 PathProgramCache]: Analyzing trace with hash 668199066, now seen corresponding path program 189 times [2021-06-12 19:23:00,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:23:00,055 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624646636] [2021-06-12 19:23:00,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:23:00,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:23:00,130 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:00,130 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:23:00,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624646636] [2021-06-12 19:23:00,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624646636] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:00,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683588971] [2021-06-12 19:23:00,130 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 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:23:00,151 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 19:23:00,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:23:00,152 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 19:23:00,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:23:00,317 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:00,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [683588971] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:00,317 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:23:00,317 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 19:23:00,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338156736] [2021-06-12 19:23:00,317 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:23:00,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:23:00,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:23:00,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:23:00,318 INFO L87 Difference]: Start difference. First operand 111 states and 231 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:23:00,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:23:00,952 INFO L93 Difference]: Finished difference Result 201 states and 375 transitions. [2021-06-12 19:23:00,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 19:23:00,952 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-12 19:23:00,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:23:00,952 INFO L225 Difference]: With dead ends: 201 [2021-06-12 19:23:00,952 INFO L226 Difference]: Without dead ends: 154 [2021-06-12 19:23:00,952 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 603.0ms TimeCoverageRelationStatistics Valid=226, Invalid=1034, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 19:23:00,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-06-12 19:23:00,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 117. [2021-06-12 19:23:00,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 2.0948275862068964) internal successors, (243), 116 states have internal predecessors, (243), 0 states have call successors, (0), 0 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 19:23:00,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 243 transitions. [2021-06-12 19:23:00,954 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 243 transitions. Word has length 19 [2021-06-12 19:23:00,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:23:00,954 INFO L482 AbstractCegarLoop]: Abstraction has 117 states and 243 transitions. [2021-06-12 19:23:00,954 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:23:00,954 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 243 transitions. [2021-06-12 19:23:00,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:23:00,954 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:23:00,954 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:23:01,154 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,198 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:23:01,154 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:23:01,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:23:01,155 INFO L82 PathProgramCache]: Analyzing trace with hash 285478678, now seen corresponding path program 190 times [2021-06-12 19:23:01,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:23:01,155 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750154415] [2021-06-12 19:23:01,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:23:01,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:23:01,233 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:01,233 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:23:01,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750154415] [2021-06-12 19:23:01,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750154415] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:01,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166953237] [2021-06-12 19:23:01,233 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 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:23:01,253 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:23:01,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:23:01,254 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 19:23:01,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:23:01,445 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:01,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166953237] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:01,445 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:23:01,445 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 19:23:01,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935127316] [2021-06-12 19:23:01,445 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:23:01,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:23:01,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:23:01,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:23:01,446 INFO L87 Difference]: Start difference. First operand 117 states and 243 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:23:01,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:23:01,903 INFO L93 Difference]: Finished difference Result 161 states and 321 transitions. [2021-06-12 19:23:01,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 19:23:01,904 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-12 19:23:01,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:23:01,904 INFO L225 Difference]: With dead ends: 161 [2021-06-12 19:23:01,904 INFO L226 Difference]: Without dead ends: 154 [2021-06-12 19:23:01,904 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 424.8ms TimeCoverageRelationStatistics Valid=141, Invalid=729, Unknown=0, NotChecked=0, Total=870 [2021-06-12 19:23:01,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-06-12 19:23:01,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 113. [2021-06-12 19:23:01,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.0982142857142856) internal successors, (235), 112 states have internal predecessors, (235), 0 states have call successors, (0), 0 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 19:23:01,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 235 transitions. [2021-06-12 19:23:01,906 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 235 transitions. Word has length 19 [2021-06-12 19:23:01,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:23:01,906 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 235 transitions. [2021-06-12 19:23:01,906 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:23:01,906 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 235 transitions. [2021-06-12 19:23:01,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:23:01,906 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:23:01,906 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:23:02,106 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:23:02,106 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:23:02,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:23:02,107 INFO L82 PathProgramCache]: Analyzing trace with hash -1930194790, now seen corresponding path program 191 times [2021-06-12 19:23:02,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:23:02,107 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043596557] [2021-06-12 19:23:02,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:23:02,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:23:02,189 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:02,189 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:23:02,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043596557] [2021-06-12 19:23:02,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043596557] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:02,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154690177] [2021-06-12 19:23:02,190 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 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:23:02,210 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:23:02,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:23:02,211 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 19:23:02,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:23:02,393 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:02,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154690177] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:02,393 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:23:02,393 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 19:23:02,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33668209] [2021-06-12 19:23:02,393 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:23:02,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:23:02,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:23:02,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:23:02,394 INFO L87 Difference]: Start difference. First operand 113 states and 235 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:23:03,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:23:03,097 INFO L93 Difference]: Finished difference Result 220 states and 436 transitions. [2021-06-12 19:23:03,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 19:23:03,098 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-12 19:23:03,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:23:03,098 INFO L225 Difference]: With dead ends: 220 [2021-06-12 19:23:03,098 INFO L226 Difference]: Without dead ends: 213 [2021-06-12 19:23:03,098 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 589.4ms TimeCoverageRelationStatistics Valid=213, Invalid=1119, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 19:23:03,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-06-12 19:23:03,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 114. [2021-06-12 19:23:03,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.1150442477876106) internal successors, (239), 113 states have internal predecessors, (239), 0 states have call successors, (0), 0 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 19:23:03,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 239 transitions. [2021-06-12 19:23:03,100 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 239 transitions. Word has length 19 [2021-06-12 19:23:03,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:23:03,100 INFO L482 AbstractCegarLoop]: Abstraction has 114 states and 239 transitions. [2021-06-12 19:23:03,100 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:23:03,100 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 239 transitions. [2021-06-12 19:23:03,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:23:03,100 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:23:03,100 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:23:03,300 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2021-06-12 19:23:03,300 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:23:03,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:23:03,301 INFO L82 PathProgramCache]: Analyzing trace with hash -1914733994, now seen corresponding path program 192 times [2021-06-12 19:23:03,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:23:03,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826354040] [2021-06-12 19:23:03,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:23:03,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:23:03,419 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:03,419 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:23:03,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826354040] [2021-06-12 19:23:03,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826354040] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:03,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525224640] [2021-06-12 19:23:03,419 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 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:23:03,447 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:23:03,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:23:03,447 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 19:23:03,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:23:03,618 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:03,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525224640] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:03,618 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:23:03,618 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 19:23:03,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235796091] [2021-06-12 19:23:03,618 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:23:03,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:23:03,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:23:03,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:23:03,619 INFO L87 Difference]: Start difference. First operand 114 states and 239 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:23:04,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:23:04,246 INFO L93 Difference]: Finished difference Result 210 states and 423 transitions. [2021-06-12 19:23:04,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 19:23:04,247 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-12 19:23:04,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:23:04,247 INFO L225 Difference]: With dead ends: 210 [2021-06-12 19:23:04,247 INFO L226 Difference]: Without dead ends: 203 [2021-06-12 19:23:04,247 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 575.1ms TimeCoverageRelationStatistics Valid=213, Invalid=1193, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 19:23:04,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-06-12 19:23:04,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 109. [2021-06-12 19:23:04,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.0833333333333335) internal successors, (225), 108 states have internal predecessors, (225), 0 states have call successors, (0), 0 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 19:23:04,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 225 transitions. [2021-06-12 19:23:04,249 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 225 transitions. Word has length 19 [2021-06-12 19:23:04,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:23:04,249 INFO L482 AbstractCegarLoop]: Abstraction has 109 states and 225 transitions. [2021-06-12 19:23:04,249 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:23:04,249 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 225 transitions. [2021-06-12 19:23:04,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:23:04,249 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:23:04,249 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:23:04,449 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 201 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2021-06-12 19:23:04,449 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:23:04,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:23:04,450 INFO L82 PathProgramCache]: Analyzing trace with hash -206055594, now seen corresponding path program 193 times [2021-06-12 19:23:04,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:23:04,450 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702471432] [2021-06-12 19:23:04,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:23:04,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:23:04,533 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:04,533 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:23:04,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702471432] [2021-06-12 19:23:04,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702471432] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:04,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810586239] [2021-06-12 19:23:04,533 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:23:04,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:23:04,554 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 19:23:04,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:23:04,717 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:04,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810586239] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:04,718 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:23:04,718 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 19:23:04,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824542777] [2021-06-12 19:23:04,718 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:23:04,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:23:04,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:23:04,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:23:04,718 INFO L87 Difference]: Start difference. First operand 109 states and 225 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:23:05,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:23:05,023 INFO L93 Difference]: Finished difference Result 186 states and 351 transitions. [2021-06-12 19:23:05,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 19:23:05,023 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-12 19:23:05,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:23:05,023 INFO L225 Difference]: With dead ends: 186 [2021-06-12 19:23:05,023 INFO L226 Difference]: Without dead ends: 172 [2021-06-12 19:23:05,024 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 352.2ms TimeCoverageRelationStatistics Valid=116, Invalid=586, Unknown=0, NotChecked=0, Total=702 [2021-06-12 19:23:05,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-06-12 19:23:05,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 117. [2021-06-12 19:23:05,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 2.1120689655172415) internal successors, (245), 116 states have internal predecessors, (245), 0 states have call successors, (0), 0 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 19:23:05,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 245 transitions. [2021-06-12 19:23:05,025 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 245 transitions. Word has length 19 [2021-06-12 19:23:05,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:23:05,025 INFO L482 AbstractCegarLoop]: Abstraction has 117 states and 245 transitions. [2021-06-12 19:23:05,025 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:23:05,025 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 245 transitions. [2021-06-12 19:23:05,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:23:05,025 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:23:05,025 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:23:05,225 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2021-06-12 19:23:05,226 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:23:05,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:23:05,226 INFO L82 PathProgramCache]: Analyzing trace with hash -588775982, now seen corresponding path program 194 times [2021-06-12 19:23:05,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:23:05,226 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461510945] [2021-06-12 19:23:05,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:23:05,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:23:05,299 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:05,300 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:23:05,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461510945] [2021-06-12 19:23:05,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461510945] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:05,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324501550] [2021-06-12 19:23:05,300 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 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:23:05,320 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:23:05,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:23:05,320 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 19:23:05,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:23:05,519 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:05,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324501550] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:05,519 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:23:05,519 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 19:23:05,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830923355] [2021-06-12 19:23:05,520 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:23:05,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:23:05,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:23:05,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:23:05,520 INFO L87 Difference]: Start difference. First operand 117 states and 245 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:23:05,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:23:05,925 INFO L93 Difference]: Finished difference Result 170 states and 340 transitions. [2021-06-12 19:23:05,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:23:05,925 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-12 19:23:05,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:23:05,926 INFO L225 Difference]: With dead ends: 170 [2021-06-12 19:23:05,926 INFO L226 Difference]: Without dead ends: 163 [2021-06-12 19:23:05,926 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 397.9ms TimeCoverageRelationStatistics Valid=126, Invalid=686, Unknown=0, NotChecked=0, Total=812 [2021-06-12 19:23:05,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-06-12 19:23:05,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 118. [2021-06-12 19:23:05,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 2.1196581196581197) internal successors, (248), 117 states have internal predecessors, (248), 0 states have call successors, (0), 0 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 19:23:05,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 248 transitions. [2021-06-12 19:23:05,927 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 248 transitions. Word has length 19 [2021-06-12 19:23:05,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:23:05,927 INFO L482 AbstractCegarLoop]: Abstraction has 118 states and 248 transitions. [2021-06-12 19:23:05,927 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:23:05,927 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 248 transitions. [2021-06-12 19:23:05,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:23:05,928 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:23:05,928 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:23:06,128 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 203 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2021-06-12 19:23:06,128 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:23:06,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:23:06,128 INFO L82 PathProgramCache]: Analyzing trace with hash 1490517846, now seen corresponding path program 195 times [2021-06-12 19:23:06,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:23:06,128 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453322583] [2021-06-12 19:23:06,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:23:06,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:23:06,206 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:06,206 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:23:06,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453322583] [2021-06-12 19:23:06,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453322583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:06,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847467858] [2021-06-12 19:23:06,207 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 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:23:06,229 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 19:23:06,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:23:06,230 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 19:23:06,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:23:06,391 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:06,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1847467858] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:06,392 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:23:06,392 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 19:23:06,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336296601] [2021-06-12 19:23:06,392 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:23:06,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:23:06,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:23:06,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:23:06,392 INFO L87 Difference]: Start difference. First operand 118 states and 248 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:23:06,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:23:06,867 INFO L93 Difference]: Finished difference Result 217 states and 431 transitions. [2021-06-12 19:23:06,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 19:23:06,867 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-12 19:23:06,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:23:06,868 INFO L225 Difference]: With dead ends: 217 [2021-06-12 19:23:06,868 INFO L226 Difference]: Without dead ends: 210 [2021-06-12 19:23:06,868 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 451.2ms TimeCoverageRelationStatistics Valid=148, Invalid=722, Unknown=0, NotChecked=0, Total=870 [2021-06-12 19:23:06,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-06-12 19:23:06,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 119. [2021-06-12 19:23:06,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 2.135593220338983) internal successors, (252), 118 states have internal predecessors, (252), 0 states have call successors, (0), 0 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 19:23:06,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 252 transitions. [2021-06-12 19:23:06,869 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 252 transitions. Word has length 19 [2021-06-12 19:23:06,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:23:06,869 INFO L482 AbstractCegarLoop]: Abstraction has 119 states and 252 transitions. [2021-06-12 19:23:06,869 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:23:06,869 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 252 transitions. [2021-06-12 19:23:06,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:23:06,870 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:23:06,870 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:23:07,085 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable203 [2021-06-12 19:23:07,086 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:23:07,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:23:07,086 INFO L82 PathProgramCache]: Analyzing trace with hash 1505978642, now seen corresponding path program 196 times [2021-06-12 19:23:07,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:23:07,086 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353138320] [2021-06-12 19:23:07,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:23:07,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:23:07,167 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:07,167 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:23:07,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353138320] [2021-06-12 19:23:07,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353138320] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:07,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963668093] [2021-06-12 19:23:07,167 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 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:23:07,187 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:23:07,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:23:07,188 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 19:23:07,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:23:07,360 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:07,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963668093] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:07,361 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:23:07,361 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 19:23:07,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384071208] [2021-06-12 19:23:07,361 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:23:07,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:23:07,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:23:07,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:23:07,361 INFO L87 Difference]: Start difference. First operand 119 states and 252 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:23:07,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:23:07,787 INFO L93 Difference]: Finished difference Result 206 states and 418 transitions. [2021-06-12 19:23:07,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 19:23:07,788 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-12 19:23:07,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:23:07,788 INFO L225 Difference]: With dead ends: 206 [2021-06-12 19:23:07,788 INFO L226 Difference]: Without dead ends: 199 [2021-06-12 19:23:07,788 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 374.3ms TimeCoverageRelationStatistics Valid=133, Invalid=623, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:23:07,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-06-12 19:23:07,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 116. [2021-06-12 19:23:07,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 2.0956521739130434) internal successors, (241), 115 states have internal predecessors, (241), 0 states have call successors, (0), 0 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 19:23:07,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 241 transitions. [2021-06-12 19:23:07,790 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 241 transitions. Word has length 19 [2021-06-12 19:23:07,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:23:07,790 INFO L482 AbstractCegarLoop]: Abstraction has 116 states and 241 transitions. [2021-06-12 19:23:07,790 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:23:07,790 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 241 transitions. [2021-06-12 19:23:07,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:23:07,790 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:23:07,790 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:23:07,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:23:07,993 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:23:07,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:23:07,993 INFO L82 PathProgramCache]: Analyzing trace with hash 423916550, now seen corresponding path program 197 times [2021-06-12 19:23:07,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:23:07,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270345579] [2021-06-12 19:23:07,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:23:07,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:23:08,079 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:08,079 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:23:08,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270345579] [2021-06-12 19:23:08,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270345579] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:08,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279435222] [2021-06-12 19:23:08,079 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 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:23:08,099 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 19:23:08,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:23:08,100 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 19:23:08,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:23:08,290 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:08,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279435222] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:08,290 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:23:08,290 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 19:23:08,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137323050] [2021-06-12 19:23:08,290 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:23:08,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:23:08,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:23:08,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:23:08,291 INFO L87 Difference]: Start difference. First operand 116 states and 241 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:23:08,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:23:08,556 INFO L93 Difference]: Finished difference Result 145 states and 290 transitions. [2021-06-12 19:23:08,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:23:08,557 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-12 19:23:08,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:23:08,557 INFO L225 Difference]: With dead ends: 145 [2021-06-12 19:23:08,557 INFO L226 Difference]: Without dead ends: 138 [2021-06-12 19:23:08,557 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 340.9ms TimeCoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:23:08,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-06-12 19:23:08,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 112. [2021-06-12 19:23:08,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.099099099099099) internal successors, (233), 111 states have internal predecessors, (233), 0 states have call successors, (0), 0 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 19:23:08,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 233 transitions. [2021-06-12 19:23:08,558 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 233 transitions. Word has length 19 [2021-06-12 19:23:08,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:23:08,558 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 233 transitions. [2021-06-12 19:23:08,558 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:23:08,558 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 233 transitions. [2021-06-12 19:23:08,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:23:08,559 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:23:08,559 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:23:08,780 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable205 [2021-06-12 19:23:08,780 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:23:08,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:23:08,781 INFO L82 PathProgramCache]: Analyzing trace with hash -1791756918, now seen corresponding path program 198 times [2021-06-12 19:23:08,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:23:08,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085648031] [2021-06-12 19:23:08,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:23:08,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:23:08,857 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:08,858 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:23:08,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085648031] [2021-06-12 19:23:08,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085648031] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:08,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682675675] [2021-06-12 19:23:08,858 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 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:23:08,878 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:23:08,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:23:08,879 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 19:23:08,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:23:09,058 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:09,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682675675] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:09,058 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:23:09,058 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 19:23:09,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983332253] [2021-06-12 19:23:09,058 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:23:09,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:23:09,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:23:09,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:23:09,059 INFO L87 Difference]: Start difference. First operand 112 states and 233 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:23:09,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:23:09,456 INFO L93 Difference]: Finished difference Result 190 states and 377 transitions. [2021-06-12 19:23:09,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 19:23:09,456 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-12 19:23:09,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:23:09,457 INFO L225 Difference]: With dead ends: 190 [2021-06-12 19:23:09,457 INFO L226 Difference]: Without dead ends: 183 [2021-06-12 19:23:09,457 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 416.3ms TimeCoverageRelationStatistics Valid=149, Invalid=663, Unknown=0, NotChecked=0, Total=812 [2021-06-12 19:23:09,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-06-12 19:23:09,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 113. [2021-06-12 19:23:09,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.1160714285714284) internal successors, (237), 112 states have internal predecessors, (237), 0 states have call successors, (0), 0 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 19:23:09,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 237 transitions. [2021-06-12 19:23:09,460 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 237 transitions. Word has length 19 [2021-06-12 19:23:09,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:23:09,460 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 237 transitions. [2021-06-12 19:23:09,460 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:23:09,460 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 237 transitions. [2021-06-12 19:23:09,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:23:09,461 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:23:09,461 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:23:09,661 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable206 [2021-06-12 19:23:09,661 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:23:09,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:23:09,661 INFO L82 PathProgramCache]: Analyzing trace with hash -1776296122, now seen corresponding path program 199 times [2021-06-12 19:23:09,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:23:09,662 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377201019] [2021-06-12 19:23:09,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:23:09,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:23:09,746 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:09,747 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:23:09,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377201019] [2021-06-12 19:23:09,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377201019] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:09,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385078204] [2021-06-12 19:23:09,747 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 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:23:09,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:23:09,767 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 19:23:09,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:23:10,057 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:10,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1385078204] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:10,057 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:23:10,057 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 19:23:10,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961362667] [2021-06-12 19:23:10,058 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:23:10,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:23:10,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:23:10,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:23:10,058 INFO L87 Difference]: Start difference. First operand 113 states and 237 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:23:10,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:23:10,430 INFO L93 Difference]: Finished difference Result 181 states and 367 transitions. [2021-06-12 19:23:10,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:23:10,430 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-12 19:23:10,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:23:10,430 INFO L225 Difference]: With dead ends: 181 [2021-06-12 19:23:10,430 INFO L226 Difference]: Without dead ends: 174 [2021-06-12 19:23:10,430 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 402.6ms TimeCoverageRelationStatistics Valid=139, Invalid=563, Unknown=0, NotChecked=0, Total=702 [2021-06-12 19:23:10,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-06-12 19:23:10,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 111. [2021-06-12 19:23:10,432 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 19:23:10,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 230 transitions. [2021-06-12 19:23:10,432 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 230 transitions. Word has length 19 [2021-06-12 19:23:10,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:23:10,432 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 230 transitions. [2021-06-12 19:23:10,432 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:23:10,432 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 230 transitions. [2021-06-12 19:23:10,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:23:10,432 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:23:10,432 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:23:10,640 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:23:10,641 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:23:10,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:23:10,641 INFO L82 PathProgramCache]: Analyzing trace with hash 354413842, now seen corresponding path program 200 times [2021-06-12 19:23:10,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:23:10,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980271587] [2021-06-12 19:23:10,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:23:10,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:23:10,719 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:10,720 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:23:10,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980271587] [2021-06-12 19:23:10,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980271587] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:10,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858755664] [2021-06-12 19:23:10,720 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 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:23:10,741 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:23:10,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:23:10,741 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 19:23:10,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:23:10,925 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:10,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858755664] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:10,925 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:23:10,925 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 19:23:10,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502950377] [2021-06-12 19:23:10,925 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:23:10,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:23:10,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:23:10,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:23:10,926 INFO L87 Difference]: Start difference. First operand 111 states and 230 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:23:11,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:23:11,266 INFO L93 Difference]: Finished difference Result 186 states and 370 transitions. [2021-06-12 19:23:11,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 19:23:11,266 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-12 19:23:11,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:23:11,266 INFO L225 Difference]: With dead ends: 186 [2021-06-12 19:23:11,266 INFO L226 Difference]: Without dead ends: 179 [2021-06-12 19:23:11,266 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 352.7ms TimeCoverageRelationStatistics Valid=123, Invalid=527, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:23:11,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-06-12 19:23:11,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 113. [2021-06-12 19:23:11,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.1160714285714284) internal successors, (237), 112 states have internal predecessors, (237), 0 states have call successors, (0), 0 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 19:23:11,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 237 transitions. [2021-06-12 19:23:11,268 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 237 transitions. Word has length 19 [2021-06-12 19:23:11,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:23:11,268 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 237 transitions. [2021-06-12 19:23:11,268 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:23:11,268 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 237 transitions. [2021-06-12 19:23:11,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:23:11,268 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:23:11,268 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:23:11,468 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable208 [2021-06-12 19:23:11,469 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:23:11,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:23:11,469 INFO L82 PathProgramCache]: Analyzing trace with hash 369874638, now seen corresponding path program 201 times [2021-06-12 19:23:11,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:23:11,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221571268] [2021-06-12 19:23:11,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:23:11,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:23:11,547 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:11,547 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:23:11,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221571268] [2021-06-12 19:23:11,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221571268] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:11,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768429478] [2021-06-12 19:23:11,548 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 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:23:11,568 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 19:23:11,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:23:11,569 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 19:23:11,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:23:11,742 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:11,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768429478] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:11,742 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:23:11,742 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 19:23:11,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443868208] [2021-06-12 19:23:11,743 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:23:11,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:23:11,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:23:11,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:23:11,743 INFO L87 Difference]: Start difference. First operand 113 states and 237 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:23:12,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:23:12,048 INFO L93 Difference]: Finished difference Result 199 states and 393 transitions. [2021-06-12 19:23:12,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 19:23:12,049 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-12 19:23:12,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:23:12,049 INFO L225 Difference]: With dead ends: 199 [2021-06-12 19:23:12,049 INFO L226 Difference]: Without dead ends: 192 [2021-06-12 19:23:12,049 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 337.1ms TimeCoverageRelationStatistics Valid=130, Invalid=520, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:23:12,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-06-12 19:23:12,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 112. [2021-06-12 19:23:12,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.099099099099099) internal successors, (233), 111 states have internal predecessors, (233), 0 states have call successors, (0), 0 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 19:23:12,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 233 transitions. [2021-06-12 19:23:12,051 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 233 transitions. Word has length 19 [2021-06-12 19:23:12,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:23:12,051 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 233 transitions. [2021-06-12 19:23:12,051 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:23:12,051 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 233 transitions. [2021-06-12 19:23:12,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:23:12,051 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:23:12,051 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:23:12,251 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable209 [2021-06-12 19:23:12,252 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:23:12,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:23:12,252 INFO L82 PathProgramCache]: Analyzing trace with hash 941329444, now seen corresponding path program 202 times [2021-06-12 19:23:12,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:23:12,252 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587746085] [2021-06-12 19:23:12,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:23:12,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:23:12,329 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:12,329 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:23:12,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587746085] [2021-06-12 19:23:12,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587746085] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:12,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386563914] [2021-06-12 19:23:12,329 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 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:23:12,349 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:23:12,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:23:12,350 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 19:23:12,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:23:12,643 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:12,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1386563914] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:12,643 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:23:12,643 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 19:23:12,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13517692] [2021-06-12 19:23:12,644 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:23:12,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:23:12,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:23:12,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:23:12,644 INFO L87 Difference]: Start difference. First operand 112 states and 233 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:23:12,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:23:12,950 INFO L93 Difference]: Finished difference Result 152 states and 303 transitions. [2021-06-12 19:23:12,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 19:23:12,950 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-12 19:23:12,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:23:12,951 INFO L225 Difference]: With dead ends: 152 [2021-06-12 19:23:12,951 INFO L226 Difference]: Without dead ends: 145 [2021-06-12 19:23:12,951 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 371.1ms TimeCoverageRelationStatistics Valid=123, Invalid=579, Unknown=0, NotChecked=0, Total=702 [2021-06-12 19:23:12,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-06-12 19:23:12,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 107. [2021-06-12 19:23:12,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 2.0849056603773586) internal successors, (221), 106 states have internal predecessors, (221), 0 states have call successors, (0), 0 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 19:23:12,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 221 transitions. [2021-06-12 19:23:12,952 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 221 transitions. Word has length 19 [2021-06-12 19:23:12,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:23:12,952 INFO L482 AbstractCegarLoop]: Abstraction has 107 states and 221 transitions. [2021-06-12 19:23:12,952 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:23:12,952 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 221 transitions. [2021-06-12 19:23:12,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:23:12,952 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:23:12,952 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:23:13,153 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable210,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:23:13,153 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:23:13,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:23:13,153 INFO L82 PathProgramCache]: Analyzing trace with hash 1487538330, now seen corresponding path program 203 times [2021-06-12 19:23:13,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:23:13,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530147428] [2021-06-12 19:23:13,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:23:13,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:23:13,228 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:13,229 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:23:13,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530147428] [2021-06-12 19:23:13,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530147428] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:13,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214379421] [2021-06-12 19:23:13,229 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 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:23:13,249 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 19:23:13,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:23:13,250 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 19:23:13,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:23:13,437 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:13,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214379421] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:13,437 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:23:13,437 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 19:23:13,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739367980] [2021-06-12 19:23:13,437 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:23:13,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:23:13,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:23:13,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:23:13,438 INFO L87 Difference]: Start difference. First operand 107 states and 221 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:23:13,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:23:13,791 INFO L93 Difference]: Finished difference Result 185 states and 345 transitions. [2021-06-12 19:23:13,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:23:13,791 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-12 19:23:13,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:23:13,792 INFO L225 Difference]: With dead ends: 185 [2021-06-12 19:23:13,792 INFO L226 Difference]: Without dead ends: 171 [2021-06-12 19:23:13,792 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 351.3ms TimeCoverageRelationStatistics Valid=119, Invalid=637, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:23:13,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-06-12 19:23:13,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 113. [2021-06-12 19:23:13,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.0892857142857144) internal successors, (234), 112 states have internal predecessors, (234), 0 states have call successors, (0), 0 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 19:23:13,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 234 transitions. [2021-06-12 19:23:13,793 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 234 transitions. Word has length 19 [2021-06-12 19:23:13,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:23:13,793 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 234 transitions. [2021-06-12 19:23:13,793 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:23:13,793 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 234 transitions. [2021-06-12 19:23:13,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:23:13,793 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:23:13,793 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:23:13,994 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2021-06-12 19:23:13,994 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:23:13,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:23:13,994 INFO L82 PathProgramCache]: Analyzing trace with hash 1104817942, now seen corresponding path program 204 times [2021-06-12 19:23:13,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:23:13,994 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006769097] [2021-06-12 19:23:13,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:23:13,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:23:14,068 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:14,069 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:23:14,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006769097] [2021-06-12 19:23:14,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006769097] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:14,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377015610] [2021-06-12 19:23:14,069 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 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:23:14,089 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:23:14,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:23:14,090 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 19:23:14,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:23:14,271 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:14,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [377015610] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:14,271 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:23:14,271 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 19:23:14,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135375687] [2021-06-12 19:23:14,271 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:23:14,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:23:14,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:23:14,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:23:14,271 INFO L87 Difference]: Start difference. First operand 113 states and 234 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:23:14,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:23:14,653 INFO L93 Difference]: Finished difference Result 170 states and 336 transitions. [2021-06-12 19:23:14,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 19:23:14,653 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-12 19:23:14,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:23:14,653 INFO L225 Difference]: With dead ends: 170 [2021-06-12 19:23:14,653 INFO L226 Difference]: Without dead ends: 163 [2021-06-12 19:23:14,654 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 394.5ms TimeCoverageRelationStatistics Valid=131, Invalid=739, Unknown=0, NotChecked=0, Total=870 [2021-06-12 19:23:14,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-06-12 19:23:14,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 114. [2021-06-12 19:23:14,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.0973451327433628) internal successors, (237), 113 states have internal predecessors, (237), 0 states have call successors, (0), 0 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 19:23:14,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 237 transitions. [2021-06-12 19:23:14,655 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 237 transitions. Word has length 19 [2021-06-12 19:23:14,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:23:14,655 INFO L482 AbstractCegarLoop]: Abstraction has 114 states and 237 transitions. [2021-06-12 19:23:14,655 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:23:14,655 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 237 transitions. [2021-06-12 19:23:14,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:23:14,655 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:23:14,655 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:23:14,855 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable212,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:23:14,856 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:23:14,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:23:14,856 INFO L82 PathProgramCache]: Analyzing trace with hash -1110855526, now seen corresponding path program 205 times [2021-06-12 19:23:14,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:23:14,856 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40515403] [2021-06-12 19:23:14,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:23:14,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:23:14,934 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:14,934 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:23:14,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40515403] [2021-06-12 19:23:14,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40515403] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:14,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044280277] [2021-06-12 19:23:14,934 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 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:23:14,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:23:14,954 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 19:23:14,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:23:15,194 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:15,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044280277] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:15,195 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:23:15,195 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 19:23:15,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228634340] [2021-06-12 19:23:15,195 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:23:15,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:23:15,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:23:15,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:23:15,195 INFO L87 Difference]: Start difference. First operand 114 states and 237 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:23:15,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:23:15,796 INFO L93 Difference]: Finished difference Result 217 states and 427 transitions. [2021-06-12 19:23:15,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 19:23:15,796 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-12 19:23:15,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:23:15,797 INFO L225 Difference]: With dead ends: 217 [2021-06-12 19:23:15,797 INFO L226 Difference]: Without dead ends: 210 [2021-06-12 19:23:15,797 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 515.1ms TimeCoverageRelationStatistics Valid=153, Invalid=777, Unknown=0, NotChecked=0, Total=930 [2021-06-12 19:23:15,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-06-12 19:23:15,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 115. [2021-06-12 19:23:15,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.1140350877192984) internal successors, (241), 114 states have internal predecessors, (241), 0 states have call successors, (0), 0 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 19:23:15,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 241 transitions. [2021-06-12 19:23:15,798 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 241 transitions. Word has length 19 [2021-06-12 19:23:15,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:23:15,798 INFO L482 AbstractCegarLoop]: Abstraction has 115 states and 241 transitions. [2021-06-12 19:23:15,798 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:23:15,798 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 241 transitions. [2021-06-12 19:23:15,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:23:15,798 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:23:15,798 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:23:15,999 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2021-06-12 19:23:15,999 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:23:15,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:23:15,999 INFO L82 PathProgramCache]: Analyzing trace with hash -1095394730, now seen corresponding path program 206 times [2021-06-12 19:23:15,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:23:15,999 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407217110] [2021-06-12 19:23:15,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:23:16,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:23:16,079 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:16,079 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:23:16,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407217110] [2021-06-12 19:23:16,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407217110] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:16,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381728030] [2021-06-12 19:23:16,079 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 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:23:16,099 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:23:16,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:23:16,100 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 19:23:16,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:23:16,273 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:16,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381728030] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:16,274 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:23:16,274 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 19:23:16,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881769971] [2021-06-12 19:23:16,274 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:23:16,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:23:16,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:23:16,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:23:16,274 INFO L87 Difference]: Start difference. First operand 115 states and 241 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:23:16,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:23:16,746 INFO L93 Difference]: Finished difference Result 206 states and 414 transitions. [2021-06-12 19:23:16,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 19:23:16,747 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-12 19:23:16,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:23:16,747 INFO L225 Difference]: With dead ends: 206 [2021-06-12 19:23:16,747 INFO L226 Difference]: Without dead ends: 199 [2021-06-12 19:23:16,747 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 387.3ms TimeCoverageRelationStatistics Valid=138, Invalid=674, Unknown=0, NotChecked=0, Total=812 [2021-06-12 19:23:16,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-06-12 19:23:16,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 112. [2021-06-12 19:23:16,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.0720720720720722) internal successors, (230), 111 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 19:23:16,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 230 transitions. [2021-06-12 19:23:16,756 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 230 transitions. Word has length 19 [2021-06-12 19:23:16,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:23:16,756 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 230 transitions. [2021-06-12 19:23:16,756 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:23:16,756 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 230 transitions. [2021-06-12 19:23:16,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:23:16,756 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:23:16,756 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:23:16,956 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:23:16,956 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:23:16,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:23:16,957 INFO L82 PathProgramCache]: Analyzing trace with hash 2117510474, now seen corresponding path program 207 times [2021-06-12 19:23:16,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:23:16,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733195435] [2021-06-12 19:23:16,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:23:16,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:23:17,030 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:17,030 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:23:17,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733195435] [2021-06-12 19:23:17,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733195435] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:17,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376997364] [2021-06-12 19:23:17,030 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 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:23:17,050 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 19:23:17,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:23:17,051 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 19:23:17,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:23:17,234 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:17,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376997364] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:17,235 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:23:17,235 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 19:23:17,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823215706] [2021-06-12 19:23:17,235 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:23:17,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:23:17,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:23:17,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:23:17,235 INFO L87 Difference]: Start difference. First operand 112 states and 230 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:23:17,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:23:17,565 INFO L93 Difference]: Finished difference Result 150 states and 297 transitions. [2021-06-12 19:23:17,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 19:23:17,565 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-12 19:23:17,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:23:17,566 INFO L225 Difference]: With dead ends: 150 [2021-06-12 19:23:17,566 INFO L226 Difference]: Without dead ends: 143 [2021-06-12 19:23:17,566 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 348.2ms TimeCoverageRelationStatistics Valid=112, Invalid=590, Unknown=0, NotChecked=0, Total=702 [2021-06-12 19:23:17,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-06-12 19:23:17,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 114. [2021-06-12 19:23:17,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.079646017699115) internal successors, (235), 113 states have internal predecessors, (235), 0 states have call successors, (0), 0 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 19:23:17,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 235 transitions. [2021-06-12 19:23:17,567 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 235 transitions. Word has length 19 [2021-06-12 19:23:17,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:23:17,567 INFO L482 AbstractCegarLoop]: Abstraction has 114 states and 235 transitions. [2021-06-12 19:23:17,567 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:23:17,567 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 235 transitions. [2021-06-12 19:23:17,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:23:17,567 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:23:17,567 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:23:17,768 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable215 [2021-06-12 19:23:17,768 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:23:17,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:23:17,768 INFO L82 PathProgramCache]: Analyzing trace with hash -98162994, now seen corresponding path program 208 times [2021-06-12 19:23:17,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:23:17,768 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280471582] [2021-06-12 19:23:17,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:23:17,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:23:17,848 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:17,848 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:23:17,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280471582] [2021-06-12 19:23:17,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280471582] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:17,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752081106] [2021-06-12 19:23:17,849 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 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:23:17,870 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:23:17,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:23:17,871 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 19:23:17,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:23:18,062 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:18,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752081106] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:18,062 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:23:18,062 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 19:23:18,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903605404] [2021-06-12 19:23:18,062 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:23:18,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:23:18,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:23:18,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:23:18,063 INFO L87 Difference]: Start difference. First operand 114 states and 235 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:23:18,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:23:18,541 INFO L93 Difference]: Finished difference Result 195 states and 384 transitions. [2021-06-12 19:23:18,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 19:23:18,542 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-12 19:23:18,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:23:18,542 INFO L225 Difference]: With dead ends: 195 [2021-06-12 19:23:18,542 INFO L226 Difference]: Without dead ends: 188 [2021-06-12 19:23:18,542 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 467.0ms TimeCoverageRelationStatistics Valid=153, Invalid=717, Unknown=0, NotChecked=0, Total=870 [2021-06-12 19:23:18,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-06-12 19:23:18,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 115. [2021-06-12 19:23:18,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.0964912280701755) internal successors, (239), 114 states have internal predecessors, (239), 0 states have call successors, (0), 0 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 19:23:18,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 239 transitions. [2021-06-12 19:23:18,544 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 239 transitions. Word has length 19 [2021-06-12 19:23:18,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:23:18,544 INFO L482 AbstractCegarLoop]: Abstraction has 115 states and 239 transitions. [2021-06-12 19:23:18,544 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:23:18,544 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 239 transitions. [2021-06-12 19:23:18,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:23:18,544 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:23:18,544 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:23:18,744 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable216 [2021-06-12 19:23:18,744 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:23:18,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:23:18,745 INFO L82 PathProgramCache]: Analyzing trace with hash -82702198, now seen corresponding path program 209 times [2021-06-12 19:23:18,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:23:18,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184950272] [2021-06-12 19:23:18,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:23:18,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:23:18,823 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:18,823 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:23:18,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184950272] [2021-06-12 19:23:18,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184950272] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:18,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562554296] [2021-06-12 19:23:18,823 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 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:23:18,845 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:23:18,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:23:18,846 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 19:23:18,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:23:19,036 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:19,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562554296] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:19,036 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:23:19,036 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 19:23:19,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647124139] [2021-06-12 19:23:19,036 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:23:19,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:23:19,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:23:19,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:23:19,037 INFO L87 Difference]: Start difference. First operand 115 states and 239 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:23:19,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:23:19,442 INFO L93 Difference]: Finished difference Result 186 states and 374 transitions. [2021-06-12 19:23:19,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 19:23:19,442 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-12 19:23:19,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:23:19,443 INFO L225 Difference]: With dead ends: 186 [2021-06-12 19:23:19,443 INFO L226 Difference]: Without dead ends: 179 [2021-06-12 19:23:19,443 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 392.7ms TimeCoverageRelationStatistics Valid=143, Invalid=613, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:23:19,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-06-12 19:23:19,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 113. [2021-06-12 19:23:19,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.0714285714285716) internal successors, (232), 112 states have internal predecessors, (232), 0 states have call successors, (0), 0 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 19:23:19,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 232 transitions. [2021-06-12 19:23:19,444 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 232 transitions. Word has length 19 [2021-06-12 19:23:19,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:23:19,444 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 232 transitions. [2021-06-12 19:23:19,444 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:23:19,444 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 232 transitions. [2021-06-12 19:23:19,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:23:19,445 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:23:19,445 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:23:19,645 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable217,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:23:19,645 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:23:19,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:23:19,645 INFO L82 PathProgramCache]: Analyzing trace with hash 2048007766, now seen corresponding path program 210 times [2021-06-12 19:23:19,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:23:19,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220079283] [2021-06-12 19:23:19,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:23:19,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:23:19,724 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:19,724 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:23:19,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220079283] [2021-06-12 19:23:19,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220079283] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:19,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116373149] [2021-06-12 19:23:19,725 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 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:23:19,745 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:23:19,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:23:19,746 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 19:23:19,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:23:19,985 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:19,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1116373149] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:19,986 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:23:19,986 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 19:23:19,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472336275] [2021-06-12 19:23:19,986 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:23:19,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:23:19,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:23:19,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:23:19,986 INFO L87 Difference]: Start difference. First operand 113 states and 232 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:23:20,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:23:20,417 INFO L93 Difference]: Finished difference Result 195 states and 385 transitions. [2021-06-12 19:23:20,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:23:20,417 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-12 19:23:20,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:23:20,417 INFO L225 Difference]: With dead ends: 195 [2021-06-12 19:23:20,417 INFO L226 Difference]: Without dead ends: 188 [2021-06-12 19:23:20,418 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 418.0ms TimeCoverageRelationStatistics Valid=127, Invalid=575, Unknown=0, NotChecked=0, Total=702 [2021-06-12 19:23:20,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-06-12 19:23:20,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 115. [2021-06-12 19:23:20,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.0964912280701755) internal successors, (239), 114 states have internal predecessors, (239), 0 states have call successors, (0), 0 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 19:23:20,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 239 transitions. [2021-06-12 19:23:20,419 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 239 transitions. Word has length 19 [2021-06-12 19:23:20,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:23:20,419 INFO L482 AbstractCegarLoop]: Abstraction has 115 states and 239 transitions. [2021-06-12 19:23:20,419 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:23:20,419 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 239 transitions. [2021-06-12 19:23:20,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:23:20,419 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:23:20,419 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:23:20,620 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable218 [2021-06-12 19:23:20,620 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:23:20,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:23:20,620 INFO L82 PathProgramCache]: Analyzing trace with hash 2063468562, now seen corresponding path program 211 times [2021-06-12 19:23:20,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:23:20,620 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931915935] [2021-06-12 19:23:20,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:23:20,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:23:20,701 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:20,701 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:23:20,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931915935] [2021-06-12 19:23:20,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931915935] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:20,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342600908] [2021-06-12 19:23:20,701 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 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:23:20,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:23:20,722 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 19:23:20,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:23:21,009 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:21,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342600908] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:21,009 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:23:21,009 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 19:23:21,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746096364] [2021-06-12 19:23:21,010 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:23:21,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:23:21,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:23:21,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:23:21,010 INFO L87 Difference]: Start difference. First operand 115 states and 239 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:23:21,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:23:21,416 INFO L93 Difference]: Finished difference Result 209 states and 410 transitions. [2021-06-12 19:23:21,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:23:21,417 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-12 19:23:21,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:23:21,417 INFO L225 Difference]: With dead ends: 209 [2021-06-12 19:23:21,417 INFO L226 Difference]: Without dead ends: 202 [2021-06-12 19:23:21,417 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 389.4ms TimeCoverageRelationStatistics Valid=134, Invalid=568, Unknown=0, NotChecked=0, Total=702 [2021-06-12 19:23:21,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-06-12 19:23:21,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 114. [2021-06-12 19:23:21,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.079646017699115) internal successors, (235), 113 states have internal predecessors, (235), 0 states have call successors, (0), 0 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 19:23:21,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 235 transitions. [2021-06-12 19:23:21,419 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 235 transitions. Word has length 19 [2021-06-12 19:23:21,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:23:21,419 INFO L482 AbstractCegarLoop]: Abstraction has 114 states and 235 transitions. [2021-06-12 19:23:21,419 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:23:21,419 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 235 transitions. [2021-06-12 19:23:21,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:23:21,419 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:23:21,419 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:23:21,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219,220 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:23:21,633 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:23:21,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:23:21,633 INFO L82 PathProgramCache]: Analyzing trace with hash -1660043928, now seen corresponding path program 212 times [2021-06-12 19:23:21,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:23:21,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732461867] [2021-06-12 19:23:21,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:23:21,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:23:21,712 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:21,712 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:23:21,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732461867] [2021-06-12 19:23:21,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732461867] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:21,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032449026] [2021-06-12 19:23:21,712 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 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:23:21,732 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:23:21,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:23:21,733 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 19:23:21,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:23:22,022 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:22,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032449026] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:22,022 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:23:22,022 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 19:23:22,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574449583] [2021-06-12 19:23:22,022 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:23:22,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:23:22,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:23:22,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:23:22,022 INFO L87 Difference]: Start difference. First operand 114 states and 235 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:23:22,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:23:22,363 INFO L93 Difference]: Finished difference Result 162 states and 320 transitions. [2021-06-12 19:23:22,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:23:22,364 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-12 19:23:22,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:23:22,364 INFO L225 Difference]: With dead ends: 162 [2021-06-12 19:23:22,364 INFO L226 Difference]: Without dead ends: 155 [2021-06-12 19:23:22,364 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 389.7ms TimeCoverageRelationStatistics Valid=129, Invalid=627, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:23:22,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-06-12 19:23:22,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 111. [2021-06-12 19:23:22,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.0636363636363635) internal successors, (227), 110 states have internal predecessors, (227), 0 states have call successors, (0), 0 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 19:23:22,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 227 transitions. [2021-06-12 19:23:22,365 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 227 transitions. Word has length 19 [2021-06-12 19:23:22,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:23:22,366 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 227 transitions. [2021-06-12 19:23:22,366 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:23:22,366 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 227 transitions. [2021-06-12 19:23:22,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:23:22,366 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:23:22,366 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:23:22,567 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:23:22,567 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:23:22,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:23:22,567 INFO L82 PathProgramCache]: Analyzing trace with hash -1291658542, now seen corresponding path program 213 times [2021-06-12 19:23:22,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:23:22,567 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516291759] [2021-06-12 19:23:22,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:23:22,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:23:22,641 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:22,641 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:23:22,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516291759] [2021-06-12 19:23:22,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516291759] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:22,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353938181] [2021-06-12 19:23:22,641 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:23:22,661 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 19:23:22,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:23:22,662 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 19:23:22,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:23:22,874 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:22,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353938181] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:22,874 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:23:22,874 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 19:23:22,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110534159] [2021-06-12 19:23:22,874 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:23:22,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:23:22,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:23:22,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:23:22,874 INFO L87 Difference]: Start difference. First operand 111 states and 227 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:23:23,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:23:23,065 INFO L93 Difference]: Finished difference Result 127 states and 250 transitions. [2021-06-12 19:23:23,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:23:23,066 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-12 19:23:23,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:23:23,066 INFO L225 Difference]: With dead ends: 127 [2021-06-12 19:23:23,066 INFO L226 Difference]: Without dead ends: 120 [2021-06-12 19:23:23,066 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 233.5ms TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:23:23,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-06-12 19:23:23,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 107. [2021-06-12 19:23:23,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 2.0660377358490565) internal successors, (219), 106 states have internal predecessors, (219), 0 states have call successors, (0), 0 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 19:23:23,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 219 transitions. [2021-06-12 19:23:23,067 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 219 transitions. Word has length 19 [2021-06-12 19:23:23,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:23:23,067 INFO L482 AbstractCegarLoop]: Abstraction has 107 states and 219 transitions. [2021-06-12 19:23:23,067 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:23:23,067 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 219 transitions. [2021-06-12 19:23:23,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:23:23,068 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:23:23,068 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:23:23,283 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2021-06-12 19:23:23,283 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:23:23,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:23:23,284 INFO L82 PathProgramCache]: Analyzing trace with hash 787635286, now seen corresponding path program 214 times [2021-06-12 19:23:23,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:23:23,284 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942633053] [2021-06-12 19:23:23,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:23:23,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:23:23,363 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:23,363 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:23:23,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942633053] [2021-06-12 19:23:23,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942633053] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:23,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709219663] [2021-06-12 19:23:23,363 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 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:23:23,382 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:23:23,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:23:23,383 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 19:23:23,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:23:23,573 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:23,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709219663] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:23,573 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:23:23,573 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 19:23:23,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795008890] [2021-06-12 19:23:23,573 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:23:23,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:23:23,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:23:23,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:23:23,574 INFO L87 Difference]: Start difference. First operand 107 states and 219 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:23:23,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:23:23,963 INFO L93 Difference]: Finished difference Result 162 states and 315 transitions. [2021-06-12 19:23:23,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:23:23,964 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-12 19:23:23,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:23:23,964 INFO L225 Difference]: With dead ends: 162 [2021-06-12 19:23:23,964 INFO L226 Difference]: Without dead ends: 155 [2021-06-12 19:23:23,964 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 372.8ms TimeCoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:23:23,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-06-12 19:23:23,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 108. [2021-06-12 19:23:23,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.0841121495327104) internal successors, (223), 107 states have internal predecessors, (223), 0 states have call successors, (0), 0 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 19:23:23,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 223 transitions. [2021-06-12 19:23:23,965 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 223 transitions. Word has length 19 [2021-06-12 19:23:23,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:23:23,966 INFO L482 AbstractCegarLoop]: Abstraction has 108 states and 223 transitions. [2021-06-12 19:23:23,966 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:23:23,966 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 223 transitions. [2021-06-12 19:23:23,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:23:23,966 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:23:23,966 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:23:24,166 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable222,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:23:24,166 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:23:24,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:23:24,167 INFO L82 PathProgramCache]: Analyzing trace with hash 803096082, now seen corresponding path program 215 times [2021-06-12 19:23:24,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:23:24,167 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969961015] [2021-06-12 19:23:24,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:23:24,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:23:24,255 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:24,255 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:23:24,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969961015] [2021-06-12 19:23:24,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969961015] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:24,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376764535] [2021-06-12 19:23:24,255 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 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:23:24,276 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:23:24,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:23:24,276 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 19:23:24,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:23:24,455 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:24,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376764535] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:24,455 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:23:24,455 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 19:23:24,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133705256] [2021-06-12 19:23:24,455 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:23:24,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:23:24,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:23:24,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:23:24,456 INFO L87 Difference]: Start difference. First operand 108 states and 223 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:23:24,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:23:24,774 INFO L93 Difference]: Finished difference Result 158 states and 313 transitions. [2021-06-12 19:23:24,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:23:24,774 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-12 19:23:24,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:23:24,774 INFO L225 Difference]: With dead ends: 158 [2021-06-12 19:23:24,775 INFO L226 Difference]: Without dead ends: 151 [2021-06-12 19:23:24,775 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 330.1ms TimeCoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:23:24,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-06-12 19:23:24,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 106. [2021-06-12 19:23:24,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.057142857142857) internal successors, (216), 105 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 19:23:24,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 216 transitions. [2021-06-12 19:23:24,776 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 216 transitions. Word has length 19 [2021-06-12 19:23:24,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:23:24,776 INFO L482 AbstractCegarLoop]: Abstraction has 106 states and 216 transitions. [2021-06-12 19:23:24,776 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:23:24,776 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 216 transitions. [2021-06-12 19:23:24,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:23:24,776 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:23:24,776 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:23:24,977 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2021-06-12 19:23:24,977 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:23:24,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:23:24,977 INFO L82 PathProgramCache]: Analyzing trace with hash -1361161250, now seen corresponding path program 216 times [2021-06-12 19:23:24,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:23:24,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371568117] [2021-06-12 19:23:24,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:23:24,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:23:25,058 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:25,058 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:23:25,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371568117] [2021-06-12 19:23:25,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371568117] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:25,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348279491] [2021-06-12 19:23:25,058 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 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:23:25,078 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:23:25,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:23:25,079 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 19:23:25,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:23:25,254 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:25,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348279491] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:25,254 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:23:25,254 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 19:23:25,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109548416] [2021-06-12 19:23:25,254 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:23:25,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:23:25,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:23:25,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:23:25,254 INFO L87 Difference]: Start difference. First operand 106 states and 216 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:23:25,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:23:25,571 INFO L93 Difference]: Finished difference Result 158 states and 309 transitions. [2021-06-12 19:23:25,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:23:25,571 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-12 19:23:25,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:23:25,571 INFO L225 Difference]: With dead ends: 158 [2021-06-12 19:23:25,571 INFO L226 Difference]: Without dead ends: 151 [2021-06-12 19:23:25,571 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 305.8ms TimeCoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:23:25,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-06-12 19:23:25,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 108. [2021-06-12 19:23:25,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.0841121495327104) internal successors, (223), 107 states have internal predecessors, (223), 0 states have call successors, (0), 0 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 19:23:25,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 223 transitions. [2021-06-12 19:23:25,573 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 223 transitions. Word has length 19 [2021-06-12 19:23:25,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:23:25,573 INFO L482 AbstractCegarLoop]: Abstraction has 108 states and 223 transitions. [2021-06-12 19:23:25,573 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:23:25,573 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 223 transitions. [2021-06-12 19:23:25,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:23:25,573 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:23:25,573 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:23:25,773 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 225 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable224 [2021-06-12 19:23:25,773 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:23:25,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:23:25,774 INFO L82 PathProgramCache]: Analyzing trace with hash -1345700454, now seen corresponding path program 217 times [2021-06-12 19:23:25,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:23:25,774 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130008804] [2021-06-12 19:23:25,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:23:25,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:23:25,855 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:25,855 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:23:25,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130008804] [2021-06-12 19:23:25,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130008804] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:25,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639630317] [2021-06-12 19:23:25,855 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 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:23:25,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:23:25,876 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 19:23:25,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:23:26,054 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:26,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639630317] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:26,054 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:23:26,054 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 19:23:26,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109460854] [2021-06-12 19:23:26,054 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:23:26,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:23:26,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:23:26,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:23:26,054 INFO L87 Difference]: Start difference. First operand 108 states and 223 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:23:26,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:23:26,348 INFO L93 Difference]: Finished difference Result 169 states and 330 transitions. [2021-06-12 19:23:26,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:23:26,348 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-12 19:23:26,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:23:26,348 INFO L225 Difference]: With dead ends: 169 [2021-06-12 19:23:26,348 INFO L226 Difference]: Without dead ends: 162 [2021-06-12 19:23:26,348 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 299.5ms TimeCoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:23:26,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-06-12 19:23:26,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 107. [2021-06-12 19:23:26,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 2.0660377358490565) internal successors, (219), 106 states have internal predecessors, (219), 0 states have call successors, (0), 0 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 19:23:26,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 219 transitions. [2021-06-12 19:23:26,350 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 219 transitions. Word has length 19 [2021-06-12 19:23:26,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:23:26,350 INFO L482 AbstractCegarLoop]: Abstraction has 107 states and 219 transitions. [2021-06-12 19:23:26,350 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:23:26,350 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 219 transitions. [2021-06-12 19:23:26,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:23:26,350 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:23:26,350 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:23:26,550 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable225 [2021-06-12 19:23:26,551 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:23:26,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:23:26,551 INFO L82 PathProgramCache]: Analyzing trace with hash -774245648, now seen corresponding path program 218 times [2021-06-12 19:23:26,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:23:26,551 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555913012] [2021-06-12 19:23:26,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:23:26,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:23:26,625 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:26,625 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:23:26,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555913012] [2021-06-12 19:23:26,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555913012] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:26,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471995693] [2021-06-12 19:23:26,626 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 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:23:26,645 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:23:26,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:23:26,646 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 19:23:26,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:23:26,823 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:26,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471995693] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:26,824 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:23:26,824 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 19:23:26,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923927314] [2021-06-12 19:23:26,824 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:23:26,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:23:26,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:23:26,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:23:26,824 INFO L87 Difference]: Start difference. First operand 107 states and 219 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:23:27,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:23:27,074 INFO L93 Difference]: Finished difference Result 142 states and 281 transitions. [2021-06-12 19:23:27,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:23:27,075 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-12 19:23:27,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:23:27,075 INFO L225 Difference]: With dead ends: 142 [2021-06-12 19:23:27,075 INFO L226 Difference]: Without dead ends: 135 [2021-06-12 19:23:27,075 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 272.2ms TimeCoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:23:27,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-06-12 19:23:27,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 105. [2021-06-12 19:23:27,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.0576923076923075) internal successors, (214), 104 states have internal predecessors, (214), 0 states have call successors, (0), 0 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 19:23:27,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 214 transitions. [2021-06-12 19:23:27,076 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 214 transitions. Word has length 19 [2021-06-12 19:23:27,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:23:27,076 INFO L482 AbstractCegarLoop]: Abstraction has 105 states and 214 transitions. [2021-06-12 19:23:27,076 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:23:27,076 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 214 transitions. [2021-06-12 19:23:27,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:23:27,077 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:23:27,077 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:23:27,277 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable226,227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:23:27,277 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:23:27,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:23:27,277 INFO L82 PathProgramCache]: Analyzing trace with hash 1839714458, now seen corresponding path program 219 times [2021-06-12 19:23:27,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:23:27,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257748729] [2021-06-12 19:23:27,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:23:27,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:23:27,357 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:27,357 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:23:27,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257748729] [2021-06-12 19:23:27,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257748729] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:27,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245840223] [2021-06-12 19:23:27,357 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 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:23:27,378 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 19:23:27,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:23:27,378 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 19:23:27,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:23:27,555 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:27,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245840223] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:27,555 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:23:27,555 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 19:23:27,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317296912] [2021-06-12 19:23:27,555 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:23:27,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:23:27,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:23:27,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:23:27,555 INFO L87 Difference]: Start difference. First operand 105 states and 214 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:23:27,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:23:27,857 INFO L93 Difference]: Finished difference Result 176 states and 344 transitions. [2021-06-12 19:23:27,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:23:27,857 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-12 19:23:27,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:23:27,857 INFO L225 Difference]: With dead ends: 176 [2021-06-12 19:23:27,857 INFO L226 Difference]: Without dead ends: 169 [2021-06-12 19:23:27,858 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 329.1ms TimeCoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:23:27,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-06-12 19:23:27,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 107. [2021-06-12 19:23:27,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 2.0849056603773586) internal successors, (221), 106 states have internal predecessors, (221), 0 states have call successors, (0), 0 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 19:23:27,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 221 transitions. [2021-06-12 19:23:27,859 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 221 transitions. Word has length 19 [2021-06-12 19:23:27,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:23:27,859 INFO L482 AbstractCegarLoop]: Abstraction has 107 states and 221 transitions. [2021-06-12 19:23:27,859 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:23:27,859 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 221 transitions. [2021-06-12 19:23:27,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:23:27,859 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:23:27,859 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:23:28,060 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable227,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:23:28,060 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:23:28,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:23:28,060 INFO L82 PathProgramCache]: Analyzing trace with hash 1855175254, now seen corresponding path program 220 times [2021-06-12 19:23:28,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:23:28,060 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867079629] [2021-06-12 19:23:28,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:23:28,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:23:28,139 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:28,139 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:23:28,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867079629] [2021-06-12 19:23:28,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867079629] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:28,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697417896] [2021-06-12 19:23:28,139 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:23:28,160 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:23:28,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:23:28,160 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 19:23:28,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:23:28,335 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:28,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [697417896] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:28,336 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:23:28,336 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 19:23:28,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335446290] [2021-06-12 19:23:28,336 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:23:28,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:23:28,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:23:28,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:23:28,336 INFO L87 Difference]: Start difference. First operand 107 states and 221 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:23:28,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:23:28,718 INFO L93 Difference]: Finished difference Result 188 states and 367 transitions. [2021-06-12 19:23:28,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:23:28,719 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-12 19:23:28,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:23:28,719 INFO L225 Difference]: With dead ends: 188 [2021-06-12 19:23:28,719 INFO L226 Difference]: Without dead ends: 181 [2021-06-12 19:23:28,719 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 340.3ms TimeCoverageRelationStatistics Valid=113, Invalid=537, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:23:28,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-06-12 19:23:28,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 106. [2021-06-12 19:23:28,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.066666666666667) internal successors, (217), 105 states have internal predecessors, (217), 0 states have call successors, (0), 0 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 19:23:28,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 217 transitions. [2021-06-12 19:23:28,720 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 217 transitions. Word has length 19 [2021-06-12 19:23:28,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:23:28,720 INFO L482 AbstractCegarLoop]: Abstraction has 106 states and 217 transitions. [2021-06-12 19:23:28,720 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:23:28,720 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 217 transitions. [2021-06-12 19:23:28,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:23:28,721 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:23:28,721 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:23:28,921 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable228 [2021-06-12 19:23:28,921 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:23:28,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:23:28,921 INFO L82 PathProgramCache]: Analyzing trace with hash -1868337236, now seen corresponding path program 221 times [2021-06-12 19:23:28,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:23:28,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062349959] [2021-06-12 19:23:28,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:23:28,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:23:29,007 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:29,007 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:23:29,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062349959] [2021-06-12 19:23:29,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062349959] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:29,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433348301] [2021-06-12 19:23:29,007 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 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:23:29,030 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:23:29,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:23:29,030 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 19:23:29,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:23:29,207 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:29,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433348301] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:29,208 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:23:29,208 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 19:23:29,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200165249] [2021-06-12 19:23:29,208 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:23:29,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:23:29,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:23:29,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:23:29,208 INFO L87 Difference]: Start difference. First operand 106 states and 217 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:23:29,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:23:29,534 INFO L93 Difference]: Finished difference Result 160 states and 314 transitions. [2021-06-12 19:23:29,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:23:29,534 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-12 19:23:29,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:23:29,534 INFO L225 Difference]: With dead ends: 160 [2021-06-12 19:23:29,534 INFO L226 Difference]: Without dead ends: 153 [2021-06-12 19:23:29,534 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 368.5ms TimeCoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:23:29,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-06-12 19:23:29,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 105. [2021-06-12 19:23:29,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.0576923076923075) internal successors, (214), 104 states have internal predecessors, (214), 0 states have call successors, (0), 0 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 19:23:29,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 214 transitions. [2021-06-12 19:23:29,536 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 214 transitions. Word has length 19 [2021-06-12 19:23:29,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:23:29,536 INFO L482 AbstractCegarLoop]: Abstraction has 105 states and 214 transitions. [2021-06-12 19:23:29,536 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:23:29,536 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 214 transitions. [2021-06-12 19:23:29,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:23:29,536 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:23:29,536 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:23:29,744 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229,230 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:23:29,745 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:23:29,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:23:29,745 INFO L82 PathProgramCache]: Analyzing trace with hash 1265651738, now seen corresponding path program 5 times [2021-06-12 19:23:29,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:23:29,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836919857] [2021-06-12 19:23:29,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:23:29,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:23:29,818 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:29,818 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:23:29,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836919857] [2021-06-12 19:23:29,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836919857] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:29,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89891257] [2021-06-12 19:23:29,818 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 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:23:29,838 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 19:23:29,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:23:29,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:23:29,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:23:29,920 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:29,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [89891257] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:29,920 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:23:29,920 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-12 19:23:29,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588165287] [2021-06-12 19:23:29,920 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:23:29,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:23:29,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:23:29,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:23:29,920 INFO L87 Difference]: Start difference. First operand 105 states and 214 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 19:23:30,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:23:30,115 INFO L93 Difference]: Finished difference Result 147 states and 293 transitions. [2021-06-12 19:23:30,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 19:23:30,115 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 19 [2021-06-12 19:23:30,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:23:30,115 INFO L225 Difference]: With dead ends: 147 [2021-06-12 19:23:30,115 INFO L226 Difference]: Without dead ends: 136 [2021-06-12 19:23:30,115 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 241.8ms TimeCoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:23:30,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-06-12 19:23:30,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 109. [2021-06-12 19:23:30,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.074074074074074) internal successors, (224), 108 states have internal predecessors, (224), 0 states have call successors, (0), 0 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 19:23:30,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 224 transitions. [2021-06-12 19:23:30,117 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 224 transitions. Word has length 19 [2021-06-12 19:23:30,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:23:30,117 INFO L482 AbstractCegarLoop]: Abstraction has 109 states and 224 transitions. [2021-06-12 19:23:30,117 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 19:23:30,117 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 224 transitions. [2021-06-12 19:23:30,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:23:30,117 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:23:30,117 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:23:30,317 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable230 [2021-06-12 19:23:30,318 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:23:30,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:23:30,318 INFO L82 PathProgramCache]: Analyzing trace with hash 1888774482, now seen corresponding path program 222 times [2021-06-12 19:23:30,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:23:30,318 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473271891] [2021-06-12 19:23:30,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:23:30,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:23:30,398 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:30,398 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:23:30,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473271891] [2021-06-12 19:23:30,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473271891] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:30,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000182024] [2021-06-12 19:23:30,398 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:23:30,430 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:23:30,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:23:30,430 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 19:23:30,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:23:30,602 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:30,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000182024] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:30,603 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:23:30,603 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 19:23:30,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052253319] [2021-06-12 19:23:30,603 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:23:30,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:23:30,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:23:30,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:23:30,603 INFO L87 Difference]: Start difference. First operand 109 states and 224 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:23:30,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:23:30,976 INFO L93 Difference]: Finished difference Result 172 states and 333 transitions. [2021-06-12 19:23:30,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 19:23:30,977 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-12 19:23:30,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:23:30,977 INFO L225 Difference]: With dead ends: 172 [2021-06-12 19:23:30,977 INFO L226 Difference]: Without dead ends: 158 [2021-06-12 19:23:30,977 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 386.2ms TimeCoverageRelationStatistics Valid=143, Invalid=787, Unknown=0, NotChecked=0, Total=930 [2021-06-12 19:23:30,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-06-12 19:23:30,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 109. [2021-06-12 19:23:30,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.074074074074074) internal successors, (224), 108 states have internal predecessors, (224), 0 states have call successors, (0), 0 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 19:23:30,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 224 transitions. [2021-06-12 19:23:30,978 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 224 transitions. Word has length 19 [2021-06-12 19:23:30,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:23:30,978 INFO L482 AbstractCegarLoop]: Abstraction has 109 states and 224 transitions. [2021-06-12 19:23:30,978 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19:23:30,978 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 224 transitions. [2021-06-12 19:23:30,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:23:30,979 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:23:30,979 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:23:31,179 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,232 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:23:31,179 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:23:31,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:23:31,179 INFO L82 PathProgramCache]: Analyzing trace with hash -26764772, now seen corresponding path program 5 times [2021-06-12 19:23:31,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:23:31,180 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360237583] [2021-06-12 19:23:31,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:23:31,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:23:31,271 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:31,271 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:23:31,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360237583] [2021-06-12 19:23:31,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360237583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:31,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085356848] [2021-06-12 19:23:31,271 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 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:23:31,294 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-12 19:23:31,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:23:31,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-12 19:23:31,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:23:31,403 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:31,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085356848] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:31,403 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:23:31,403 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-12 19:23:31,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236900293] [2021-06-12 19:23:31,404 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:23:31,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:23:31,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:23:31,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:23:31,404 INFO L87 Difference]: Start difference. First operand 109 states and 224 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 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 19:23:31,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:23:31,663 INFO L93 Difference]: Finished difference Result 146 states and 293 transitions. [2021-06-12 19:23:31,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:23:31,663 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 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 21 [2021-06-12 19:23:31,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:23:31,664 INFO L225 Difference]: With dead ends: 146 [2021-06-12 19:23:31,664 INFO L226 Difference]: Without dead ends: 133 [2021-06-12 19:23:31,664 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 317.6ms TimeCoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:23:31,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-06-12 19:23:31,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 111. [2021-06-12 19:23:31,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.081818181818182) internal successors, (229), 110 states have internal predecessors, (229), 0 states have call successors, (0), 0 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 19:23:31,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 229 transitions. [2021-06-12 19:23:31,665 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 229 transitions. Word has length 21 [2021-06-12 19:23:31,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:23:31,665 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 229 transitions. [2021-06-12 19:23:31,665 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 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 19:23:31,665 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 229 transitions. [2021-06-12 19:23:31,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:23:31,665 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:23:31,665 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:23:31,866 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable232 [2021-06-12 19:23:31,866 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:23:31,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:23:31,866 INFO L82 PathProgramCache]: Analyzing trace with hash 1997566364, now seen corresponding path program 223 times [2021-06-12 19:23:31,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:23:31,866 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349402903] [2021-06-12 19:23:31,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:23:31,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:23:31,962 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:31,962 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:23:31,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349402903] [2021-06-12 19:23:31,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349402903] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:31,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077282074] [2021-06-12 19:23:31,963 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 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:23:31,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:23:31,984 WARN L261 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:23:31,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:23:33,157 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:33,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077282074] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:33,158 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:23:33,158 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-12 19:23:33,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508506246] [2021-06-12 19:23:33,158 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 19:23:33,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:23:33,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 19:23:33,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:23:33,158 INFO L87 Difference]: Start difference. First operand 111 states and 229 transitions. Second operand has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 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 19:23:33,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:23:33,659 INFO L93 Difference]: Finished difference Result 154 states and 304 transitions. [2021-06-12 19:23:33,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 19:23:33,659 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 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 21 [2021-06-12 19:23:33,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:23:33,659 INFO L225 Difference]: With dead ends: 154 [2021-06-12 19:23:33,659 INFO L226 Difference]: Without dead ends: 147 [2021-06-12 19:23:33,660 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 449.4ms TimeCoverageRelationStatistics Valid=118, Invalid=752, Unknown=0, NotChecked=0, Total=870 [2021-06-12 19:23:33,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-06-12 19:23:33,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 111. [2021-06-12 19:23:33,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.081818181818182) internal successors, (229), 110 states have internal predecessors, (229), 0 states have call successors, (0), 0 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 19:23:33,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 229 transitions. [2021-06-12 19:23:33,661 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 229 transitions. Word has length 21 [2021-06-12 19:23:33,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:23:33,661 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 229 transitions. [2021-06-12 19:23:33,661 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 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 19:23:33,661 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 229 transitions. [2021-06-12 19:23:33,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:23:33,661 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:23:33,661 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:23:33,861 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 234 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233 [2021-06-12 19:23:33,862 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:23:33,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:23:33,862 INFO L82 PathProgramCache]: Analyzing trace with hash 1614845976, now seen corresponding path program 224 times [2021-06-12 19:23:33,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:23:33,862 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224380769] [2021-06-12 19:23:33,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:23:33,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:23:33,963 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:33,963 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:23:33,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224380769] [2021-06-12 19:23:33,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224380769] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:33,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063142099] [2021-06-12 19:23:33,963 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:23:33,987 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:23:33,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:23:33,987 WARN L261 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:23:33,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:23:34,174 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:34,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063142099] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:34,175 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:23:34,175 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-12 19:23:34,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395058415] [2021-06-12 19:23:34,175 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 19:23:34,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:23:34,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 19:23:34,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:23:34,175 INFO L87 Difference]: Start difference. First operand 111 states and 229 transitions. Second operand has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 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 19:23:34,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:23:34,588 INFO L93 Difference]: Finished difference Result 159 states and 314 transitions. [2021-06-12 19:23:34,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 19:23:34,589 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 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 21 [2021-06-12 19:23:34,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:23:34,589 INFO L225 Difference]: With dead ends: 159 [2021-06-12 19:23:34,589 INFO L226 Difference]: Without dead ends: 152 [2021-06-12 19:23:34,589 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 396.8ms TimeCoverageRelationStatistics Valid=113, Invalid=699, Unknown=0, NotChecked=0, Total=812 [2021-06-12 19:23:34,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-06-12 19:23:34,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 113. [2021-06-12 19:23:34,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.0892857142857144) internal successors, (234), 112 states have internal predecessors, (234), 0 states have call successors, (0), 0 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 19:23:34,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 234 transitions. [2021-06-12 19:23:34,590 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 234 transitions. Word has length 21 [2021-06-12 19:23:34,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:23:34,590 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 234 transitions. [2021-06-12 19:23:34,590 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 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 19:23:34,590 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 234 transitions. [2021-06-12 19:23:34,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:23:34,591 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:23:34,591 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:23:34,791 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2021-06-12 19:23:34,791 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:23:34,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:23:34,791 INFO L82 PathProgramCache]: Analyzing trace with hash -600827492, now seen corresponding path program 225 times [2021-06-12 19:23:34,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:23:34,791 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190381998] [2021-06-12 19:23:34,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:23:34,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:23:34,889 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:34,890 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:23:34,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190381998] [2021-06-12 19:23:34,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190381998] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:34,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529186334] [2021-06-12 19:23:34,890 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 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:23:34,911 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 19:23:34,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:23:34,912 WARN L261 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:23:34,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:23:35,093 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:35,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529186334] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:35,093 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:23:35,093 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-12 19:23:35,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290716226] [2021-06-12 19:23:35,093 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 19:23:35,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:23:35,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 19:23:35,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:23:35,094 INFO L87 Difference]: Start difference. First operand 113 states and 234 transitions. Second operand has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 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 19:23:35,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:23:35,541 INFO L93 Difference]: Finished difference Result 185 states and 362 transitions. [2021-06-12 19:23:35,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:23:35,541 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 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 21 [2021-06-12 19:23:35,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:23:35,541 INFO L225 Difference]: With dead ends: 185 [2021-06-12 19:23:35,541 INFO L226 Difference]: Without dead ends: 178 [2021-06-12 19:23:35,541 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 401.3ms TimeCoverageRelationStatistics Valid=123, Invalid=689, Unknown=0, NotChecked=0, Total=812 [2021-06-12 19:23:35,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-06-12 19:23:35,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 114. [2021-06-12 19:23:35,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.106194690265487) internal successors, (238), 113 states have internal predecessors, (238), 0 states have call successors, (0), 0 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 19:23:35,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 238 transitions. [2021-06-12 19:23:35,543 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 238 transitions. Word has length 21 [2021-06-12 19:23:35,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:23:35,543 INFO L482 AbstractCegarLoop]: Abstraction has 114 states and 238 transitions. [2021-06-12 19:23:35,543 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 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 19:23:35,543 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 238 transitions. [2021-06-12 19:23:35,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:23:35,543 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:23:35,543 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:23:35,743 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 236 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2021-06-12 19:23:35,744 INFO L430 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:23:35,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:23:35,744 INFO L82 PathProgramCache]: Analyzing trace with hash -585366696, now seen corresponding path program 226 times [2021-06-12 19:23:35,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:23:35,744 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486809535] [2021-06-12 19:23:35,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:23:35,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:23:35,843 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:35,844 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:23:35,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486809535] [2021-06-12 19:23:35,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486809535] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:35,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526377550] [2021-06-12 19:23:35,844 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 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:23:35,864 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:23:35,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:23:35,865 WARN L261 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:23:35,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:23:36,223 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:36,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1526377550] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:36,224 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:23:36,224 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-12 19:23:36,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396631285] [2021-06-12 19:23:36,224 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 19:23:36,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:23:36,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 19:23:36,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:23:36,224 INFO L87 Difference]: Start difference. First operand 114 states and 238 transitions. Second operand has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 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 19:23:36,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:23:36,758 INFO L93 Difference]: Finished difference Result 168 states and 336 transitions. [2021-06-12 19:23:36,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:23:36,758 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 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 21 [2021-06-12 19:23:36,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:23:36,758 INFO L225 Difference]: With dead ends: 168 [2021-06-12 19:23:36,758 INFO L226 Difference]: Without dead ends: 161 [2021-06-12 19:23:36,758 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 501.2ms TimeCoverageRelationStatistics Valid=110, Invalid=646, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:23:36,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-06-12 19:23:36,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 112. [2021-06-12 19:23:36,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.081081081081081) internal successors, (231), 111 states have internal predecessors, (231), 0 states have call successors, (0), 0 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 19:23:36,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 231 transitions. [2021-06-12 19:23:36,760 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 231 transitions. Word has length 21 [2021-06-12 19:23:36,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:23:36,760 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 231 transitions. [2021-06-12 19:23:36,760 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 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 19:23:36,760 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 231 transitions. [2021-06-12 19:23:36,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:23:36,760 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:23:36,760 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:23:36,970 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable236 [2021-06-12 19:23:36,970 INFO L430 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:23:36,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:23:36,971 INFO L82 PathProgramCache]: Analyzing trace with hash -1736931496, now seen corresponding path program 227 times [2021-06-12 19:23:36,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:23:36,971 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089976514] [2021-06-12 19:23:36,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:23:36,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:23:37,071 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:37,071 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:23:37,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089976514] [2021-06-12 19:23:37,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089976514] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:37,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161177689] [2021-06-12 19:23:37,071 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 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:23:37,092 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 19:23:37,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:23:37,092 WARN L261 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:23:37,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:23:38,274 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:38,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161177689] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:38,274 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:23:38,274 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-12 19:23:38,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757874582] [2021-06-12 19:23:38,274 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 19:23:38,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:23:38,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 19:23:38,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:23:38,274 INFO L87 Difference]: Start difference. First operand 112 states and 231 transitions. Second operand has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 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 19:23:38,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:23:38,736 INFO L93 Difference]: Finished difference Result 176 states and 347 transitions. [2021-06-12 19:23:38,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:23:38,736 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 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 21 [2021-06-12 19:23:38,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:23:38,737 INFO L225 Difference]: With dead ends: 176 [2021-06-12 19:23:38,737 INFO L226 Difference]: Without dead ends: 169 [2021-06-12 19:23:38,737 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 435.0ms TimeCoverageRelationStatistics Valid=128, Invalid=684, Unknown=0, NotChecked=0, Total=812 [2021-06-12 19:23:38,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-06-12 19:23:38,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 114. [2021-06-12 19:23:38,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.106194690265487) internal successors, (238), 113 states have internal predecessors, (238), 0 states have call successors, (0), 0 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 19:23:38,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 238 transitions. [2021-06-12 19:23:38,738 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 238 transitions. Word has length 21 [2021-06-12 19:23:38,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:23:38,738 INFO L482 AbstractCegarLoop]: Abstraction has 114 states and 238 transitions. [2021-06-12 19:23:38,738 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 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 19:23:38,738 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 238 transitions. [2021-06-12 19:23:38,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:23:38,739 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:23:38,739 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:23:38,939 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable237,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:23:38,939 INFO L430 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:23:38,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:23:38,939 INFO L82 PathProgramCache]: Analyzing trace with hash -1721470700, now seen corresponding path program 228 times [2021-06-12 19:23:38,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:23:38,940 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050268405] [2021-06-12 19:23:38,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:23:38,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:23:39,113 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:39,113 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:23:39,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050268405] [2021-06-12 19:23:39,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050268405] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:39,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247227961] [2021-06-12 19:23:39,113 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 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:23:39,135 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 19:23:39,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:23:39,135 WARN L261 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:23:39,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:23:39,326 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:39,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247227961] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:39,326 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:23:39,327 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-12 19:23:39,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842682204] [2021-06-12 19:23:39,327 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 19:23:39,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:23:39,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 19:23:39,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:23:39,327 INFO L87 Difference]: Start difference. First operand 114 states and 238 transitions. Second operand has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 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 19:23:39,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:23:39,735 INFO L93 Difference]: Finished difference Result 177 states and 348 transitions. [2021-06-12 19:23:39,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 19:23:39,735 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 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 21 [2021-06-12 19:23:39,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:23:39,735 INFO L225 Difference]: With dead ends: 177 [2021-06-12 19:23:39,735 INFO L226 Difference]: Without dead ends: 170 [2021-06-12 19:23:39,735 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 438.0ms TimeCoverageRelationStatistics Valid=112, Invalid=644, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:23:39,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-06-12 19:23:39,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 113. [2021-06-12 19:23:39,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.0892857142857144) internal successors, (234), 112 states have internal predecessors, (234), 0 states have call successors, (0), 0 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 19:23:39,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 234 transitions. [2021-06-12 19:23:39,737 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 234 transitions. Word has length 21 [2021-06-12 19:23:39,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:23:39,737 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 234 transitions. [2021-06-12 19:23:39,737 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 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 19:23:39,737 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 234 transitions. [2021-06-12 19:23:39,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:23:39,737 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:23:39,737 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:23:39,937 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 239 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable238 [2021-06-12 19:23:39,937 INFO L430 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:23:39,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:23:39,938 INFO L82 PathProgramCache]: Analyzing trace with hash -1150015894, now seen corresponding path program 229 times [2021-06-12 19:23:39,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:23:39,938 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891037618] [2021-06-12 19:23:39,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:23:39,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:23:40,033 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:40,034 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:23:40,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891037618] [2021-06-12 19:23:40,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891037618] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:40,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102616752] [2021-06-12 19:23:40,034 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 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:23:40,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:23:40,055 WARN L261 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:23:40,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:23:40,242 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:40,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [102616752] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:40,243 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:23:40,243 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-12 19:23:40,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758026950] [2021-06-12 19:23:40,243 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 19:23:40,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:23:40,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 19:23:40,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:23:40,243 INFO L87 Difference]: Start difference. First operand 113 states and 234 transitions. Second operand has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 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 19:23:40,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:23:40,411 INFO L93 Difference]: Finished difference Result 140 states and 279 transitions. [2021-06-12 19:23:40,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:23:40,411 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 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 21 [2021-06-12 19:23:40,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:23:40,411 INFO L225 Difference]: With dead ends: 140 [2021-06-12 19:23:40,411 INFO L226 Difference]: Without dead ends: 133 [2021-06-12 19:23:40,412 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 274.0ms TimeCoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:23:40,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-06-12 19:23:40,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 111. [2021-06-12 19:23:40,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.081818181818182) internal successors, (229), 110 states have internal predecessors, (229), 0 states have call successors, (0), 0 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 19:23:40,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 229 transitions. [2021-06-12 19:23:40,413 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 229 transitions. Word has length 21 [2021-06-12 19:23:40,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:23:40,413 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 229 transitions. [2021-06-12 19:23:40,413 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 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 19:23:40,413 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 229 transitions. [2021-06-12 19:23:40,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:23:40,413 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:23:40,413 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:23:40,628 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable239 [2021-06-12 19:23:40,629 INFO L430 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:23:40,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:23:40,629 INFO L82 PathProgramCache]: Analyzing trace with hash 1759602972, now seen corresponding path program 230 times [2021-06-12 19:23:40,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:23:40,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324715893] [2021-06-12 19:23:40,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:23:40,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:23:40,727 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:40,727 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:23:40,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324715893] [2021-06-12 19:23:40,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324715893] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:40,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800389443] [2021-06-12 19:23:40,727 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 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:23:40,748 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:23:40,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:23:40,749 WARN L261 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:23:40,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... Received shutdown request... [2021-06-12 19:35:30,367 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,241 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:35:30,367 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-12 19:35:30,369 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-12 19:35:30,370 WARN L196 ceAbstractionStarter]: Timeout [2021-06-12 19:35:30,370 INFO L202 PluginConnector]: Adding new model mult-comm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.06 07:35:30 BasicIcfg [2021-06-12 19:35:30,370 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-12 19:35:30,371 INFO L168 Benchmark]: Toolchain (without parser) took 901456.68 ms. Allocated memory was 180.4 MB in the beginning and 783.3 MB in the end (delta: 602.9 MB). Free memory was 160.3 MB in the beginning and 436.6 MB in the end (delta: -276.3 MB). Peak memory consumption was 484.9 MB. Max. memory is 8.0 GB. [2021-06-12 19:35:30,371 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 180.4 MB. Free memory is still 161.4 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-06-12 19:35:30,371 INFO L168 Benchmark]: Boogie Procedure Inliner took 18.95 ms. Allocated memory is still 180.4 MB. Free memory was 160.3 MB in the beginning and 158.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-06-12 19:35:30,371 INFO L168 Benchmark]: Boogie Preprocessor took 10.30 ms. Allocated memory is still 180.4 MB. Free memory was 158.8 MB in the beginning and 157.8 MB in the end (delta: 951.4 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-06-12 19:35:30,371 INFO L168 Benchmark]: RCFGBuilder took 240.20 ms. Allocated memory is still 180.4 MB. Free memory was 157.8 MB in the beginning and 146.4 MB in the end (delta: 11.5 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2021-06-12 19:35:30,371 INFO L168 Benchmark]: TraceAbstraction took 901176.71 ms. Allocated memory was 180.4 MB in the beginning and 783.3 MB in the end (delta: 602.9 MB). Free memory was 145.9 MB in the beginning and 436.6 MB in the end (delta: -290.6 MB). Peak memory consumption was 470.2 MB. Max. memory is 8.0 GB. [2021-06-12 19:35:30,371 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 180.4 MB. Free memory is still 161.4 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 18.95 ms. Allocated memory is still 180.4 MB. Free memory was 160.3 MB in the beginning and 158.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 10.30 ms. Allocated memory is still 180.4 MB. Free memory was 158.8 MB in the beginning and 157.8 MB in the end (delta: 951.4 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 240.20 ms. Allocated memory is still 180.4 MB. Free memory was 157.8 MB in the beginning and 146.4 MB in the end (delta: 11.5 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 901176.71 ms. Allocated memory was 180.4 MB in the beginning and 783.3 MB in the end (delta: 602.9 MB). Free memory was 145.9 MB in the beginning and 436.6 MB in the end (delta: -290.6 MB). Peak memory consumption was 470.2 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 50]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 22 with TraceHistMax 3,while TraceCheckSpWp was constructing forward predicates,while ExplicitLhsPolynomialRelations was build 0 of 1 xjuncts. - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 5 procedures, 28 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 901090.1ms, OverallIterations: 241, TraceHistogramMax: 5, EmptinessCheckTime: 57.0ms, AutomataDifference: 72282.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 12.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 5334 SDtfs, 16018 SDslu, 40776 SDs, 0 SdLazy, 84636 SolverSat, 2181 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 30054.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 7860 GetRequests, 2318 SyntacticMatches, 287 SemanticMatches, 5255 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26016 ImplicationChecksByTransitivity, 78552.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=119occurred in iteration=189, InterpolantAutomatonStates: 3673, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 466.9ms AutomataMinimizationTime, 240 MinimizatonAttempts, 10667 StatesRemovedByMinimization, 240 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 534.4ms SsaConstructionTime, 1616.1ms SatisfiabilityAnalysisTime, 62825.0ms InterpolantComputationTime, 8681 NumberOfCodeBlocks, 8681 NumberOfCodeBlocksAsserted, 840 NumberOfCheckSat, 8202 ConstructedInterpolants, 0 QuantifiedInterpolants, 166902 SizeOfPredicates, 1394 NumberOfNonLiveVariables, 12391 ConjunctsInSsa, 5771 ConjunctsInUnsatCore, 479 InterpolantComputations, 1 PerfectInterpolantSequences, 0/3694 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